Re: Header thread
[Re: HardcoreB]
#3014109
02/10/22 05:52 PM
02/10/22 05:52 PM
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Joined: Jan 2003
Posts: 2,926 A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,926
A shed in England
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Not the best pic but this was the hard side, 2 1/4 into a 4" merge. E Body. Around 900hp on a good day, though we have made a few changes since this was taken (TR) but the same headers. Edit: Found a couple more.
Last edited by Tig; 02/10/22 06:21 PM.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: Header thread
[Re: Al_Alguire]
#3014145
02/10/22 08:09 PM
02/10/22 08:09 PM
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Joined: Jan 2003
Posts: 10,038 MN
JERICOGTX
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,038
MN
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Here are the headers I made for my Road Runner. 2.125-2.250, into a 4” collector. Did not want to cut anything on the car to make them fit.
69 GTX
68 Road Runner
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Re: Header thread
[Re: JERICOGTX]
#3014147
02/10/22 08:42 PM
02/10/22 08:42 PM
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Joined: Jan 2003
Posts: 11,720 Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,720
Portage,michigan
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Here are the headers I made for my Road Runner. 2.125-2.250, into a 4” collector. Did not want to cut anything on the car to make them fit. Amazingly nice!
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8
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Re: Header thread
[Re: B3422W5]
#3014162
02/10/22 09:38 PM
02/10/22 09:38 PM
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Superfreak
Unregistered
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Superfreak
Unregistered
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Where could one get a pair of flanges for Stage V hemi heads? I would like to make my own as well.
Thanks
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Re: Header thread
[Re: ]
#3014233
02/11/22 08:05 AM
02/11/22 08:05 AM
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Joined: Nov 2003
Posts: 1,840 NW Indiana
fbs63
top fuel
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top fuel
Joined: Nov 2003
Posts: 1,840
NW Indiana
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Where could one get a pair of flanges for Stage V hemi heads? I would like to make my own as well.
Thanks SPD Exhaust has nice cnc machined flanges. Stainless Headers in Minnesota makes nice water jet (or laser cut) flanges.
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Re: Header thread
[Re: HardcoreB]
#3014807
02/12/22 08:22 PM
02/12/22 08:22 PM
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Joined: Aug 2007
Posts: 998 Clinton Township, Michigan
Dartin
super stock
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super stock
Joined: Aug 2007
Posts: 998
Clinton Township, Michigan
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These are on Dartin's hoopty. 2" x 3.5" built for a target 700HP still using them at about 850HP. Yes, we’ve been using the ones you built for a lot of years. Can remove or install either side easily in a quick amount of time. No complaints here for sure.
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Re: Header thread
[Re: Dartin]
#3016007
02/16/22 02:15 PM
02/16/22 02:15 PM
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Joined: Aug 2003
Posts: 4,688 On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,688
On the parachute mount
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Dumb question...other than durability and $$$ is there any difference between stainless and mild steel ??? Oh and i have some A body big block headers for sale in the race parts section
....BAD A$$ STREET CAR.....
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Re: Header thread
[Re: n20mstr]
#3016021
02/16/22 02:34 PM
02/16/22 02:34 PM
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Joined: Jan 2003
Posts: 10,038 MN
JERICOGTX
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,038
MN
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Dumb question...other than durability and $$$ is there any difference between stainless and mild steel ??? Oh and i have some A body big block headers for sale in the race parts section My stainless ones are heavy...
69 GTX
68 Road Runner
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Re: Header thread
[Re: JERICOGTX]
#3016026
02/16/22 02:46 PM
02/16/22 02:46 PM
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Joined: Jan 2003
Posts: 19,375 Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,375
Las Vegas
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Dumb question...other than durability and $$$ is there any difference between stainless and mild steel ??? Oh and i have some A body big block headers for sale in the race parts section My stainless ones are heavy... Been our experience too
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Header thread
[Re: n20mstr]
#3016031
02/16/22 03:04 PM
02/16/22 03:04 PM
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Joined: Jan 2003
Posts: 4,066 Shelby Twp. Mi
HardcoreB
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,066
Shelby Twp. Mi
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Dumb question...other than durability and $$$ is there any difference between stainless and mild steel ??? Oh and i have some A body big block headers for sale in the race parts section When you throw in the durability part, I'm not sure if i was building my own I'd use M/S anymore, especially if you're spraying. Specifically for your application, the general pathway of "UP and OVER" then out the fender might be the best. You could error on the small side of pipemax if the lengths are shorter and the trajectory is nice. Thanks for all the additional pics that have been added! I have a decent inventory of bends yet but, apparently the materials cost has gone up a bunch. That may be your deciding factor. So, you're saying your old headers that served you well are for sale in the for sale section!?
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Re: Header thread
[Re: HardcoreB]
#3016036
02/16/22 03:17 PM
02/16/22 03:17 PM
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Joined: Aug 2003
Posts: 4,688 On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,688
On the parachute mount
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Dumb question...other than durability and $$$ is there any difference between stainless and mild steel ??? Oh and i have some A body big block headers for sale in the race parts section When you throw in the durability part, I'm not sure if i was building my own I'd use M/S anymore, especially if you're spraying. Specifically for your application, the general pathway of "UP and OVER" then out the fender might be the best. You could error on the small side of pipemax if the lengths are shorter and the trajectory is nice. Thanks for all the additional pics that have been added! I have a decent inventory of bends yet but, apparently the materials cost has gone up a bunch. That may be your deciding factor. So, you're saying your old headers that served you well are for sale in the for sale section!? The old headers ive been using ......yes they are for sale . I brought them to a very reputable engine shop for a dyno session and....they kind of told me [censored] are these ??? And they are not the correct size and length. To get what i really need, they are going to have to be fender exits. Short and BIGGER. Yea im a special case because im using a power adder and NA is of really no concern
Last edited by n20mstr; 02/16/22 03:18 PM.
....BAD A$$ STREET CAR.....
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Re: Header thread
[Re: Al_Alguire]
#3016041
02/16/22 03:34 PM
02/16/22 03:34 PM
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Joined: Jan 2003
Posts: 17,876 S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,876
S.E. Michigan
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Dumb question...other than durability and $$$ is there any difference between stainless and mild steel ??? Oh and i have some A body big block headers for sale in the race parts section My stainless ones are heavy... Been our experience too I'll likely never attempt this, but curious: what gauge tubing are you guys using?
Rich H.
Esse Quam Videri
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Re: Header thread
[Re: HardcoreB]
#3016059
02/16/22 04:15 PM
02/16/22 04:15 PM
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Joined: Aug 2003
Posts: 4,688 On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,688
On the parachute mount
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Now that I'm remembering, after looking at the pics, you might do well going up and out. Moving the master cyl might be in order and the smartest. Dartin's are on an RB with -1's so you can get a visual of what a gang of tubes may look like. The worst flowing will be #2 by far. Orient them firing into the collector in a circle too. Should be easier to fab putting the collector above the mid-level body line... Yes master cyl is going inside with a wilwood reverse pedal assembly. Im really leaning towards front of the tire exit because i dont want to chop up the firewall....but who knows. Right now im stripping it all down to get the frame straight and get the inner fender wells out.
....BAD A$$ STREET CAR.....
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Re: Header thread
[Re: Al_Alguire]
#3016178
02/16/22 10:52 PM
02/16/22 10:52 PM
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Joined: Dec 2005
Posts: 11,611 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,611
Fulton County, PA
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Dumb question...other than durability and $$$ is there any difference between stainless and mild steel ??? Oh and i have some A body big block headers for sale in the race parts section My stainless ones are heavy... Been our experience too 5% heavier. Next time use 18ga.
If the results don't match the theory, change the theory.
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Re: Header thread
[Re: n20mstr]
#3016181
02/16/22 11:00 PM
02/16/22 11:00 PM
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Joined: Dec 2005
Posts: 11,611 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,611
Fulton County, PA
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Dumb question...other than durability and $$$ is there any difference between stainless and mild steel ??? Oh and i have some A body big block headers for sale in the race parts section Rust. Mild steel will rust inside, even if coated. Some of the rust scale will end up back in the cylinder. Heat conduction. SS doesn't conduct heat as well. More heat stays in the exhaust gas.
If the results don't match the theory, change the theory.
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Re: Header thread
[Re: CMcAllister]
#3016223
02/17/22 08:08 AM
02/17/22 08:08 AM
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Joined: Nov 2003
Posts: 1,840 NW Indiana
fbs63
top fuel
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top fuel
Joined: Nov 2003
Posts: 1,840
NW Indiana
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Dumb question...other than durability and $$$ is there any difference between stainless and mild steel ??? Oh and i have some A body big block headers for sale in the race parts section Rust. Mild steel will rust inside, even if coated. Some of the rust scale will end up back in the cylinder. Heat conduction. SS doesn't conduct heat as well. More heat stays in the exhaust gas. Plus you can use 18 gauge tube.
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Re: Header thread
[Re: fbs63]
#3016286
02/17/22 01:14 PM
02/17/22 01:14 PM
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Joined: Dec 2005
Posts: 11,611 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,611
Fulton County, PA
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Dumb question...other than durability and $$$ is there any difference between stainless and mild steel ??? Oh and i have some A body big block headers for sale in the race parts section Rust. Mild steel will rust inside, even if coated. Some of the rust scale will end up back in the cylinder. Heat conduction. SS doesn't conduct heat as well. More heat stays in the exhaust gas. Plus you can use 18 gauge tube. 16 gauge set, 30", 2.125 d, with 3/8" full flange and a merge collector is heavy. No doubt.
If the results don't match the theory, change the theory.
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Re: Header thread
[Re: CMcAllister]
#3016356
02/17/22 06:23 PM
02/17/22 06:23 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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3/8 Flanges with added center bolts, no gaskets. 1 7/8" 321 stainless tube. Made a poor choice of having them ceramic coated. Burned off after the first few launches. Very expensive even doing it all myself. Worth every cent. Never needed any repairs even with torturous zero degree launch strategies.
"use it 'till it breaks, replace as needed"
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Re: Header thread
[Re: Cab_Burge]
#3016382
02/17/22 08:21 PM
02/17/22 08:21 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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broke more than one exhaust rocker… that pic was to show the exhaust flange with center studs between the ports.
"use it 'till it breaks, replace as needed"
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Re: Header thread
[Re: HardcoreB]
#3016521
02/18/22 01:18 PM
02/18/22 01:18 PM
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Joined: Jan 2003
Posts: 19,375 Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,375
Las Vegas
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While definitely not a Mopar thought I would share some more headers. Vettes old small, pump gas street car headers to it's current racey ones This is a stock front end car, stock steering, control arms and frame rails. Street car days Current headers
Last edited by Al_Alguire; 02/18/22 01:20 PM.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Header thread
[Re: Al_Alguire]
#3016537
02/18/22 02:14 PM
02/18/22 02:14 PM
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Joined: Dec 2005
Posts: 11,611 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,611
Fulton County, PA
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While definitely not a Mopar thought I would share some more headers. Vettes old small, pump gas street car headers to it's current racey ones This is a stock front end car, stock steering, control arms and frame rails. Street car days Current headers Ovaled tube in the second pic is interesting. You ever talk to someone at one of the big race shops about the effects of doing that? Maintaining the area as opposed to just beating a dent in it seems a better solution. Just wonder if it hurts it. Sometimes you just have to make it fit.
If the results don't match the theory, change the theory.
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Re: Header thread
[Re: CMcAllister]
#3016548
02/18/22 02:40 PM
02/18/22 02:40 PM
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Joined: Jan 2003
Posts: 19,375 Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,375
Las Vegas
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Many other changes to those heads between those two pics. The last revision before the new headers was to move the exhaust valve guide/valve over to make more room for the largest intake valve we could get in that small chamber. The entire exhaust port was then reshaped for a much smaller valve. All the work was done by Slawko of course. But good catch FWIW these headers were done by REF in Kingman, Greg and the guys have YEARS of experience with everything from bracket stuff to comp. We hold the shop record for the longest amount of time a car has spent in the shop getting headers made. It was there 4.5 days. As Jay pointed out most stuff is in at breakfast and done by lunch or shortly there after.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Header thread
[Re: CMcAllister]
#3056833
07/06/22 05:57 PM
07/06/22 05:57 PM
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Joined: Dec 2021
Posts: 1,145 Loudoun County, VA
Brad_Haak
super stock
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super stock
Joined: Dec 2021
Posts: 1,145
Loudoun County, VA
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I used to have the magazine this article was in originally, but just came across it online. It may be from 2003, but I believe most of the info is still pertinent. LINK
2021 Challenger 6.4L Scat Pack 1320 100% stock: 1.680, 11.894 at 113.75 (DA 175 ft) weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008] pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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Re: Header thread
[Re: n20mstr]
#3056955
07/07/22 12:02 AM
07/07/22 12:02 AM
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Joined: Mar 2003
Posts: 6,334 Heaven
EvilB1Dart
master
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master
Joined: Mar 2003
Posts: 6,334
Heaven
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Nice work Tony! Looks like decent access to plugs. Dracarys……
"Any fool can know. The point is to understand"
- A. Einstein
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Re: Header thread
[Re: EvilB1Dart]
#3056998
07/07/22 06:15 AM
07/07/22 06:15 AM
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Joined: Jan 2003
Posts: 10,038 MN
JERICOGTX
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,038
MN
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Here are the headers I built. Finished, and on the engine.
69 GTX
68 Road Runner
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Re: Header thread
[Re: JERICOGTX]
#3057024
07/07/22 08:26 AM
07/07/22 08:26 AM
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Joined: Dec 2021
Posts: 1,145 Loudoun County, VA
Brad_Haak
super stock
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super stock
Joined: Dec 2021
Posts: 1,145
Loudoun County, VA
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You guys do some nice work!
2021 Challenger 6.4L Scat Pack 1320 100% stock: 1.680, 11.894 at 113.75 (DA 175 ft) weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008] pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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Re: Header thread
[Re: EvilB1Dart]
#3057035
07/07/22 08:59 AM
07/07/22 08:59 AM
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Joined: Jan 2003
Posts: 4,066 Shelby Twp. Mi
HardcoreB
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,066
Shelby Twp. Mi
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Nice work Tony! Looks like decent access to plugs. Dracarys…… So far I'm liking what I see! these should pick-up your program!
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Re: Header thread
[Re: HardcoreB]
#3057197
07/07/22 03:50 PM
07/07/22 03:50 PM
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Joined: Jul 2018
Posts: 170 Sticky South
Rodenteliminator
member
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member
Joined: Jul 2018
Posts: 170
Sticky South
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I am watching this closely, where are you guys getting your 2 1/4 tubing kits I believe I am going to need that size for my low deck with 440-1 heads in a Bbody as of now I can do fenderwell or under chassis, any input will be appreciated. Thanks Doug
Sorry honey I spent the rent
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Re: Header thread
[Re: Rodenteliminator]
#3057346
07/08/22 07:23 AM
07/08/22 07:23 AM
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Joined: Jan 2003
Posts: 10,038 MN
JERICOGTX
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,038
MN
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where are you guys getting your 2 1/4 tubing kits I buy all my tubing from StainlessHeaders.com They are in Minnesota, but not close enough for me to drive there and pick up. Just easier to have them ship to my door, and never had a problem. i didn't buy a "kit" either. just figured out roughly what I needed for bends, and bought a bunch of U bends.
69 GTX
68 Road Runner
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Re: Header thread
[Re: JERICOGTX]
#3057347
07/08/22 07:44 AM
07/08/22 07:44 AM
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Joined: Aug 2003
Posts: 4,688 On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,688
On the parachute mount
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where are you guys getting your 2 1/4 tubing kits I buy all my tubing from StainlessHeaders.com They are in Minnesota, but not close enough for me to drive there and pick up. Just easier to have them ship to my door, and never had a problem. i didn't buy a "kit" either. just figured out roughly what I needed for bends, and bought a bunch of U bends. X2 on stainless headers. I didnt see what i wanted as far as a kit on their site, i called there and they built a kit for me. Quick shipping and great guys to deal with
....BAD A$$ STREET CAR.....
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Re: Header thread
[Re: Cab_Burge]
#3057541
07/08/22 10:22 PM
07/08/22 10:22 PM
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Joined: Jan 2003
Posts: 19,375 Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,375
Las Vegas
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IMO SPD is the best when it comes to header materials...Quality is next to none but price reflects that.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Header thread
[Re: n20mstr]
#3057586
07/09/22 03:27 AM
07/09/22 03:27 AM
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Joined: Jan 2003
Posts: 10,011 Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,011
Frostbitefalls MN (Rocky&Bullw...
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Dumb question...other than durability and $$$ is there any difference between stainless and mild steel ??? Oh and i have some A body big block headers for sale in the race parts section Stainless holds heat in the exhaust, which is energy, aiding in better scavenging without having to do what i do. Wrap them, since i build my own out of m. s. Also no rust buildup inside the tubes. That may cause some power loss at some point?
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Header thread
[Re: gregsdart]
#3058248
07/11/22 02:05 PM
07/11/22 02:05 PM
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Joined: Aug 2003
Posts: 4,688 On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,688
On the parachute mount
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Driver side tacked , the shorted tube ended up 18 , but the collector adds 2” (merge) so it’s within 6” of what it was supposed to be . I got the cyl in order to fire in a circle also , that helped because it added a few inches to #3
....BAD A$$ STREET CAR.....
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Re: Header thread
[Re: gregsdart]
#3058279
07/11/22 03:17 PM
07/11/22 03:17 PM
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Joined: Jan 2003
Posts: 10,038 MN
JERICOGTX
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,038
MN
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Dumb question...other than durability and $$$ is there any difference between stainless and mild steel ??? Oh and i have some A body big block headers for sale in the race parts section Stainless holds heat in the exhaust, which is energy, aiding in better scavenging without having to do what i do. Wrap them, since i build my own out of m. s. Also no rust buildup inside the tubes. That may cause some power loss at some point? Regular steel, coated, wrapped, or stainless, NONE of that stuff makes any difference in HP. Wrapped will keep heat down in the engine compartment, but it does't help make power.
69 GTX
68 Road Runner
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Re: Header thread
[Re: 440Jim]
#3062978
07/27/22 11:20 AM
07/27/22 11:20 AM
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Joined: Aug 2003
Posts: 4,688 On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,688
On the parachute mount
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That collector exit on the side of the car will look wicked. Maybe blow the hat off a bystander... LOL they will be trimmed way back. maybe just stick out 1" or so past the fender. We are not allowed bullhorns in Ultra street BUT whats going on inside the fender..... Really it wont be much, but its all i could get in the little real estate there is.
....BAD A$$ STREET CAR.....
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Re: Header thread
[Re: n20mstr]
#3062986
07/27/22 11:48 AM
07/27/22 11:48 AM
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Joined: Jan 2003
Posts: 19,375 Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,375
Las Vegas
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Nice tape Looking good.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Header thread
[Re: n20mstr]
#3063298
07/28/22 01:40 PM
07/28/22 01:40 PM
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Joined: Sep 2003
Posts: 19,480 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,480
north of coder
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mentioning bullhorns, what advantage do they serve ? i am asking this because i seem to be seeing more of them on fast cars. TIA for helping me to understand.
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Re: Header thread
[Re: moparx]
#3063313
07/28/22 02:20 PM
07/28/22 02:20 PM
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Joined: Jan 2003
Posts: 10,038 MN
JERICOGTX
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,038
MN
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mentioning bullhorns, what advantage do they serve ? i am asking this because i seem to be seeing more of them on fast cars. TIA for helping me to understand. Downforce. While not a lot, on a fast car, you take every bit of advantage you can to not get air under the car.
69 GTX
68 Road Runner
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Re: Header thread
[Re: moparx]
#3063372
07/28/22 04:55 PM
07/28/22 04:55 PM
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Joined: Aug 2003
Posts: 4,688 On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,688
On the parachute mount
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mentioning bullhorns, what advantage do they serve ? i am asking this because i seem to be seeing more of them on fast cars. TIA for helping me to understand. ON a car with no wheelie bars, they are supposed to add (from the exhaust velocity aimed up) almost 30lbs to the front, without carrying 30lbs if that makes sense. Helps keep the front down
Last edited by n20mstr; 07/28/22 04:55 PM.
....BAD A$$ STREET CAR.....
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Re: Header thread
[Re: n20mstr]
#3063604
07/29/22 12:45 PM
07/29/22 12:45 PM
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Joined: Sep 2003
Posts: 19,480 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,480
north of coder
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mentioning bullhorns, what advantage do they serve ? i am asking this because i seem to be seeing more of them on fast cars. TIA for helping me to understand. JericoGTX : Downforce. While not a lot, on a fast car, you take every bit of advantage you can to not get air under the car. n20mstr : ON a car with no wheelie bars, they are supposed to add (from the exhaust velocity aimed up) almost 30lbs to the front, without carrying 30lbs if that makes sense. Helps keep the front down thanks for helping me understand this guys !
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Re: Header thread
[Re: moparx]
#3064111
07/31/22 04:24 PM
07/31/22 04:24 PM
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Joined: Aug 2003
Posts: 43,228 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,228
Bend,OR USA
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When it comes to aerodynamics testing Mopar did a bunch of that using crepe paper strips on one of their test Dusters back in the mid 1970s filming it and then looking at each frame from the starting line to the finish line in the 1/4 mile. I've seen the same testing done on small racing airplanes the nose, fuselage, wings, rudder and tail designs all come into play on aerodynamic drag, I owned and flew a Piper 260 Comanche single engine 5 place airplane, it would average around 180 MPH indicated air speed straight and level on 60% full power above 9500 Ft. above sea level, the fuel consumption got a lot better the higher you flew do to needing to lean it out for the thinner air We were flying back to SO CA from visiting our grandkids in Seatle WA, we were above a cloud layer at 11,500 ft the outside air temps were right at 5 F, the ride was very smooth, and I was bored so I started playing around with prop pitch RPM, sliding my seat all the way back as far as it would go made the airplane speed up around 4 MPH Slowing the prop speed down from 2400 RPM to 2300 RPM picked up 12 MPH I ended up trying from 2000 RPM to 2600 RPM in 500 RPM increments, that airplane that day a in those weather at that altitude like 2300 RPM best. My message is to test before deciding on what will work versus what you may think will or won't work on our toys Lots of ways to slow down, not so many on making our cars and other toys faster, test, test and test some more
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Header thread
[Re: LA360]
#3064563
08/02/22 07:36 AM
08/02/22 07:36 AM
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Joined: Jan 2003
Posts: 2,926 A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,926
A shed in England
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Wow! educational, thanks !
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: Header thread
[Re: LA360]
#3067643
08/13/22 02:13 PM
08/13/22 02:13 PM
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Joined: Feb 2015
Posts: 2,079 CA
crackedback
top fuel
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top fuel
Joined: Feb 2015
Posts: 2,079
CA
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Turning them up to help with downforce, sure. It's free weight not subject to a those post race weighing thingies, scales. Turning them back to the rear to increase speed through additional thrust, I doubt it seriously has a positive effect. Drag vs thrust.
Last edited by crackedback; 08/13/22 02:15 PM.
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Re: Header thread
[Re: gregsdart]
#3069441
08/19/22 09:01 AM
08/19/22 09:01 AM
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Joined: Sep 2008
Posts: 656 Florida
CJD AUTOMOTIVE
mopar
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mopar
Joined: Sep 2008
Posts: 656
Florida
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Here is a set I built for my street/road race 'Cuda. It's a turbo car with 345's up front, so packaging is tight. I'm using the Victor heads, and no one makes a header flange I liked. I bought the Stainless Headers one and figured out it's just a copy of the .dxf file for the gasket. Decided to make my own (right one is the SH flange and left is mine): I had these water jet cut, and the port slug gave me an idea. I reduced the OD about .030", put a radius on the driven edge, and drilled a hole to attach a handle. This became my forming tool for the stubs. I formed the stub on the bench, inserted, and then formed it again in the flange. Worked out pretty good: I used the Lego's to layout about 10 different setup's. The goal was all primaries within 1/2" of each other, easy spark plug access, and be removable without pulling the engine! I finally got there, but damn... The other side was no easier, as I have the engine offset 1-1/2" to the passenger side.
Craig Scholl CJD Automotive, LLC Jacksonville, FL www.CJDAUTOMOTIVE.com904-400-1802 "I own a Mopar. I already know it won't be in stock, won't ship tomorrow, and won't fit without modification"
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Re: Header thread
[Re: CJD AUTOMOTIVE]
#3069442
08/19/22 09:04 AM
08/19/22 09:04 AM
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Joined: Sep 2008
Posts: 656 Florida
CJD AUTOMOTIVE
mopar
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mopar
Joined: Sep 2008
Posts: 656
Florida
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Couple more, hit the posting limit above.
Craig Scholl CJD Automotive, LLC Jacksonville, FL www.CJDAUTOMOTIVE.com904-400-1802 "I own a Mopar. I already know it won't be in stock, won't ship tomorrow, and won't fit without modification"
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Re: Header thread
[Re: CJD AUTOMOTIVE]
#3069448
08/19/22 09:28 AM
08/19/22 09:28 AM
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Joined: Jan 2003
Posts: 2,926 A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,926
A shed in England
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Couple more, hit the posting limit above. Wow !! Impressive stuff for sure, any pics of the whole project ?
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: Header thread
[Re: gregsdart]
#3069501
08/19/22 11:15 AM
08/19/22 11:15 AM
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Joined: Jan 2003
Posts: 16,928 NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,928
NC
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One side done, a couple pipes to fix on the other, then wrap that side. Getting close! Greg, Good to hear the progress. What didn't you like about the #1 and #7 tubes?
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Re: Header thread
[Re: CJD AUTOMOTIVE]
#3069503
08/19/22 11:17 AM
08/19/22 11:17 AM
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Joined: Jan 2003
Posts: 16,928 NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,928
NC
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Here is a set I built for my street/road race 'Cuda.
I had these water jet cut, and the port slug gave me an idea. I reduced the OD about .030", put a radius on the driven edge, and drilled a hole to attach a handle. This became my forming tool for the stubs. I formed the stub on the bench, inserted, and then formed it again in the flange. Worked out pretty good: Craig, Good job with forming the tubes.
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Re: Header thread
[Re: Tig]
#3070425
08/22/22 12:03 PM
08/22/22 12:03 PM
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Joined: Sep 2008
Posts: 656 Florida
CJD AUTOMOTIVE
mopar
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mopar
Joined: Sep 2008
Posts: 656
Florida
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Couple more, hit the posting limit above. Wow !! Impressive stuff for sure, any pics of the whole project ? I do, but all in weird stages. I'm about to get it off the table and will post up some with it together more. Her is a rendering I had done, not exact but close:
Craig Scholl CJD Automotive, LLC Jacksonville, FL www.CJDAUTOMOTIVE.com904-400-1802 "I own a Mopar. I already know it won't be in stock, won't ship tomorrow, and won't fit without modification"
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Re: Header thread
[Re: 440Jim]
#3070426
08/22/22 12:04 PM
08/22/22 12:04 PM
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Joined: Sep 2008
Posts: 656 Florida
CJD AUTOMOTIVE
mopar
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mopar
Joined: Sep 2008
Posts: 656
Florida
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.
Last edited by CJD AUTOMOTIVE; 08/23/22 09:01 AM. Reason: wrong person
Craig Scholl CJD Automotive, LLC Jacksonville, FL www.CJDAUTOMOTIVE.com904-400-1802 "I own a Mopar. I already know it won't be in stock, won't ship tomorrow, and won't fit without modification"
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Re: Header thread
[Re: 440Jim]
#3070535
08/22/22 05:17 PM
08/22/22 05:17 PM
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Joined: Sep 2008
Posts: 656 Florida
CJD AUTOMOTIVE
mopar
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mopar
Joined: Sep 2008
Posts: 656
Florida
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.
Last edited by CJD AUTOMOTIVE; 08/23/22 09:01 AM. Reason: wrong person
Craig Scholl CJD Automotive, LLC Jacksonville, FL www.CJDAUTOMOTIVE.com904-400-1802 "I own a Mopar. I already know it won't be in stock, won't ship tomorrow, and won't fit without modification"
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Re: Header thread
[Re: 440Jim]
#3070547
08/22/22 05:43 PM
08/22/22 05:43 PM
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Joined: Jan 2003
Posts: 10,011 Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,011
Frostbitefalls MN (Rocky&Bullw...
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Greg said he needs to "fix" #1 and #7 tubes. Jim, I didn't secure the collecters to pipes 3 &5 good enough, and the collecters slid down 1/2 inch while facing up 1& 7. So, they don't fit well, 🙄
Last edited by gregsdart; 08/22/22 05:44 PM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Header thread
[Re: CJD AUTOMOTIVE]
#3070711
08/23/22 10:37 AM
08/23/22 10:37 AM
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Joined: Jan 2003
Posts: 2,926 A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,926
A shed in England
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Couple more, hit the posting limit above. Wow !! Impressive stuff for sure, any pics of the whole project ? I do, but all in weird stages. I'm about to get it off the table and will post up some with it together more. Her is a rendering I had done, not exact but close: Looks very purposeful
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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