426 Hemi build want 600-650 hp any ideas.
#1131492
12/11/11 12:02 AM
12/11/11 12:02 AM
|
Joined: Jun 2008
Posts: 768 Maryville tn
67coronetman
OP
super stock
|
OP
super stock
Joined: Jun 2008
Posts: 768
Maryville tn
|
My friend is building a 426 hemi with stock stroke & only .030 over mild head work & intake to match the heads running a solid lift cam with ross pistons & manley rods what i want to know who out here can give real hemi combos that you have built that was still streetable on pump gas. We have the hemi books we wnt real world answer from you out here that have done it thanks for looking & any help.
Old car are me......
|
|
|
Re: 426 Hemi build want 600-650 hp any ideas.
[Re: astjp2]
#1131494
12/11/11 01:09 AM
12/11/11 01:09 AM
|
Joined: Jan 2003
Posts: 27,483 So Cal
autoxcuda
Too Many Posts
|
Too Many Posts
Joined: Jan 2003
Posts: 27,483
So Cal
|
Troy built a 472 with E-brock (MP) aluminum heads that very streetable. It's a Comp custom flat tappet with 112 centerline. He runs it with a Cross ram and 68 holley super stock carbs. Starts awesome. I went with a 40 mile round trip with him today in it. Here's video of it running. It's got cheapy glasspacks on it that dump down before the axle (as S/S where delivered that way). **Note from the videos inside the car that it has NO factory undercoating and NO seam sealer at all and NO backseat and just a thin carboard trunk divider. Also does not have aircleaners or even hood in videos. Without the rear seat you get a lot of trunk and undercar noise. Especially with no undercoating and seam sealer. http://www.youtube.com/watch?v=TDUcTidxlpghttp://www.youtube.com/watch?v=H9tYaB_D98Qhttp://www.youtube.com/watch?v=tIrU5pen-54http://www.youtube.com/watch?v=DzCXe5fk3Sc
|
|
|
Re: 426 Hemi build want 600-650 hp any ideas.
[Re: autoxcuda]
#1131495
12/11/11 01:19 AM
12/11/11 01:19 AM
|
Joined: May 2004
Posts: 12,418 Taxes & Virus's R-US, NY
Dragula
I Live Here
|
I Live Here
Joined: May 2004
Posts: 12,418
Taxes & Virus's R-US, NY
|
Mine is well over +700 on pump gas, but the cam I use can be a pain in the a$$ on parts and its +.060 and a 4.15 stroke. My heads flow right around 400cfm, and it makes the hp and the torque, just the spring pressures can be a pain.
My engine builder has one that is 657hp and is street driven runs 11.1s in a very heavy street car on drag radials and has a very mild cam, good flowing heads, and we have been kicked off the track for only having a lap belt and going over 122mph on that 11.1 pass. It is also a 4.15 stroke crank motor displacing 477 cubes.
My only 426 +.030 made about 580-590hp and was very streetable. The best street intake we have tested to date is the Ray Barton single plane...and around a 950 carb. The cam and heads will cost more than the stroker crank to make the hp and torque your looking for. I suggest going the stroker route....
Last edited by Dragula; 12/11/11 01:21 AM.
|
|
|
Re: 426 Hemi build want 600-650 hp any ideas.
[Re: MAVERICKSHEMI]
#1131497
12/12/11 03:13 AM
12/12/11 03:13 AM
|
Joined: Jan 2003
Posts: 2,648 USA
max
super gas
|
super gas
Joined: Jan 2003
Posts: 2,648
USA
|
|
|
|
Re: 426 Hemi build want 600-650 hp any ideas.
[Re: 3ddart]
#1131499
12/12/11 01:39 PM
12/12/11 01:39 PM
|
Joined: Jun 2008
Posts: 768 Maryville tn
67coronetman
OP
super stock
|
OP
super stock
Joined: Jun 2008
Posts: 768
Maryville tn
|
Thanks for the info this is what i am looking for my firend ( DON"T ) have the free cash to stroke it so he is leaving it all factory specs and getting the power other way but yet keeping the comp down for street gas i know someone out here has built one with all the motor parts i find it hard not to.!! Quote:
get hold of rich @ firecore wires (a moparts member and sponser) and get his combo and info. his car is close to 4000 lbs and he was clicking off 10.85s at norwalk this year @ the mopar event. i can't give you #s on mine but desk-top dyno said 625 hp. that's a .020 over 426 with stock stroke, mp alum heads with port clean up only with a crane hyd roller with 564 lift intake 555 lift exhaust (advertised lift, i got a little more with different ratio rockers), duration is 236 int and 240 ex @ 50. small 2" hedman headers with a new mp crossram and 2 holley 770 carbs. starts easy and other then idleing a bit high (900 rpm) it runs and drives nice. i but 450 miles on it from aug to oct and had very few issues. even got 9 mpg if i kept my foot out of it. most guys tend to think on a street car a single carb will make more hp. dave
Old car are me......
|
|
|
Re: 426 Hemi build want 600-650 hp any ideas.
[Re: 67coronetman]
#1131501
12/12/11 02:35 PM
12/12/11 02:35 PM
|
Joined: May 2004
Posts: 12,418 Taxes & Virus's R-US, NY
Dragula
I Live Here
|
I Live Here
Joined: May 2004
Posts: 12,418
Taxes & Virus's R-US, NY
|
Quote:
Thanks for the info this is what i am looking for my firend ( DON"T ) have the free cash to stroke it so he is leaving it all factory specs and getting the power other way but yet keeping the comp down for street gas i know someone out here has built one with all the motor parts i find it hard not to.!!
Quote:
get hold of rich @ firecore wires (a moparts member and sponser) and get his combo and info. his car is close to 4000 lbs and he was clicking off 10.85s at norwalk this year @ the mopar event. i can't give you #s on mine but desk-top dyno said 625 hp. that's a .020 over 426 with stock stroke, mp alum heads with port clean up only with a crane hyd roller with 564 lift intake 555 lift exhaust (advertised lift, i got a little more with different ratio rockers), duration is 236 int and 240 ex @ 50. small 2" hedman headers with a new mp crossram and 2 holley 770 carbs. starts easy and other then idleing a bit high (900 rpm) it runs and drives nice. i but 450 miles on it from aug to oct and had very few issues. even got 9 mpg if i kept my foot out of it. most guys tend to think on a street car a single carb will make more hp. dave
I believe his is stroked to 528 if I am not mistaken. Getting 650 out of a stockish hemi will require some money in the heads and probably more than the typical stroker....But if you have all the parts, get a hold of Ray Barton, RBRE, Tim Banning, FHO, or one of the other real good hemi builders out there and pick their brains a little. I have seen 800hp out of a +.030" hemi, but at 12.5:1 and lots of cam and head flow. 650 is doable on pump, but not cheap. I ran a tunnel ram on my 600hp hemi on the street, and still do. They like to breath. I think my next one after this 484 is going to be a 604 monster...Saw one at the drags this year, just awesome.
|
|
|
Re: 426 Hemi build want 600-650 hp any ideas.
[Re: 67coronetman]
#1131502
12/13/11 06:57 PM
12/13/11 06:57 PM
|
Joined: Sep 2006
Posts: 616 TP Exit 7, NJ, USA
DANA60
mopar
|
mopar
Joined: Sep 2006
Posts: 616
TP Exit 7, NJ, USA
|
This one dynoed at 670 @ 6000 on pump gas. 525 stroker, marine intake, 750 Holleys (600 bowls for fit), Stage V heads, Engle K-8 Hyd (248 @50, 586 lift), callis bottom end, ross 10.5-1 60 over.
|
|
|
Re: 426 Hemi build want 600-650 hp any ideas.
[Re: 3ddart]
#1131503
12/13/11 07:23 PM
12/13/11 07:23 PM
|
Joined: May 2004
Posts: 12,418 Taxes & Virus's R-US, NY
Dragula
I Live Here
|
I Live Here
Joined: May 2004
Posts: 12,418
Taxes & Virus's R-US, NY
|
Quote:
get hold of rich @ firecore wires (a moparts member and sponser) and get his combo and info. his car is close to 4000 lbs and he was clicking off 10.85s at norwalk this year @ the mopar event. i can't give you #s on mine but desk-top dyno said 625 hp. that's a .020 over 426 with stock stroke, mp alum heads with port clean up only with a crane hyd roller with 564 lift intake 555 lift exhaust (advertised lift, i got a little more with different ratio rockers), duration is 236 int and 240 ex @ 50. small 2" hedman headers with a new mp crossram and 2 holley 770 carbs. starts easy and other then idleing a bit high (900 rpm) it runs and drives nice. i but 450 miles on it from aug to oct and had very few issues. even got 9 mpg if i kept my foot out of it. most guys tend to think on a street car a single carb will make more hp. dave
I received a PM from him today, and his is a stroker hemi...His comes in at 472 cubes.
|
|
|
Re: 426 Hemi build want 600-650 hp any ideas.
[Re: 67coronetman]
#1131504
12/13/11 07:32 PM
12/13/11 07:32 PM
|
Joined: Apr 2005
Posts: 15,134 Kelowna, B.C. Canada
DPelletier
I Live Here
|
I Live Here
Joined: Apr 2005
Posts: 15,134
Kelowna, B.C. Canada
|
I would tend to think it would be pretty hard to get 600 - 650hp out of a stock stroke street hemi while still being streetable and able to run on pump swill. A factory race hemi grossed out in the 550ish range with headers IIRC.
I think your friend needs to;
- pony up and stroke it - give up being streetable and pump gas friendly or - lower hp expectations to something more reasonable; maybe 500 - 550hp
Dave
1970 Super Bee 440 Six Pack
1974 'Cuda
2008 Ram 3500 Diesel
2006 Ram 3500 Diesel
2004.5 Ram 2500 Diesel
2003 Ram 3500 Diesel
2006 Durango Limited
[url] http://1970superbee.piczo.com [/url]
|
|
|
Re: 426 Hemi build want 600-650 hp any ideas.
[Re: DPelletier]
#1131505
12/13/11 10:06 PM
12/13/11 10:06 PM
|
Joined: Jun 2008
Posts: 768 Maryville tn
67coronetman
OP
super stock
|
OP
super stock
Joined: Jun 2008
Posts: 768
Maryville tn
|
If he could he would.! I just don't see how he can't get that hp. ?? i have a 440 stock stroke .040 over stock crank & rods with cheap kb pistons & Indy SR head with a very mild port job M-1 intake no port work at all & 950 carb with a solid lift cam 282/292 & 540/559 lift with 1.6 Indy roller rockers & TTI headers and i am making 580 hp & Tq at the same & i had it Dynoed so its not a guess HP motor.! *** So you are saying a hemi with better heads & bigger Valves better rod & pistons and a roller cam set up and head work & intake work with good headers won't out do mine. ?? *** Quote:
I would tend to think it would be pretty hard to get 600 - 650hp out of a stock stroke street hemi while still being streetable and able to run on pump swill. A factory race hemi grossed out in the 550ish range with headers IIRC.
I think your friend needs to;
- pony up and stroke it - give up being streetable and pump gas friendly or - lower hp expectations to something more reasonable; maybe 500 - 550hp
Dave
Old car are me......
|
|
|
Re: 426 Hemi build want 600-650 hp any ideas.
[Re: 67coronetman]
#1131506
12/13/11 11:31 PM
12/13/11 11:31 PM
|
Joined: May 2004
Posts: 12,418 Taxes & Virus's R-US, NY
Dragula
I Live Here
|
I Live Here
Joined: May 2004
Posts: 12,418
Taxes & Virus's R-US, NY
|
Quote:
If he could he would.! I just don't see how he can't get that hp. ?? i have a 440 stock stroke .040 over stock crank & rods with cheap kb pistons & Indy SR head with a very mild port job M-1 intake no port work at all & 950 carb with a solid lift cam 282/292 & 540/559 lift with 1.6 Indy roller rockers & TTI headers and i am making 580 hp & Tq at the same & i had it Dynoed so its not a guess HP motor.!
*** So you are saying a hemi with better heads & bigger Valves better rod & pistons and a roller cam set up and head work & intake work with good headers won't out do mine. ?? ***
Quote:
I would tend to think it would be pretty hard to get 600 - 650hp out of a stock stroke street hemi while still being streetable and able to run on pump swill. A factory race hemi grossed out in the 550ish range with headers IIRC.
I think your friend needs to;
- pony up and stroke it - give up being streetable and pump gas friendly or - lower hp expectations to something more reasonable; maybe 500 - 550hp
Dave
You can get the 650hp out of it, but your going to end up paying Barton or FHO for some work on the heads, and pony up for a roller cam that may or may not meet your criteria of streetable. The mild strokers get away with a mild solid cam and stock heads and make that number easily. My 484 is making about 100 more than that, is very streetable, but the cam tends to wear on the valve train parts..My engine builder went the reliable as the shop truck route on the cam with the same size engine as mine, 10:1 compression instead of my 11.6:1 and stock flowing heads, vs. my 400cfm heads, and he is right at 657hp at 484 cubes.
Last edited by Dragula; 12/13/11 11:34 PM.
|
|
|
Re: 426 Hemi build want 600-650 hp any ideas.
[Re: Dragula]
#1131511
12/14/11 03:16 PM
12/14/11 03:16 PM
|
Joined: Apr 2005
Posts: 15,134 Kelowna, B.C. Canada
DPelletier
I Live Here
|
I Live Here
Joined: Apr 2005
Posts: 15,134
Kelowna, B.C. Canada
|
Quote:
[..My engine builder went the reliable as the shop truck route on the cam with the same size engine as mine, 10:1 compression instead of my 11.6:1 and stock flowing heads, vs. my 400cfm heads, and he is right at 657hp at 484 cubes.
more good info.
So 426/484 = .88 x 657 = 578hp out of a similarly built 426 (a little simplistic, but close enough).....makes perfect sense to me.
Dave
1970 Super Bee 440 Six Pack
1974 'Cuda
2008 Ram 3500 Diesel
2006 Ram 3500 Diesel
2004.5 Ram 2500 Diesel
2003 Ram 3500 Diesel
2006 Durango Limited
[url] http://1970superbee.piczo.com [/url]
|
|
|
|
|