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Exhaust system.... #2946876 07/25/21 09:34 AM 07/25/21 09:34 AM
Joined: Oct 2006 Posts: 89 sweden C carter OP member
carter OP member C Joined: Oct 2006 Posts: 89 sweden	I have 1 7/8" headers and full 3" exhaust system, both from TTI on my 512. I'm little curios howe much HP it can support.... Howe fast have you gays bin with your street car and a full 3" system...... Yes, all the way to your bumper.

Re: Exhaust system.... [Re: carter] #2946879 07/25/21 09:47 AM 07/25/21 09:47 AM
Joined: Oct 2007 Posts: 1,070 Big Western Pencilveinya U Uncle Barry super stock
Uncle Barry super stock U Joined: Oct 2007 Posts: 1,070 Big Western Pencilveinya	I have 2 1/8 TTI's with 3.5" collector and 3" to the bumper and been 10.90s in my 528. Really mild hemi. Nice and quiet too.

Re: Exhaust system.... [Re: Uncle Barry] #2946897 07/25/21 10:13 AM 07/25/21 10:13 AM
Joined: Oct 2006 Posts: 89 sweden C carter OP member
carter OP member C Joined: Oct 2006 Posts: 89 sweden	Originally Posted by Uncle Barry I have 2 1/8 TTI's with 3.5" collector and 3" to the bumper and been 10.90s in my 528. Really mild hemi. Nice and quiet too. Thats my goal 6.9 / 10.9s ..... Well done..

Re: Exhaust system.... [Re: carter] #2946917 07/25/21 10:54 AM 07/25/21 10:54 AM
Joined: Oct 2015 Posts: 570 UK rb446 mopar
rb446 mopar Joined: Oct 2015 Posts: 570 UK	Not too similar to your combo but we have been a best of 10.35@130 with our 3800lb '69RR, 2.1/8" TTI's, 4" collectors and only 2.1/2" pipes to the bumper...motor is a mild 10:1CR 589ci wedge, dyno'd@695hp, track hp with mechanical w/pump/alternator full exhaust, we lost approx 20hp Last edited by rb446; 07/25/21 10:56 AM. 1969 'Cuda 446ci, best 9.96@133.9 in 1990 1971 340 'Cuda, best 11.01@122.8 in 1987

Re: Exhaust system.... [Re: carter] #2946928 07/25/21 11:14 AM 07/25/21 11:14 AM
Joined: Oct 2007 Posts: 1,070 Big Western Pencilveinya U Uncle Barry super stock
Uncle Barry super stock U Joined: Oct 2007 Posts: 1,070 Big Western Pencilveinya	Originally Posted by carter Originally Posted by Uncle Barry I have 2 1/8 TTI's with 3.5" collector and 3" to the bumper and been 10.90s in my 528. Really mild hemi. Nice and quiet too. Thats my goal 6.9 / 10.9s ..... Well done.. https://youtu.be/Njgx1qtgu1E

Re: Exhaust system.... [Re: carter] #2946998 07/25/21 02:22 PM 07/25/21 02:22 PM
Joined: Aug 2003 Posts: 43,095 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,095 Bend,OR USA	My old pump gas duster ran a set of Headman fender well A body headers with 2.0 primary pipes with 3.5 inch collectors going into a 3.0 inch system to the Magnaflow 14x7 oval muffs mounted behind the rear end, it went 9.993 at 134.8 MPH on Oregon pump swill with the air cleaner and exhaust system on using 91 octane Oregon pump swill It weighed 3450 lbs. with me in the car I did remove the pipes and muffs from the collector back at our local 1/8 mile track and it pick up from 7.01 to 6.98 ET and .2 MPH, not worth taking it off Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Exhaust system.... [Re: Cab_Burge] #2947041 07/25/21 04:36 PM 07/25/21 04:36 PM
Joined: Oct 2006 Posts: 89 sweden C carter OP member
carter OP member C Joined: Oct 2006 Posts: 89 sweden	Originally Posted by Cab_Burge My old pump gas duster ran a set of Headman fender well A body headers with 2.0 primary pipes with 3.5 inch collectors going into a 3.0 inch system to the Magnaflow 14x7 oval muffs mounted behind the rear end, it went 9.993 at 134.8 MPH on Oregon pump swill with the air cleaner and exhaust system on using 91 octane Oregon pump swill It weighed 3450 lbs. with me in the car I did remove the pipes and muffs from the collector back at our local 1/8 mile track and it pick up from 7.01 to 6.98 ET and .2 MPH, not worth taking it off So your exhaust system don't hold you back, a real test

Re: Exhaust system.... [Re: carter] #2947093 07/25/21 07:50 PM 07/25/21 07:50 PM
Joined: Feb 2006 Posts: 288 no mans land R racerbychoice enthusiast
racerbychoice enthusiast R Joined: Feb 2006 Posts: 288 no mans land	What kind of car is it going on? Any pics to share?

Re: Exhaust system.... [Re: racerbychoice] #2947179 07/25/21 11:27 PM 07/25/21 11:27 PM
Joined: Oct 2006 Posts: 89 sweden C carter OP member
carter OP member C Joined: Oct 2006 Posts: 89 sweden	If it`s me you mean? It`s my street car that I take to a track once or twice a year. I don't know if I have enough power to go 6.9x in a 1/8 track. It weight 3860 lbs with me in and best is 7.19 and 98.3 MPH... 60 feet is typisch 1.65-70

Re: Exhaust system.... [Re: carter] #2947186 07/25/21 11:49 PM 07/25/21 11:49 PM
Joined: Aug 2003 Posts: 43,095 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,095 Bend,OR USA	Focus on making it 60 ft. better first . .02 increase in the 60 will make it go .05 to .07 better in the 1/8 and 1/4 mile depending on your motor and shift points Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Exhaust system.... [Re: Cab_Burge] #2947651 07/27/21 04:10 AM 07/27/21 04:10 AM
Joined: Oct 2006 Posts: 89 sweden C carter OP member
carter OP member C Joined: Oct 2006 Posts: 89 sweden	Originally Posted by Cab_Burge Focus on making it 60 ft. better first . .02 increase in the 60 will make it go .05 to .07 better in the 1/8 and 1/4 mile depending on your motor and shift points My home track has a lot of No Prep events ( Yes! it is crap) so there is no bite at all. I have order a set of DA shocks up front and 1" taller rear tires so I maybe slow it down a little in 60 feet. I guess I don't gona see a much diffrence in 60 feet, but I run out of ideas Is my 98,3 MPH enough to go a 6,9x on a 1/8 track?

Re: Exhaust system.... [Re: carter] #2947655 07/27/21 05:24 AM 07/27/21 05:24 AM
Joined: Oct 2015 Posts: 570 UK rb446 mopar
rb446 mopar Joined: Oct 2015 Posts: 570 UK	@3860 what your trying to achieve would look like this with a hook> Power to Weight Ratio: 0.15 : 1 (HP per 1 Pound Weight) 60 Foot E.T. : 1.53 Seconds 1/8 Mile E.T. : 6.93 Seconds 1/8 Mile Trap Speed : 98.10 MPH 1/4 Mile E.T. : 10.98 Seconds as said your 60ft needs a lot of work and with what looks to me like street tyres? it ain't happening, hp is there in the mph. Last edited by rb446; 07/27/21 07:01 AM. 1969 'Cuda 446ci, best 9.96@133.9 in 1990 1971 340 'Cuda, best 11.01@122.8 in 1987

Re: Exhaust system.... [Re: rb446] #2947731 07/27/21 10:46 AM 07/27/21 10:46 AM
Joined: May 2004 Posts: 12,383 Taxes & Virus's R-US, NY Dragula I Live Here
Dragula I Live Here Joined: May 2004 Posts: 12,383 Taxes & Virus's R-US, NY	My Cuda in full "Street" trim, goes 9.89 at 134mph....I run Hooker headers 2.25 tubes to 3.5" collectors shrunk down to 3" exhaust and 3" flow masters....No x pipe.... 60ft is a 1.33 so far....on DOT "tires"... Take the mufflers and exhaust off and open it to 3.5" wide open....Same ET. '70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft) https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car) https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car) https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9) '66 Barracuda AWB Stretched nose Blown 440 Car in build stage '71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph https://www.youtube.com/watch?v=Znuo3jMUXTk

Re: Exhaust system.... [Re: Dragula] #2947801 07/27/21 01:52 PM 07/27/21 01:52 PM
Joined: Sep 2003 Posts: 19,305 north of coder moparx "Butt Crack Bob"
moparx "Butt Crack Bob" Joined: Sep 2003 Posts: 19,305 north of coder	would there be any gain if the 3 1/2" collector size used around 18-20" of 3 1/2" pipe before necking down to 3" at the X or H pipe, then 3" the rest of the way ? think collector extensions.

Re: Exhaust system.... [Re: rb446] #2947818 07/27/21 02:38 PM 07/27/21 02:38 PM
Joined: Oct 2006 Posts: 89 sweden C carter OP member
carter OP member C Joined: Oct 2006 Posts: 89 sweden	Originally Posted by rb446 @3860 what your trying to achieve would look like this with a hook> Power to Weight Ratio: 0.15 : 1 (HP per 1 Pound Weight) 60 Foot E.T. : 1.53 Seconds 1/8 Mile E.T. : 6.93 Seconds 1/8 Mile Trap Speed : 98.10 MPH 1/4 Mile E.T. : 10.98 Seconds as said your 60ft needs a lot of work and with what looks to me like street tyres? it ain't happening, hp is there in the mph. I guess a 60ft in 1.55 range is possible on a good / prep track. Tyres is now Hoosier QTP 28" tall. Yes! I have to work with 60ft if this should be true

Re: Exhaust system.... [Re: Dragula] #2947821 07/27/21 02:47 PM 07/27/21 02:47 PM
Joined: Oct 2006 Posts: 89 sweden C carter OP member
carter OP member C Joined: Oct 2006 Posts: 89 sweden	Originally Posted by Dragula My Cuda in full "Street" trim, goes 9.89 at 134mph....I run Hooker headers 2.25 tubes to 3.5" collectors shrunk down to 3" exhaust and 3" flow masters....No x pipe.... 60ft is a 1.33 so far....on DOT "tires"... Take the mufflers and exhaust off and open it to 3.5" wide open....Same ET. It seems that a full 3" exhaust is capable to support big motors and HP, so I don't have to worry about that....

Re: Exhaust system.... [Re: carter] #2947843 07/27/21 04:21 PM 07/27/21 04:21 PM
Joined: May 2004 Posts: 12,383 Taxes & Virus's R-US, NY Dragula I Live Here
Dragula I Live Here Joined: May 2004 Posts: 12,383 Taxes & Virus's R-US, NY	Originally Posted by carter Originally Posted by Dragula My Cuda in full "Street" trim, goes 9.89 at 134mph....I run Hooker headers 2.25 tubes to 3.5" collectors shrunk down to 3" exhaust and 3" flow masters....No x pipe.... 60ft is a 1.33 so far....on DOT "tires"... Take the mufflers and exhaust off and open it to 3.5" wide open....Same ET. It seems that a full 3" exhaust is capable to support big motors and HP, so I don't have to worry about that.... I think the muffler matters more than going to bigger than 3"...Personally, the best sounding and best performance mufflers I like are the Spintech ones with their oval exhaust. Get the best of both worlds... '70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft) https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car) https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car) https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9) '66 Barracuda AWB Stretched nose Blown 440 Car in build stage '71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph https://www.youtube.com/watch?v=Znuo3jMUXTk

Re: Exhaust system.... [Re: Dragula] #2948021 07/28/21 08:15 AM 07/28/21 08:15 AM
Joined: Jan 2003 Posts: 13,345 Marion, South Carolina [><] an8sec70cuda I Live Here
an8sec70cuda I Live Here Joined: Jan 2003 Posts: 13,345 Marion, South Carolina [><]	Originally Posted by Dragula My Cuda in full "Street" trim, goes 9.89 at 134mph....I run Hooker headers 2.25 tubes to 3.5" collectors shrunk down to 3" exhaust and 3" flow masters....No x pipe.... 60ft is a 1.33 so far....on DOT "tires"... Take the mufflers and exhaust off and open it to 3.5" wide open....Same ET. That is surprising. Mine doesn't seem to like mufflers...atleast not much of one. Runs best w/ 4" race Bullets right off the collectors. My headers have 4" collectors though. Open headers runs about the same, but the 60 foot is slightly softer. My H pipe system is really heavy though, so I'm sure part of the gain is from weight loss. CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax

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