Re: Horsepower limits with 2.125" hemi TTI headers & 3" exhaust
[Re: Uncle Barry]
#2495945
05/14/18 01:32 PM
05/14/18 01:32 PM
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Joined: Oct 2004
Posts: 2,833 Connecticut
FurryStump
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Change mufflers. With small block I picked up 2-3 tenths going from those to pypes racepros, but any straight through muffler is going to be better.
Last edited by FurryStump; 05/14/18 01:32 PM.
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Re: Horsepower limits with 2.125" hemi TTI headers & 3" exhaust
[Re: Uncle Barry]
#2496013
05/14/18 03:16 PM
05/14/18 03:16 PM
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Joined: Jan 2004
Posts: 4,573 Motor City
6PKRTSE
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I also run the 2-1/8" X 3" B/E Body Super Comps on my 528" Hemi in my 70' Challenger. I figured it was the choking point on my engine but it still made great power for a street engine. On spray they may be my limiting factor but I do plan on going to some custom bigger dia step headers eventually. I added themocouples & O2 bungs to mine for tuning while on dyno & in the car.
Last edited by 6PKRTSE; 05/14/18 03:18 PM.
1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.
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Re: Horsepower limits with 2.125" hemi TTI headers & 3" exhaust
[Re: an8sec70cuda]
#2496206
05/14/18 11:16 PM
05/14/18 11:16 PM
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racerx
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I went 9.49 on some tti 2 1/8 and 3"pipes w/two chamber flowmasters. I bet it'd be close to two tenths quicker w/ something less restrictive though. A pro stocker would probably run 7s w/ some Super Turbos on it. Does that mean super turbos are gonna work good for a 9 sec car since they went 7s on something real fast? They're still horribly restrictive. normally I run the 3.5 pipes w/bullets., I put these on for something else(can't remember what tho.)but decided to make a pass and was surprise at the et can't remember the mph.
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Re: Horsepower limits with 2.125" hemi TTI headers & 3" exhaust
[Re: Uncle Barry]
#2496464
05/15/18 02:37 PM
05/15/18 02:37 PM
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Joined: Jan 2004
Posts: 4,573 Motor City
6PKRTSE
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3-1/2" Bullets on mine also.
1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.
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Re: Horsepower limits with 2.125" hemi TTI headers & 3" exhaust
[Re: Uncle Barry]
#2496527
05/15/18 04:48 PM
05/15/18 04:48 PM
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OUTLAWD
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I picked up 0.4 in the 1/4 in a well sorted mid 11 sec car by going from TTI 3" H-pipe system with 2 chambers to 3.5" x-pipe with straight through mufflers dumping before the axle...EFI took care of the jetting for me, lol.
While it might be quicker with a larger exhaust, is it worth it if it is a true street car?
Faster, Faster until the thrill of speed overcomes the fear of death...
71 Swinger - slowly collecting dust/parts 66 Belv. II - just a streetcar 88 Mustang - turbo LS beater
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Re: Horsepower limits with 2.125" hemi TTI headers & 3" exhaust
[Re: OUTLAWD]
#2496530
05/15/18 04:55 PM
05/15/18 04:55 PM
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Joined: Jan 2003
Posts: 13,375 Marion, South Carolina [><]
an8sec70cuda
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I Live Here
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While it might be quicker with a larger exhaust, is it worth it if it is a true street car? Yes.
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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Re: Horsepower limits with 2.125" hemi TTI headers & 3" exhaust
[Re: an8sec70cuda]
#2496687
05/15/18 11:04 PM
05/15/18 11:04 PM
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hustlin hoosier
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We run 2.125 TTI headers 1230 hp 5.0 on 26's at 142 mph NA 173 @ 8.0 1/4. 565 inches, 9300 rpm going thru the traps in the quarter.
Last edited by hustlin hoosier; 05/15/18 11:06 PM.
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Re: Horsepower limits with 2.125" hemi TTI headers & 3" exhaust
[Re: hustlin hoosier]
#2496751
05/16/18 03:33 AM
05/16/18 03:33 AM
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Dave Hall
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We run 2.125 TTI headers 1230 hp 5.0 on 26's at 142 mph NA 173 @ 8.0 1/4. 565 inches, 9300 rpm going thru the traps in the quarter. Wow! That's bookin'! I think this answers the header question...
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Re: Horsepower limits with 2.125" hemi TTI headers & 3" exhaust
[Re: Dave Hall]
#2496757
05/16/18 07:29 AM
05/16/18 07:29 AM
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racerx
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We run 2.125 TTI headers 1230 hp 5.0 on 26's at 142 mph NA 173 @ 8.0 1/4. 565 inches, 9300 rpm going thru the traps in the quarter. Wow! That's bookin'! I think this answers the header question... True dat.......wondering if it's can benefit from a bigger header?
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Re: Horsepower limits with 2.125" hemi TTI headers & 3" exhaust
[Re: Dave Hall]
#2496780
05/16/18 10:41 AM
05/16/18 10:41 AM
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Uncle Barry
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We run 2.125 TTI headers 1230 hp 5.0 on 26's at 142 mph NA 173 @ 8.0 1/4. 565 inches, 9300 rpm going thru the traps in the quarter. Wow! That's bookin'! I think this answers the header question... I agree
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Re: Horsepower limits with 2.125" hemi TTI headers & 3" exhaust
[Re: racerx]
#2496783
05/16/18 10:46 AM
05/16/18 10:46 AM
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Joined: Jan 2003
Posts: 13,375 Marion, South Carolina [><]
an8sec70cuda
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I Live Here
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We run 2.125 TTI headers 1230 hp 5.0 on 26's at 142 mph NA 173 @ 8.0 1/4. 565 inches, 9300 rpm going thru the traps in the quarter. Wow! That's bookin'! I think this answers the header question... True dat.......wondering if it's can benefit from a bigger header? My thoughts exactly. It is crazy fast, but has it ever been tested w/ a bigger header? I don't think I've ever seen an engine making that kind of power w/ that small a header on it. IMO the OP's car is just fine w/ the 2 1/8" header and likely would see no improvement w/ a 2 1/4". The mufflers he's running are the restriction.
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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Re: Horsepower limits with 2.125" hemi TTI headers & 3" exhaust
[Re: hustlin hoosier]
#2497053
05/17/18 01:35 AM
05/17/18 01:35 AM
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Joined: Jul 2004
Posts: 1,145 Arizona, USA
gsmopar
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We run 2.125 TTI headers 1230 hp 5.0 on 26's at 142 mph NA 173 @ 8.0 1/4. 565 inches, 9300 rpm going thru the traps in the quarter. What's the collector size?
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Re: Horsepower limits with 2.125" hemi TTI headers & 3" exhaust
[Re: an8sec70cuda]
#2497259
05/17/18 04:54 PM
05/17/18 04:54 PM
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Posts: 1,942 Metro Detroit
OUTLAWD
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While it might be quicker with a larger exhaust, is it worth it if it is a true street car? Yes. Obviously!
Faster, Faster until the thrill of speed overcomes the fear of death...
71 Swinger - slowly collecting dust/parts 66 Belv. II - just a streetcar 88 Mustang - turbo LS beater
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