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: 2,849 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: 4,635 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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Joined: Aug 2008
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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: 4,635 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: 13,496 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, 4 speed, Dana 60 '71 Demon 340, no drivetrain, on blocks behind the barn '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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Joined: Aug 2008
Posts: 4,136 Mo.
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: 13,496 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
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Marion, South Carolina [><]
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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, 4 speed, Dana 60 '71 Demon 340, no drivetrain, on blocks behind the barn '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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Joined: Feb 2003
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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