Re: Exhaust system....
[Re: carter]
#2946917
07/25/21 10:54 AM
07/25/21 10:54 AM
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Joined: Oct 2015
Posts: 570 UK
rb446
mopar
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mopar
Joined: Oct 2015
Posts: 570
UK
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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
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Re: Exhaust system....
[Re: carter]
#2947655
07/27/21 05:24 AM
07/27/21 05:24 AM
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Joined: Oct 2015
Posts: 570 UK
rb446
mopar
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mopar
Joined: Oct 2015
Posts: 570
UK
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@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
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Re: Exhaust system....
[Re: carter]
#2947843
07/27/21 04:21 PM
07/27/21 04:21 PM
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Joined: May 2004
Posts: 12,418 Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,418
Taxes & Virus's R-US, NY
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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...
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Re: Exhaust system....
[Re: Dragula]
#2948021
07/28/21 08:15 AM
07/28/21 08:15 AM
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Joined: Jan 2003
Posts: 13,402 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,402
Marion, South Carolina [><]
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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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