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05-19-2016
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#1 |
 Join Date: Jul 2005
Location: Jupiter, Fl.
Posts: 815
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Exhaust Backpressure- 3" vs. 2 1/2"
In case you still believe that old theory that "you need a little backpressure in that exhaust system to get the most out of your engine", check out this Hot Rod Network video of back to back dyno runs on a Hi-Po 454:
http://www.hotrod.com/news/1605-engi...-inch-exhaust/ They also address the issue of variation in overall weight.
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"It's about the car, not the people." 1991 ZR-1 White/Black #1236 (Owner since 1994). Stock engine with bolt-ons: Hurst shifter,"Forced Air" intake, Coplon duct, Bee Cool Radiator, Demon coils, Jeal prom, Watson headers, X pipe, 3" B&B's, Rippie flywheel, 4:10 gears, A molds, Toyo Proxes-R888's 12.06@117mph. 1.76 60ft. |
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