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Re: Back Pressure
The 4 cyl does need back pressure, but how much and how do you measure it I don't know. A stock type exhaust provides enough, but a real free flow low restriction one doesn't. This comes from personal observations and things I've read, FWIW.
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84 4Runner - ARBed 5.29s F&R, 4.7 & 2.28 t-cases, Chevys, AP x-over, BudBuilt x-member, 2" drv trn lift, 36" TSLs, 30 spline Longs
80 something p/u - Buick 231 V6/TH-350 trans, Holley 4 bbl, Weiand intake, dual batts, dual tanks ...
89 4Runner - stock
2000 Isuzu Trooper + 2010 Sonata
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11-08-2007, 04:01 PM
