Quote:
Originally Posted by Cobra #3170
I am sure you are correct, Whipple kept telling me they were going to develop a carbon fiber air box that would solve all problems and I waited and waited. They never made one. Car made 862 rwhp which was more than enough for most road courses but a better air box would have been nice. Did you install fuel pump boosters?
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Yes, JMS brand. I had the GT Guys do the install last year just before Rally X, when I needed some service done anyway. Along the Whipple, did injectors, Accufab throttle body, Cooltech exhaust, new SPEC clutch, lowered 1 inch, SpeedHut gauges (originals working, safely packed away), all fluids flushed and changed, new belts, etc. Did 754 rwhp on 100 octane and 19 psi boost. But I am not impressed with their tune- very safe/rich. Once I get the intake improved, I expect 780-800 rwhp on pump gas. My GT500 with a 3.4 Whipple makes 751 rwhp on same fuel, same boost, so the GT should do at least as well with the 4.0 Whipple, considering it has more cam, more fuel and injector capacity, less driveline loss, etc. But now I am doing a total rebuild on my GT500 engine, including cams, so it is a constant horsepower war between these two in my garage. But my cross-ram 572 hemi trumps them both.