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MustangGT0405 -> RE: Finally got a Whipple installed (4/23/2008 8:08:46 AM)
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Vista - Lots of variables there from motor to motor, but I gaurantee 519rwhp is not with a 10psi pulley. My assumption is that is at least a 12psi pulley. 475rwhp is seen alot with the Whipple HO at 10psi with an aggesive dyno tune. Most people pull it back and run a little rich to be safe. That is what puts you around 450rwhp. I am of the opinion that rwhp numbers arent the limiting factor for the motor. I think whatever power you can make at 10psi is the "safe" limit, ie after that you are playing with fire, will you get burned maybe, maybe not but the probability increases. My example is that if you are running 455rwhp with a bone stock manual trans stang with a Whipple HO and put on full exhaust and get to 480rwhp, you are at no more danger than you were at 455. Same car and you get an aggresive tune and get 480 that is riskier, or put an 12psi pulley and get 500 that is more risky still. I hope that makes sense. In the end if you want FI and plan to live in the 450-500rwhp range you should plan to potentially break a rod.
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