The calculation is not 115% x rwhp. When you have 15% drivetrain loss, you multiply (1-.15) or .85 by the crank horsepower to get RWHP. So .85 x CrankHP = RWHP. Rewrite the equation to solve for CrankHP; CrankHP= RWHP/.85 So to solve for crank using RWHP, you divide by .85 (assuming 15% drivetrain loss).
424rwhp/.85 = 498.8 crank HP
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05 Redfire GT: WHIPPLE HO @ 10psi, VMP dyno tune & other goodies - stock block, stock exhaust, stock 3.55s
11.324 @ 121.84 w/ 1.627
http://www.youtube.com/watch?v=dlBxdF5IqFM
11.36 @ 122.72 w/ 1.663
http://www.youtube.com/watch?v=BoGf6DiMVk4
Previous runs:
CAI+tune only 12.877 @ 106.79 w/ 1.819
CAI+tune+suspension 12.783 @ 108.05 w/ 1.841
both on stock tires
Please do not link companies in your sig
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