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Originally Posted by ProdigyCustoms
Actually the cam specs were not to bad. We are not looking to rotate the earth here, just make some good power.
As for HP loss.
10% to 15% is not always true. I have seen documented losses of way more then 15% right before my eyes, with engine dynoed, then wheel dynoed, then raced projects.
A few case and facts.
Case one. Michael's Prodigy. On a Friday afternoon at 96 degrees on the engine dyno it made 684HP, 2 days later, Sunday afternoon at 95 degrees it made 455HP at the wheels. This is a TKO, 3.73 car. Also, for performance reference. The following Saturday in Pigeon Forge we were running 97MPH trap speeds in the 1/8. Prodigy has since run 101MPH 1/8 mile traps spinning the tires. For reference, My street racer was running 99MPH in Pigeon Forge and runs 100MPH at the 1/8 mile on motor at home.
Case 2, My street racer. Made 645HP on motor on the engine dyno (a different engine dyno), made 414HP to the tires (same dyno as Prodigy). It is a automatic TH350. For reference, My street racer runs 10.70s, 126MPH in the quarter, 100MPH in the 1/8. Also, it made 635HP to the tires on nitrous, and run 9.30s @ 146MPH
Case 3, Parson Chevy 2, Made 635HP on the yet another different engine dyno, made 440HP on the same wheel dyno as prodigy and my Just bring It street racer. It is also a TKO, 3.73 car. Parsons car has not run a quarter, but I have some seat time. It will run right beside Prodigy, which is capable of 125MPH + trap speed if they would let us run it out the door. Also, on a roll, say 30MPH, all 3 of these cars would hang very close together as long as they all hooked up.
Is the dyno we are using soft? Maybe, but the street racer went to another wheel dyno and did 428HP, so no big gain dyno to dyno. So long story short, we do not sweat these numbers anymore. But we do not race dynos either.
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I don't dont these numbers and issues, but seat of the pants feel is that the car is no faster then it was with the stock zz430. I'm not sure about soft dyno's. What does that mean?