RX7Club.com - Mazda RX7 Forum - 528 rwhp 428 ft/lbs, 24 psi, pump gas and WI

Quote:

Originally Posted by silverfdturbo6port (Post 11039989)

well yea to make over 100hp and only gain 3mph..? And how do you figure that 60' dont make a difference. if you bog and have no boost for 30' then you loose that much track to gain speed. And even at that if you use the so called hp calculator to compare to a dyno Tom94rx-7 still has not hit over 500hp according to the calculator, but we all know that its making 528hp or more. Most dont realize that to get a hp# calculation based on the track run IT HAS TO BE A PERFECT RUN
My last run on 18psi i trapped 120. guess that makes the car like 300hp hehe. never the less i will sort it all out this spring and summer on the dynojet

It doesn't have to be a perfect run. If you bog your car it doesn't make a 10mph difference like people seem to think. Its a few mph at best unless you have a
GT42r and are the worst driver in the world. :lol: Just because a car makes xxxwhp on the dyno doesn't mean its making that going down the track. If your tune is bad it can be pulling timing which will kill your MPH. It can be fine on the dyno for one quick pull but on the street/track its a different story. I have had a dynojet for over 12yrs and everycar that comes off the dyno I can tell within a few mph what the trap speed will be. If I take those same cars and put there timeslip info and weight into the horsepower calculator its pretty damn accurate. Not when using the ET method but only when using the trap speed method.