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when you convert to flywheel HP... (archive)

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Posted by PM3 on January 29, 2001 at 23:02:22:

In Reply to: Post G-tech results! Here's mine... posted by Mitchell on January 29, 2001 at 16:31:05:

I input 3500lbs for weight because I have a ton of stereo equipment as well as a harness bar. Instructions say GVWR-180lbs
for each missing passenger. The G-tech spit out an average of 252rwhp(252*15%=290hp) and that seems accurate. The last
time at the dyno I got 254rwhp so it seems to be spot on! As for my 0-60mph I got an average of 5.6sec but with lots of
wheel-spin. I should be able to shave off a few tenths if I hook up better. I couldn't get a 1/4mile because there are too many
friggin police cars around. Oh well. What's everyone else getting?

Dinan 3

it's actually the other way around. There's a % loss to the wheels. So, if it's fifteen, you can't just tack back on 15% of the rear wheel HP. Instead you must subtract 15% from the flywheel HP, since it is a loss FROM the engine, TO the wheels. In this case, at a 15% loss you'd divide your 254rwHP by (1-15%), or: 254/0.85=296.5

Then from there you can go 15% loss to wheels, in other words, figure out what is 85% of your HP now: 296x.85=254 to the wheels. Hope this helped. Sounds like you have a nice car..CYA>PM3

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