Every online horsepower calculator(about 5 or 6) that I've checked has calculated my RWHP@380-400 and flywheel HP @ 470-500. Lightning's curb weight is advertised @ 4670lbs. Add my big butt and gas and I round it off at 4900lbs. 13.573@101.08 1/4 time and speed. What am I missing?

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Red 99.5 Lightning,#0975,Born 5/6/99...Adopted 5/27/99 Chipped w/SuperChip Flipchip chip,Water Wetter, Mobil 1, 13.573@101.08

 

From what I can gather the 360 HP rating was an estimate. Ford seems to have under rated the power (insurance reasons?). I did find a dyno chart for one, and will see if I can find it again.

 

http://members.tripod.com/~LS1_PWR2/99SVT.jpg
this is a comparison between the 99 Cobra and 99 Lightning, both stock.



[This message has been edited by 98_SVT_COBRA (edited 10-17-1999).]

 

I've seen the different dyno's on them. What I was wondering is why the calculators are so different from the dyno's. I'm sure there is a reliable way to calculate this. It's just a matter of physic's to move a mass at time and speed. The only variable that I can think of that's not in the formulas is gear ratio.

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Red 99.5 Lightning,#0975,Born 5/6/99...Adopted 5/27/99 Chipped w/SuperChip Flipchip chip,Water Wetter, Mobil 1, 13.573@101.08

 

Gear ratio is one missing variable, but you should also consider drivetrain losses (Different in different platforms), traction, and no matter how much peak HP you make, your time is more based upon the amount of area under the curve. If you make say a peak of 20hp more than a person, but his power curve is broader, and ends up having more area beneath the curve, he'll probably run faster than you.

[This message has been edited by Typhoon (edited 10-17-1999).]