Does anyone know the formula for figuring hp from what I rn at the track.

 

http://www.dsm.org/tools/calchp.htm

 

http://www.speedworldmotorplex.com/calc.htm

 

Trucks are tough to figure out. Those Calcs are usually made for cars with a different frontal area and cd. They also don't take 4wd into account for those of us who run 4wd through the 1/4mile.

 

www.smokemup.com is pretty accurate when using trap speed, even for our trucks. I use that to check my dyno and track results all the time. You do need an accurate weight though.....

http://www.smokemup.com/auto_math/hp_mph.php

This is not too far off my last run on the dynojet:

You Entered:
Vehicle Weight - 7030 (lbs)
Trap Speed - 115.69 (mph)
Drivetrain Loss - 20 (%)

Results:
Rear Wheel HP - 739.1
Crankshaft HP - 923.9
Power to Weight (rwhp) - 9.5 (lower is better)
Power to Weight (crank hp) - 7.6 (lower is better)

 

every auto calculator you will ever need

http://www.wallaceracing.com/Calculators.htm

 

Thanks everybody.

 

Your HP computed from your 60 Foot Time of 2.02 at Weight of 5600 pounds is 1,144.95 HP. MUWHAAAA

 

I guess thats why they dont do dyno pulls in first gear. Who knows?