Qtr mile or ENGINE dyno results

Uhcoog1 said

Wallace uses rear wheel hp. Compare these two, they use the same formula.




http://robrobinette.com/et.htm
http://www.wallaceracing.com/et-hp-mph.php

The Hemi lx cars don't fit the formula.

You can use the formula to compare your power to the ground vs an lx power to the ground, but realize the output 'hp' numbers probably aren't correct. Also, given you have a different tranny, it's not going to be a spot on comparison (lx's have more gears, thus tighter rpm band used, though probably more driveline loss).



if you're looking at trap speed, then drivetrain loss always matters.

Click to expand...

If Wallace uses RW HP, then it is way off (which it hasn't been for me using FW HP), it says my car runs 10:01 @ 135 MPH, It runs 9:40 @ 142 MPH

If you use robrobinette It says it runs 9:72,by plugging in FW HP, if you plug in RW HP, it then says 10:01

Just sayin' I am using real world E.T. & MPH numbers including a RW HP chassis dyno number.

17% is way too conservative, it is in the mid 20's some where, depending on mainly converter loss.But again, there is no real formula.

This info has worked on 3 different cars for me, with different combo's