Not easy to say, on average I think its around 10% loss from FW to RW dependent on drivetrain, some calcs say its as much as 17% loss. I never really took notice of rwhp, fwhp is the key as nobody can accurately say how much every particular car will lose.
A true 500fwhp in 3200lbs at the track would be =
60 Foot E.T. : 1.50 ******
1/8 Mile E.T. : 6.82
1/8 Mile Trap Speed : 99.61
1/4 Mile E.T. : 10.81
1/4 Mile Trap Speed : 124
500hp on a dyno won't of course be 500hp on the track as you know so if we say 470 on the day depending on conditions/tune etc. its>
60 Foot E.T. : 1.53 *****
1/8 Mile E.T. : 6.97
1/8 Mile Trap Speed : 97.58
1/4 Mile E.T. : 11.04
1/4 Mile Trap Speed : 121
so your guess is pretty good.
Thanks for the reply. I guess the only way to measure driveline loss somewhat accurately is to go from engine dyno to chassis dyno and see what the difference would be, all things otherwise being equal. Other than that, ET/MPH is the most accurate on any given day.
I agree with the actual HP varying from day to day and even from minute to minute. Here in NY/NJ area we are pretty close to sea level. The best days for DA are in the fall, so that's when the records are set at Maple Grove in PA. Between June and September, it's usually 85+ with pavement melting humidity.
I am hoping to be in the 10s with my combo but am a little skeptical for now. I know one guy who has a similar if not milder combo than me who has been 10.60s. I think he weighs a little less but not much.
