Roughly, on asphalt, from flywheel HP, 15% loss manual transmission, 20% loss
automatic transmission, add another
10% to either for salt.
--- Ron USFRA
This may not help much since I'm running a FWD Honda and most folks are RWD
but I figure about a 10% drivetrain loss on the dyno (rubber on steel) and
maybe 15% on the Maxton concrete. This lines up pretty well with some other
independent info I have-but who knows?
Skip Higginbotham wrote:
> Hi Team,
> Over the past few weeks the subject of "how much HP" to go "how fast" has
> received much attention and Mayf's chart report is an excellent vehicle to
> get to the required horsepower....at the rear wheels on the ground. Thank
> you Mayf you have really helped me.
> If I have misinterpreted the charts......please somebody correct me!
> Now how about sharing some ideas and opinions (data?) on how much Hp is
> lost between the crankshaft flange and the ground at, say Bonneville with
> dry salt (more of less) and at El Mirage on a good day and asphalt (as a
> I think that the loss is 65% total at B-ville, 75% at El Mirage and 40-45%
> on asphalt.
> Any takers?
> Skip Higginbotham, Bastrop, Tx (where it is now 80 degrees) at 5:43 PMCST
> Air conditioning in January??????