Real HP loss numbers

[Glen Beard]

A70Duster at aol.com wrote:

> Was wondering (induced by all the talk with computers recording spark signals
> and computing HP) what are the actually losses in drivetrain.  I've heard the
> torque converter is 97% efficient at part throttle and 2 hp at U-joints (I
> don't believe, that's 1500 Watts at each joint).  Looking at tranny (auto and
> standard) u-joints, ring and pinion, bearings, spider gears, axles....
> Mike

I don't think there is any way to give you some hard data as all cars are
different.  On the f-body list we generally accept 20% for autos and 15% for
manuals.  Of course this is through a rear wheel drive car and these are just
ballpark figures.

--
Glen Beard
95 T/A conv M6 Vortech  !heads, !cam
http://home.nycap.rr.com/gbeard1/TransAm.html