Horsepower losses

[Daniel Ciobota]

Umm, the Fiero 2.8 was rated at 135hp flywheel.   Added data point:

>From many gathered dyno runs on stock 5.0L mustangs, the consensus is
that 17% is pretty accurate for power loss through a stock mustang 5.0L
5 speed drivetrain (225hp flywheel, 193hp rear).  Of course, any
modifications to the drivetrain are likely to change that figure.  If
the fiero was dyno'ed at 120,  then the power loss is 12.5%, which is
pretty good, even for fwd.

Daniel


Ludis Langens wrote:

> Graeme Wellington <brideson at gateway.net.au> wrote:
> > Does anyone on the digest have any data that they can help me with
> regarding the
> > losses of power through the drivetrain of a car? I am looking for
> empirical data, actual
> > differences between flywheel and rear/front wheel horsepower for the
> same car. I
> > understand losses through fwd type gearbox setup where a hypoid
> drive is not involved
> > are less than rwd. Data relating to 4 cyl, 6's, V8's etc. all
> appreciated.
>
> Here's a data point: the Pontiac Fiero V6 was factory rated at 140 HP.
>
> Someone I know rear wheel dyno tested his car at about 120 (pitiful)
> HP.  This is a transverse mid-engine RWD setup using a FWD type
> gearbox.  The 140 HP sounds about right for an American port fuel
> injected pushrod 2.8L iron lump.
>
> --
> Ludis Langens                               ludis (at) cruzers (dot)
> com
> Mac, Fiero, & engine controller goodies:
> http://www.cruzers.com/~ludis/