Listers,
I've always heard figures of "power loss" through a drive line of 5% to 25% and
I always wondered where does this figure come from? Has anybody does a
measurement?
For the 20% figure quoted below, a 300 hp engine on the dyno should expect to
have the transmission, driveshaft, and diff. consume 60 of those ponies? I
assume that rolling and air resistance are not considered.
That seems really, really high to me.
Lift a car off of it's rear wheels, and you can turn the wheels easily with your
hand on the drive shaft, with the car in gear and the clutch pressed in. I know
my hand isn't anywhere near 60hp strong. Heck, my wife beats me in arm
wrestling! (really!)
Maybe Laifman, or somebody can offer up an explanation. I just can see that much
power being gobbled up.
Peter S.
B9471799
Wright, Larry wrote:
> Larry Paulick wrote:
> > Hi Larry. I have been informed by several members that the
> > numbers are
> > going to be just about right. The hp reading are at the flywheel, and
> > the car looses from 15-20% going to the rear wheels. (SNIP)
> > With the crate motor, your motto of "I can't get no-- Satis-Traction",
> > will really become pronounced.
>
> I was curious what the % of loss would be, thanks. Knowing what the
> car does _now_ at WOT, it's just as well I didn't go any 'shorter' on the
> gears.
>
> > Larry, drive by with your car when it's out of Jeff's and we
> > can listen to stereo Tigers.
>
> Your neighbors are going to just love that. A quiet block of stately
> brick homes, populated no doubt by professors from nearby UofM no doubt, and
> a couple of "kids" disturbing the peace with their hot-rod cars. Sounds like
> a plot for a 1950's movie. "British Cars From Hell", with Bob Denver as
> Larry Wright. Who portrays you?
>
> Larry Wright
> "I can't get no-- Satis-Traction"
>
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