Date:         Sat, 26 Aug 2000 00:57:57 PDT
Reply-To:     Mark Dorm <mark_hb@hotmail.com>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Mark Dorm <mark_hb@hotmail.com>
Subject:      Re: Bearing wear
Content-Type: text/plain; format=flowed

>From: Charles Hokanson <Candmhok@aol.com>:

>Operating an engine outside of its power band causes excessive wear, >if
>you widen or change the power band and operate it in the power >band you do
>not increase wear

I like this thought, used to drive a trans am with 400 cu in motor in it (or
maybe it was bigger, I was just a kid, 1978 manual four speed trans am). And
I would drive it around underneath its powerband trying to save gas - dumb
idea....

>The increased bearing wear comes in as the engine Revs higher and the
>centrifugal forces cause the crank to flex in the middle. Generally
>increased past the 4000 rpm mark. What drivers tend to do (some, many,
>most), in an attempt to get to speed quicker, rev the engine past 4000 >up
>to redline, 5800. Robert Lilley

I never drive past 4000 rpm (well, maybe I'll go up to 4200 sometimes...).

Robert, are you saying that with the chip, the engine turns less to get the
same power - that would make it cooler wouldn't it....

Physics lesson: (those not inclined will want to skip the following)
And about centrifugal force: it doesn't exist. Thats about the only thing I
learned in Physics. Centripital force is real: you swing a ball on a string
and the force applied to the ball changes its direction..... If the string
breaks the ball moves in a straight line which is inertia: there is no force
forcing the ball to move outward from the center, the ball just starts to
move in a straight line because there is no longer a force pulling it into
the center - of course the ball slows down and hits the ground but that's
because of friction from the air and gravity from the earth which are yet
other forces. In a vacuum with no mass and no limits to its no dimensions
the ball would move in a straight line forever, it would be in a state of
inertia: the tendency to maintain the same motion or nonmotion, whether
moving or still. You don't want to get up out of your couch: thats inertia,
you don't want to stop for directions: thats also inertia. Men are big on
inertia.
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