[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [New Search]
On 1 Sep 97, Jasper flatfour racing wrote:
> I agree. What difference does the tranny make on whether or not
> there is a point to putting an engine together to last? Why would a
> counterweighted crank NOT be needed in an auto?
> > I thought that a (properly) counterweighted crank helped reduce wear
> >and friction at just about any speed over 2000 rpm? Or is this not
> true in a horizontally- opposed 4?
I think 2000 is a bit low. Maybe above 4000 and certainly above
5000 you can expect to find an improvement. These improvements are
not in performance, except that there is a loss of preformance that
comes with center main bearing elongation and rod non-linearity.
I don't think the flat 4 is any different from any other with regard
to a CW crank.
I probably should not have made the AT comment, because it was based
on assumption on my part about how the car might be driven. I
suspect that it is possible to drive an AT at revs that would make
the CW crank desirable; I just thought it was unlikely.
Jim
---------------------------------------------------------------------
Melissa Kepner Jim Adney
Laura Kepner-Adney
jadney@vwtype3.org
Madison, Wisconsin
---------------------------------------------------------------------