> > VW vent to fairly long extremes in
> > the old engines to route exhaust gasses up to warm up the intake manifolds.
> > The warm manifolds really hurt performance and gas mileage, but without

Actually it will improve gas mileage.  It does affect perfomance, but
warmer air temps will improve gas mileage.  That's why auto manufacturers
always have high-temp thermostats in their cars, even the performance
ones.  They get a higher MPG rating that way.  An old trick to get more
out of your car is to put in a low temp thermostat (usually 160 degrees).
This is impossible on an air-cooled vehicle, but you water guys out ther
might be able to try it.

Craig

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Craig Standley                             cstand@u.washington.edu
University of Washington     http://weber.u.washington.edu/~cstand
Physics
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