polishing intake runners worthwhile? & bosch high psi/highvol. pump info

Seth Bibler sbibler at aracnet.com
Tue May 15 01:52:06 GMT 2001


> >From everything I have read, a slightly rough (finished with 80-120
> grit) surface will provide the best flow. Too slick creates a thick
> boundary layer, too rough and you get major turbulence. Either way you
> lose potential flow

I agree about this and have read the same.  Think of the golf ball.  Why all
the dimples instead of a perfectly round ball?  The dimples help create a
boundry layer that allows the ball to fly further.  Sort of like ball
bearings in the air.  The same holds true inside an intake manifold.

Seth

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