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

akallotte at juno.com akallotte at juno.com
Mon May 14 12:56:05 GMT 2001


I'm glad someone else backs up what we've seen on the flow bench.  Super
polished parts lead to weird turbulence (backwards flowing boudry layers)
and less flow.

On Mon, 14 May 2001 02:35:47 -0800 Ludis Langens <ludis at cruzers.com>
writes:
> 
> Books that I've read say that the turbulence _increases_ airflow -
> something about a smooth surface causes lamular flow along the 
> surfaces
> (with a dead spot in middle of the runner), while a rough surface 
> causes
> the whole runner cross section to be used.
> 
> -- 
> Ludis Langens                               ludis (at) cruzers (dot) 
> com
> Mac, Fiero, & engine controller goodies:  
> http://www.cruzers.com/~ludis/
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