Re: Port and Polish

["Dave Fournier" <davidf@teleport.com>]

Patrick,
I believe porting is matching the intake manifold "runners" exactly to the
"runners in the head. Polishing is where they actually polish the inside of
the manifold and runners all the way down to the top of the valves. The
performance gain comes from the fuel being able to flow "smoothly" down to
the top of the pistons. Less restriction.

Dave

replyto:davidf@teleport.com


-----Original Message-----
From: Patrick Sherman <patrick@volkswagen.org>
To: Jetta Mailing List <jettaglx@igtc.COM>; GTi Mailing List
<gti-vr6@dev.tivoli.com>
Date: Sunday, July 12, 1998 8:33 PM
Subject: Port and Polish


>This may sound stupid, but anything to get this cop topic to disappear..
>
>What is a Port and Polish? I mean what do they actually do, and how does
>this affect performance? I am VERY curious.
>
>Patrick Sherman
>mailto:patrick@volkswagen.org
>1997 VENTO VR6 / Tornado Red / 18K
>"One cannot live on air alone....Add Water"
>