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Re: [T3] Engine Questions

On 6 Mar 2001, at 16:28, Jedediah Millheiser wrote:

> i assume by slip-ins you mean cast pistons.

No, he's referring to the cylinder sets made with an oversize ID, but 
the stock OD so they will just "slip in" to a stock case without 
machining the case holes oversize. This is a very common cheap way to 
increase the displacement of the VW engine. The problem is that when 
they increase the ID and hold the OD constant the wall gets thin and 
the rings won't seal, and the parts don't last.

Engines built this way rather quickly develop less than stock power 
and have much less than stock lifetimes.

The alternative are "machine in" P/C sets which require that you send 
the case out to have the sockets for the cylinders bored out to fit 
the larger cylinders, which are larger on the OD as well as the ID. 
This is necessary to get stock reliability with larger displacement 

ALL the questions you've been asking are carefully answered in this 
very good book. If you have any thoughts of doing any HP engine work 
you need a copy.

How to Hotrod Volkswagen Engines
by Bill Fisher
published by H. P. Books, Tucson, AZ, 1970
ISBN 0-912656-03-4
(excellent book, well written and researched) 

Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA

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