Cylinder head - donor needed for '89 100 w/ NF engine

[Al S]

I can, but it would be a shorter message if I direct you to
http://en.wikipedia.org/wiki/Compression_ratio

Milling the head or cutting off material from the bottom of the head moves
the valves closer to the pistons. So a vavle job is necessary to move the
valve back into the head, as to not hit the piston when it comes up and the
valve desends at the same time. Milling will raise the CR and may increase
the need to increase the octane rating of the gas you use to prevent
pinging. It is a cheap?? way to get a little more HP.

Al


-----Original Message-----
From: quattro-bounces at audifans.com
[mailto:quattro-bounces at audifans.com]On Behalf Of L DC
Sent: Monday, June 26, 2006 4:47 AM
To: John Cody Forbes; quattro at audifans.com
Subject: Re: Cylinder head - donor needed for '89 100 w/ NF engine


Hi Al, could you please elaborate on that, in
particular on the compression ratio?

Al S wrote:

> Warped heat, which might be milled back to spec or
> flatness. Milling will also increase your
> compression ratio, be careful.

>>>snip

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