Re: 5000CSQT head mods...

["Bruce Bell" <bbell@bbell.com>]

> From: ScottyCBoy@aol.com

Snip

> If bigger valves are going to be installed what is the largest head
diameter
> for intake/exhaust???
> As far as porting goes where can the largest gains be made, the intake
ports
> or the exhaust ports???

Good questions which I would also like to see discussed.  John Beckius
wrote an article for the Quattro Quarterly in which he said: "Do not match
the exhaust ports to the exhaust manifold!!!". He goes on to say there is
an intentional mismatch to create a "reversion dam" that prevents exhaust
gas from reentering the combustion chamber. The full text of this article
can be found at <http://www.rof.net/yp/sportwhl/engine3.htm>

I'm curious, as I don't ever remember this coming up in any discussions on
this list.  I know several of you have had your heads ported and polished,
even extrude honed. what did you folks do with the exhaust ports?  

Bruce