Re: Cylinder head rebuild

[DeWitt Harrison <de@aztek-eng.com>]

On Wed, 2 Jun 1999 11:40:17 EDT, ScottyCBoy@aol.com wrote:

>[ ... ] The following is a list of mods I wish 
>to perform and need feedback and advice:
>
>Install larger valves, 36mm exhaust, 40mm intake 7mm stem
>Ceramic coat combustion chamber vale heads, exhaust ports, and ex valve lower 
>stem.
>Extrude hone ports
>O-ring head
>Copper head gasket
>[ ... ]

Extrude Hone will want a ton of money and make you wait
about two months. (They'll say 1 month.) Although the
process is just the ticket for manifolds which tend to be
inaccessible by hand tools, I think your money would be
better spent on having the head ported and polished
by a knowledgable shop. IMHO, extrude honing can't really do
any radius relieving, etc., and should be considered a distant
second choice for heads.

DeWitt Harrison
Boulder, CO
88 5kcstq