|
Registered
Join Date: Feb 2001
Location: Aircooled Heaven
Posts: 1,054
|
Instaling a seat with .030 of interferance fit will crack the exhaust port so bad its not even funny, I would like to see him do it!!
I use .012-.013 interferance fit, but the key is to use seat material that is above and beyod the factory standard. Even @ .012 they are still tight as hell, and can crack an exhaust port if you are not careful on a 2.0 914 head, they are a weak area..
I don't even sell heads,(pain in the ass and can't make a dime on them!) but I'll tell ya that it is not a game to be played with. In most of my engines, the heads cost me more than all the shortblock parts put together....
Play with heads, and you lose big time, valve failures destroy more parts than all other failures combined, trust me.
__________________
Jake Raby
Owner, Raby's Aircooled Technology
www.aircooledtechnology.com
www.massivetype4.com
|