Copper Head Gasket...

[xuberantz]

Trinity big bore LR motor, 71m engraved into the 20cc domes on the trinity stage iv head.. pistons are 68.92mm big... The domes use "Fire rings" which instead of orings it uses a copper headgasket... I see copper head gaskets available in various thickness which i've found what the old one was but what size bore do I get for the copper headgasket? Do I get the 69mm to match the piston size, or what because I can't find a 71mm like the dome says only 70 or 72...

 

Also what kind of squish am I looking for? Any insight would be greatly appreciated, trinity is a pain in the a$$...

[BigRed350x]

Trinity big bore LR motor, 71m engraved into the 20cc domes on the trinity stage iv head.. pistons are 68.92mm big... The domes use "Fire rings" which instead of orings it uses a copper headgasket... I see copper head gaskets available in various thickness which i've found what the old one was but what size bore do I get for the copper headgasket? Do I get the 69mm to match the piston size, or what because I can't find a 71mm like the dome says only 70 or 72...

 

Also what kind of squish am I looking for? Any insight would be greatly appreciated, trinity is a pain in the a$$...

 

Sounds like another total fuckball engine setup from trinity. What stroke is your setup? A cool head or noss head with o-rings is the way to go. Not sure what kinda setup trinity sold you using copper. That's some whack shit. On a normal setup squish can be anywhere from .040 to .055 I've seen builders go as tight as .035 and as loose as .060 It all depends on what its set up for and what kinda porting you have. I would send your cylinders off to a competant builder (NOT TRINITY!) and have them check everything out and get you set up right with a set of custom cut domes and a good cool head or noss head. Give Kevin @ HJR a call. He can get you custom cut domes and get you fixed up right. His information is in my signature.

 

- Jared