i have been having alot of headgasket issues after going to 84.5mm at high boost (32 pounds with a s372 fully built ls/vtec) it will blow the headgasket every time when i was 84mm never had one headgaket problem i am still using a oem b20 head gasket with arp studs I was curious if you have any sugestions on what head gasket to go with and yes the head and the block have both been inspected any help would be appreciated

 

What sleeves are you using and is your block o-ringed ?

 

How many times have the headstuds been torqued down? Generally you can get 3 uses out of them, I would check them out...you may possibly have stretched them out.

If you continue having problems, look into the L19 stud kit or go to a 1/2" stud.

 

the block was sleeved at rs manchine so its not o ringed do they make a 84.5 honda b20 headgasket or 84 is ok

 

IF your headgasket is smaller than your bore...then your headgasket is hanging inside your combustion chamber. The lip of your headgasket could be heating up and causing pre-ignition. It's ok to go bigger headgasket than your bore but not smaller headgasket than your bore.

 

i have a 84.5mm bore and we recently pulled the head and found were the edge was barely in the cylinder so we upgraded to a 85mm headgasket.

 

where would u get a 85 mm head gasket does honda sell oversize stuff like that or do i have to get a golden eagle one

 

Golden Eagle gaskets are Honda gaskets. GE just Overbores them to fit Customer Specs. You can also try cometic, but I'd stay with Honda through GE.