i looking either by a used sleeved block or new sleeved block! i found a used b20 sleeved block with rs sleeves stock 84mm bore only ran on the dyno i was told who knows! is it okay to bore and hone to a 85 or would it just be better so get one done by GE or someone so i dont lose the integrity of the block by boreing it .40 over?

 

Grammer OWNZ

Why do you need to bore it at all, was the engine blown up? Scraches in the CYL's? 84.5 is always an option too.

 

cause i already have 85mm pistons sorry! i am just asking whats the max that any has bored a sleeved block or what is safe

 

up

 

85mm should be the max for an NA application if its a street car.

 

85mm should be fine. You should really call RS Machine to see what they recommend the max bore would be because it is their set up...