sup guys i have a gsr head thats been milled and need to know how thick the head gasket to run so it will be safe. both the cam gears are set to 3 degree advance so it will be TDC. i know i should clay it but want to know if anyone knows. thanks

 

You are lacking waaay too much info for anyone to even give you and answer, and why are your camgears advanced what cams are you using??

 

You are lacking waaay too much info for anyone to even give you an answer, and why are your camgears advanced what cams are you using??

 

lets start off by telling us how much the head was milled and what CR you are aiming for

 

alrite lets start from the being i had a LS vtec with rs machine itr pistions i was running a gsr head that the previous owner milled dont know how much but i'm guessing i only have 1 or 2 resurface left so what we did to get the timing correct we had to advance the cam gears 3 degree plus i was running some jun3 cams too. now that motor is gone cause valve meet pistion and boom gone cause of the head milled now going b20 with rs machine itr and want to know how thick head gasket to run and make good power. i know clay it is the best way but want to know

 

Your head has obviously been excessively milled. You need to measure your deck height to get an accurate CR/ idea of where you need to be HG wise. I would guess you will need a thicker than stock (.030 inches thick). You do not want to go too thick because then your compression Ratio will obviously drop.

 

If you want to build it correctly, you don't add headgasket thickness for a lack in piston-valve clearance. You can, but you sacrifice more compression ratio that way.

First things first, you need to find out where the piston is in relation to the deck of your block. Does the piston come up above the deck at TDC ("out of the hole") or does it sit below the deck ("in the hole")? How far in/out of the the hole is it?

 

how are the valve reliefs on the rs itr pistons compared to the oem itrs??

If they're not deeper than you can't run the cams there's barely any p2v clearance with the B20V

Id deff take your head to a machine shop and find out how much its been milled and I would deff clay it when you put it together.

Still don't get why you have you cam gears advanced without claying it??

 

will just got the head back from the machine shop he told me that the valves are perfectly find so i guess the valve didnt hit the pistons but how can my piston crack off ?????? i think i should run a head gasket that is a little thicker then stock what do you guys think?

 

Did you even read the last few posts ya big dummy?

 

They are the same, hence the "ITR piston" designation. The valve relief depth is fine and much deeper than a stock B20 piston. If he had piston to valve contact with those pistons, his cam timing was all wrong.

 

Yea that advance in timing doesn't sound right