Higher Compression pistons with 264 cams
- Thread starter Boostage
- Start date
Too many variables to make a generalisation on this it needs to be measured on a motor to motor basis.
I seriously doubt you will have a problem.Unless your going with some HUGE domed pistons. You can install pistons and clay the motor to check your valve-piston clearances.
If the clearances are to close for your liking, get a thicker MHG. Of course that might cancel out your high comp. pistons.
If the clearances are to close for your liking, get a thicker MHG. Of course that might cancel out your high comp. pistons.
.340 lift are the 264's the interference point is about .355-.360 ish
You should have form room to play, also, even with an engine melt down piston would have to be pushed all the way up and valve all the way down to kill start the bend. most the time the dowel on the cams break first and the cam gear spins before the valve breaks... At least that was the case in my case when I spit a shim. with .404 lift cams.
You should have form room to play, also, even with an engine melt down piston would have to be pushed all the way up and valve all the way down to kill start the bend. most the time the dowel on the cams break first and the cam gear spins before the valve breaks... At least that was the case in my case when I spit a shim. with .404 lift cams.
Better question is why take a chance? no one here is gonna buy me a new set of pistons and valves if in the event the tensioner breaks, cam gear slips or belt breaks. I have seen it too many times and would rather stay on the safe side and sacrifice a few ponies. its not like cams and headwork isnt going to increase VE. I would like to bump up compression a little, but if I am at the point where it would make it interference, then I would just call it a day with just the head work and cams, but other than that its not worth it for me, as the risk of destroying a built head doesnt sit well with me.
what he says above.
However, 1jz are farily high compression already mine clocked in at 170 PSI cold... I dont' know how much more you want to go with boost as it will just detonate unltess you are running high octane fuel or a really big efficent turbo.
However, 1jz are farily high compression already mine clocked in at 170 PSI cold... I dont' know how much more you want to go with boost as it will just detonate unltess you are running high octane fuel or a really big efficent turbo.