Hey I was wondering if anyone has ever installed a p8r head on a 8.8:1 compression b20b block and I was wondering if there were valve/piston clearance issues. The reason I ask is that the b20 that the p8r came off has different pistons in it. I was also going to run a crower stage 2 cam in the p8r head and was wondering if I may have issues then.

 

I think the b20b and b20z use the same slugs the head is the differance p74-p8r

 

the b20b and b20z have different pistons in them. My issue is I am wondering if the 33mm intake valves on the p8r ,in conjunction with a slightly larger cam, are going to make contact with the 8.8:1 compression pistons that are designed for the 31mm valves in the p75 head.

 

that being said I don't think you will have any clearance issues but triple check because I have ben wrong before I will be running stage 3 cams in my ls and from what I read there will be no clearance issues good luck

 

does anyone else have any input...maybe first hand experience?

 

Id have to say when you're using different sized valves and bigger cams, its always a good idea to degree them in and check piston/valve clearances. Youre going through the trouble, might as well do it right.

 

I know...but I was just hoping maybe someone on TR has done it before and would just let me know whats up before I go and buy the head and stuff.