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Old 07-27-2012, 04:32 AM
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Originally Posted by prostcelica View Post
I have a stock SBC 350 bottom end. I am going to be putting some aluminum heads, roller cam, intake etc.

My question is how much valve lift can I get away with before running into valve to piston issues??

Stock flat tops with with 4 eyebrow valve relief, .025 deck heigth, .015 head gasket.

I heard you can run into issues with the eyebrows being to small to accomodate 2.02 valves??

Any input would be great. Thanks in advance.

PS: cam I wont to use has following .54 / exh .562
Besides the raw lift, the cam timing and additional advance/retard has an effect as well. There are so many variables that it is hard to guarantee anything when it comes to valve to piston clearance. I would definitely mock this up first and check the p to v.

Here is a page on things to check.

Stock piston valve reliefs need to be checked and clearanced if needed w/2.02" intakes. Aftermarket pistons tend to have more generous reliefs.
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