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Showing results for tags '5.3 heads 1.8 rockers'.
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I figured I would post here before I went posting on LS1TECH and keep this thread updated once I come up with an answer. So my "new" setup: 5.3 Patriot heads stage 2 - bought used no specs 1.8 Terra Yella rockers stock GM 2002 LS1 head gasket Cam Specs: 228/232 111 .632/.600 So tonight I put clay on the first piston and bolted down one head onto the block and turned the engine over by hand to see how close I was getting to the piston. The clay was squashed but not broken through. It did look very close though so then I put red grease on the intake and exhaust valves and tried it again with no clay in place. There was no grease left behind by either valve on the piston. The 1.8 rockers are really my concern and I am thinking I would be safe with 1.7s. I am thinking with so much lift from the cam, once the rods stretch and higher rpms come into play, I may have an issue. Tomorrow I plan to search around on the LS1 site to find the specs on a stock 5.3 head so I can know for sure if these heads have been shaved or not. Knowing that, HG thickness, cam specs and rocker specs - I should be able to mathematically see where I am and if I have any buffer room.
