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Last year I was battling vacuum leaks. Since I was rebuilding the Engine and had the manifold off I thought I would see how straight it was. It took close to 1/16 inch to make it flat no wonder I was having annoying sucking sounds .
Last year I was battling vacuum leaks. Since I was rebuilding the Engine and had the manifold off I thought I would see how straight it was. It took close to 1/16 inch to make it flat no wonder I was having annoying sucking sounds .
I had to do the same thing to one of my Super Rams a couple years ago. Needed to true up the surfaces on the runners and the plenum box. I got everything nice and straight but it took time.
[img alt="I see we use the same Heads and Rockers. Using the short Poly Locks I needed to clearance the Rockers a bit to clear the Hex in the Lock. Didn't take much I didn't do it the first season they clearance them selves. But now that I knew about it I figured I better do something.
"]https://cimg5.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/2000x1504/17728395976001119395058895514271_45d3877 4666d5fc1f7fa0561de7003fa8f0fea85.jpg[/img] I see we use the same Heads and Rockers. Using the short Poly Locks I needed to clearance the Rockers a bit to clear the Hex in the Lock. Didn't take much I didn't do it the first season they clearance them selves. But now that I knew about it I figured I better do something.
Good to know. I'll keep an eye on it. I noticed that the hex on my polylocks is close to the rocker but it does clear. I'm running a Summit Stage 4 cam with about 0.590 lift using 1.6 rockers.
Good to know. I'll keep an eye on it. I noticed that the hex on my polylocks is close to the rocker but it does clear. I'm running a Summit Stage 4 cam with about 0.590 lift using 1.6 rockers.
You can use shorter Set Screws for a little more clearance depending on how you adjustment comes out. The C4 Magnesium Covers are somewhat thick and can have a little material removed, that is except for the 7-8 Cylinders it looks thin back there.