I just rebuilt a 350, 30 over, new SR Torqer cast iron heads, 2.02 intake valves, 1.250" single spring 100# seat, 67cc chamber, Comp Cams 238 hydraulic cam, 262 adv duration, .462 lift. 110 separation. I used stamped steel 1.5 rockers with slotted pivot balls.
After the engine warms up, I get a "chirp" which sounds like a belt chirp but it isn't. I can narrow it down to a couple of valves and by adjusting the nut 1/8 turn either way, the "chirp" goes away, but it soon returns. I have replaced the slotted balls with smooth balls and everything was ok for about 50 miles, then the "chirp" came back. It was
suggested that I go to roller rockers but they are expensive and my machinist is not sure if this will solve the problem. Any one ever have this "chirp" in their valve train. Any help is appreciated. Thanks