Speedmaster Stainless Rocker Arm Issues

rumblefish360 said

According to Mike- B3 - IIRC - for the TT heads the Harlandsharps need no correction and the PRW could use a minor one just to dead nuts on.

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That is incorrect, Rob. The Harland Sharp rockers need more correction than most, even on the TF heads. Throw a set of T&D 8130 rockers on a TF head, and run .700" net lift, and you won't need any correction. Outside of that scenario, it will need adjustment, just not as extreme as other "factory copy" type heads.

To address other comments as well, the factory engineers did very well at the stock rocker geometry. Once us performance nuts start putting aftermarket parts on the motor, things get sideways in a hurry. Has anyone ever seen a factory motor with roller rockers and say, .550" lift"? No? Well, that's why the issues start when we do it to our engines.