I've seen something very similar to these used on heads using longer t/a or W2 length valves with .650"+ valve lift on the intake.
I wouldn't think they'd be necessary for sub .550" of lift
I've seen something very similar to these used on heads using longer t/a or W2 length valves with .650"+ valve lift on the intake.
I wouldn't think they'd be necessary for sub .550" of lift
For people like me who put longer valves in it works well. The 318 valves I put in the slant head were long enough that they moved far enough away from the rocker shaft, correction was needed to get geometry right again. His shims got it dead right.
But for the guys like me who have, say, econo W2 heads, I'm limited to a .550" lift camshaft due to the short valves etc. if these things work, I don't have to replace what I have or do extensive machine work to get rid of the cast in pedestals and just shim up what I need.
I'm going to look into this!
Pretty cool little setup-are they only for use with roller tip rockers, or would they also be compatible with the ductile iron type BB rockers? I've been debating whether to stay with those or drop the coin on a set of rollers when the time comes.
W2 econo heads are not limited to .550 due to valve length....if you are limited to .550 it would be the spring height or coil bind on the springs...not the valve length