Quote:
Originally Posted by Craig CT
The mushroom valves have less diameter and split guides. Has anyone used them on an 8BA performance cam to affect ramp speed, duration or anything else. Thanks in advance, Craig.
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I have never done it that way but you definitely could do it to increase port flow
only. In the olden days 1.625 head diameter mushroom stem valves were available. They came with the head undercut, the port exposed part of stem reduced diameter and polished for lighter weight and improved flow.