Originally Posted by ddoyle
Bob, any reason to use the 1.72 valves over the 1.85? Seems with the porting issues(the lip) it would just be easier to just go with the 1.85 valve.
Thanks,
Dan
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In this instance the head was already machined for the 1.72" valves, so I used what I had for the demostration. Another concern is that with bigger valves and especially in conjunction with a higher overlap camshaft, piston-to-valve clearance is often at times an issue. I prefer to use 1.85" valves, but if I were to retain stock 1.9 pistons there would be an interference issue. Just something to consider.