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http://www.rbracing-rsr.com/squishcalc1.html & http://tinyurl.com/ojs46g
They are correct, but in both cases they are talking about Harley's which have Hemi heads. Pure Hemi heads are possibly best two valve design for breathing, but the worst design for combustion. The intake gives no swirl like some other two valve head designs are capable off & no tumble either which four valve heads have. Addition of quench is essential to Hemi, partially because it reduces the combustion area.
My machinist, Ed Trihey, has.....never once said to me, "Don't run the clearance that tight or you'll make less power."
What clearance did he recommend?
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