Valve to cylinder wall clearance,Shrouding Question?
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There are both benefits and losses with relieving the cylinder. A chamber full off little crevices does nothing for the flame travel. The surface to volume ratio should be as small as possible. I know of stock racers using 2 bolt blocks in order to get rid off the relief that 4-valve blocks have. Beyond that you need at least 12% of the intake valves diameter in clearance to the cylinder wall at full lift. Erland.
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Curtis, your tech page used to have a percentage number of bore diameter to intake valve diameter.cboggs wrote: Web guys, .. ;-(
Plus I haven't had time to write any new tech articles, .. I'd really like to though. Too busy running a shop and porting.
That is what I was looking for last week.
Thanks for all your information and time you donate to these forums.
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