Quote:
Originally Posted by todayican
Thanks for the pointers! for the record, the Diesel is air cooled as well
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If the engine has a crankshaft-mounted fan which induces air into a shroud,then forcing over cooling fins on cylinder and head,the 'inlet' diameter and its free area on the shroud will be your guide for ducting area.
I don't trust my memory and neither should you,but,say,Korff said a 'radiator' inlet,with full width of the radiator,but only 1/6th the height,at a distance ahead of the radiator equal to the radiator height,then that might give a clue as to the minimum.And this would be for nice,smooth-walled duct,air-tight,so as not to lose any precious ram pressure from the inlet.