well, there's nothing modern about an F head design, thats for sure!, the only "modern" thinking i want to encorporate is to match the flow as closely as possible. We know a bit more about chamber design and getting a flathead to breath than we did 40 years ago and I wouldn't want to lose chamber effiencey or make the exahaust ports so large that they lose velocity.
Yes, challenging with a pushrod F-head placing a valve right over the piston crown. Some guys with obvious expertise have already posted, so calculating volumes and port sizes shouldn't be an issue. That valve placement is problematic, but the stock exhaust valve pocket would be eliminated in your chamber design I would think? And where to place the plug...A fun problem to puzzle over.
ned, here is the pic of the intake port cutaway curtesy of vergil on the hamb. he's done an exhaust port cutaway as well. both of these are very enlightening!:
The Jalopy Journal
