Originally Posted by
steve111
Funnily enough, the topic of conical pistons came up over at Dave Owen's only yesterday, while looking at a couple of dismantled ED Racers.
G'day Steve, those would be my Racers, a bit of a dogs breakfast to quote David.
He is going to fit a flat topped piston and contra to one of them for me. Will be fun seeing if any of the old blokes at the club pick it up.
I'm not expecting any difference in the running.
I assumed that the cone in a peripheral port engine worked in a similar manner to the baffle in a cross flow engine ie it helps direct the incoming transfer charge up into the cylinder which helps chase the exhaust gas out. It seems that a flat top piston works just as well (in most cases?) I guess the transfer flow meets in the middle and goes up any way.
Dave H