I forgot to reply to you F5 Dave - the volume of mixture in the transfer duct total is in excess of that getting into the cylinder , so in reality there is no flow from the
case ,thru the duct and out the port at BDC.
Thus in many cases the duct volume may be too big , and maybe this is a downside due simply to inertia effect.
Some are too small , and the energy needed to try and move mixture from the far end of the duct is too great - again a down side on power.
I will try the milled spark plug idea on a KZ2 as soon as I can , we have a tech rule about no plug body intrusion into the combustion space past the end of the head threads.
But with the nose sticking out 3mm , and the body flush , this puts the ionizing spark gap way closer to the middle of the chamber - and its legal as.
Will post dyno graph as soon as its done.
Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.
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