Head porting

[minimivic]

I assume these pulses are more relevant for log type manifolds rather than tubular. Still I've left a lip and opened them up a bit to hopefully help.

 

[ibizacupra]

yep. small step = good.
mine retains small step

 

[Yumann]

So what about scavenging over lapping of the exhaust and induction valves to clear the cumbustion chambers not pressure out the exhaust gasses?

 

[richybigman]

One word for this project = Mental!
Fair play to you!