Ported cylinder or Serval

[dave5.0]

That looks like a cool idea. Those snow bikes could use some more ass from what I've seen. I'd go serval. Big bastard. Haha.

[moparmadman40]

ok, here's an update. i took a better look at things today and to my advantage i found that the stock banshee cylinders have sleeves! when they were dirty i couldnt tell that they were not aluminum and thought that i was screwed that the piston scuffed one a touch. but now i'm all good and can just clean up with a hone. SO, i will be using the stock cylinders now.... and i did want a 4 mil for the extra power and torque. so if i put in a 4 mil long rod crank and stroker pistons, what sort of port timings would i want to run. From what i gather of reading on here i would call what i want an agressive dune port. what would i want for port timings/port heights on something like this?

 

The cylinders i have are allready slightly modified. The guy that had it before me had 0.030" (0.75 mm) taken off the bottom of the cylinders for more bottom end. The port heights are stock so 30 mm exhaust and 43.5 mm on the transfers.

 

Even better would be if someone could send me the port timing/height equations or an engine program. none of the ones i've been finding work.