I am going to get a velocity stack made up this week.
I did a little porting on the intake. I increased duration by 10 degrees (I think its at 130 or 140) I have it written down at home. (im at work right now) I did test it again close to dark. it still got the same rpm. When I ported the intake, I also took some material off the top of the port and sides to enlarge it. Unfortunately, I took too much off the top, and now it is barely open when the piston is at BDC. This lets the exhaust escape out of the intake as well as the exhaust. It sprays quite a bit of fuel out when running. I was kinda pissed at myself for doing that. Before I headded in, I took the exhaust off, and the fuel didnt spray out as much, and I also got an increase to 7800 rpm. So Im thinking, cause the jug is pretty much garbage now. I am going to try to increase the exhaust by another 10 to 20 degrees and see what happens.
One thing I noticed on my short shaft cylinder is, the Intake port is slightly larger than the one off the long shaft engine. This could mean better potential for this engine.
So, for monday, Im going to go to a machine shop and see if they can do a couple things for me: Make a velocity stack and Bend up a header pipe, so I can use my home made canister.
I think the canister will help because I built it for a much larger engine, so the backpressure will me minimal.