MOPED ARMY

Yes, Gila 2.0 tonight's work

Cool beans. Here's a picture of my work today. It's a bitch to get in there with the files when the ports are so much smaller (50cc).

the bridges keep your rings in. Jennings suggests smoothing, but not knife edging, because the fuel air mix isn't going to go supersonic.

Because it doesn't work

.. virtually everybody (through many many years) thinks that thinning and 'knife edging' those separateing walls would increase flow

.. but it doesn't ... flow bench tests have prove that that DECREASES flow

... like most things in physics ... quite often the "common knowledeg" of average people ... proves to be the opposite of what is actually true

.. especially with regards to airflow and that type of thing

on a slightly unrelated note...what are the two holes on the intake side above the intake port of the gila cylinder?

I would say that you need those separations to divert flow into the individual transfers. But the act of knife edging often does cause turbulence at the split zone which slows down the gases being transfered into the combustion chamber. The other part of the equation is where you want the gases to go into the combustion chamber? Often having different convergent zones will either increase torque or increase high rpm hp but usually will not do both and the design of them should most likely be inline with what you want the motor to do. Street racing, hill climbing blah blah.

-naz

aeroplane... ok whatever stick your hand out the window and make i knife and then face your palm out. there! those holes are extra boost ports i made check my thread out gila 2.0

common sense: a blunt object opossed to a nice slopping smooth edge will have less resistance and have less turbulence. done

i've done it on all my kits and my e50 does over 65 at over 11000rpm, theres my proof

I've never seen any side by side data on knife edging vs. not. But! I have a friend that i see every now and again who is the head tech on an AMA Superbike Team. He used to build MotoGP 250 bikes back in the 80's and 90's. We were talking 2-stroke theory and he mentioned that knife edging was the way to go; amongst the other things we talked about. In my opinion it probably only makes a tiny difference, but I trust his advice, having built up bikes to such extremes.

Yep the knife edge is the way to go, it will increase airflow. Anything you do to reduce drag will increase preformance. After this get some CRAYTEX adrasive cones and polish the hell out of everything, mirror finish everything. Yes I know everyone says you have to have a rough surface to keep the fuel mixture in suspendtion but the distance it is traveling is so short and it will be traveling at a high rate. I did this to my kawasaki triples and they ran like a dream, AGAIN POLISH THE FUCK OUT THE ENTIRE INSIDE OF THE MOTOR. You will not be disappointed.