any port matching videos out there?

ive been scouring youtube but all im finding are automotive tuts and there not even that detailed, im working with a motobecane 50v and i wanna match it to my new 15.15 sha intake

Re: any port matching videos out there?

Basically you just "ramp" the existing intake hole on the outside to match the diameter of the new intake manifold. I would use hand files and take it slow. If you don't know what you're doing then do NOT mess with the port window inside the cylinder.

-Aron

Re: any port matching videos out there?

optimum flow to crankcase requires same size window as carb outlet. Regardless of shape, you want the whole port, carb to cylinder window, to have the same cross section area. Sq. mm of carb to sq. mm of cyl. window. You must do the math.

Re: any port matching videos out there?

I wasn't going to recommend doing this^ because you can screw it up if you don't know what you're doing.

But you can if you want. He is talking about if you want to get the most out of your new carb and intake.

-Aron

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