Well, I've got a giant box full of empty aluminum mousse cans too........ and I have the header. I've got about 50 different mousse cans. Some as tiny as 1.5" diameter x 3" tall. Some are significantly larger 2" x 8" or even 3" x 10". I save every aluminum mousse can, hairspray or perfume can my wife brings into the house.

I've been doing google searches and also searches on RCU for the last couple hours (based on advice from TFF - my mine is NOT made up yet Thumbskull) and trying to determine the correct volume of a mousse can.

I'm sure there is a calculation of formula to tell what size can for a given engine displacement. I got my calipers out and measured the stock TH .75 muffler. It's about 16 cubic inches ..... equal to 21x the volume of the engine.

Then I looked at the Bud Light aluminum beer bottles and calc'd one of those at 62 cubic inches. I see guys using those for 100cc engines. A 100cc engine is about 6 cubic inches - so the Bud Light can is only 10x the volume of the engine. But some guys use a can for each cylinder. So each 50cc cylinder gets a Bud Light can - a ratio of roughly 20:1. And then some guys are using a Y header and running both cylinders into a single can. Back to the 10:1 ratio.

This is why I'm even more confused than when I started. [sm=lol.gif]