ORIGINAL: Rudeboy
Yeah I know, but the 10cc, 15cc and 20cc engines don't have a Walbro type carb.
They have a "normal" twin needle carb (like a glow engine), but with a built-in pressure regulator, fed by a pressurised tank.
Now, on the Evolution and Horizon websites it is stated that these engines have a "crankcase pressure type carb"...which would be great, because you could mount the tank over the CG (crankcase pressure is rather high, and thus capable of feeding fuel a long way).
But apparently this is not the case, and they run on muffler pressure, which requires the tank being behind the firewall.
I would really like to know if the regulator could cope with case pressure...that would make life simpler. I guess I'll have to guinea-pig a crankcase-pressure setup, and see how it turns out.
Yeah, thanks for pointing that out. I am interested only in the 33cc or larger so I didn't look at the smaller ones.
As far as determining what pressure etc. you're probably on your own. If you are the experimenting type, it would be fun figuring it all out