- Sep 12, 2014
- Reaction score
- Modena (motor valley) Italy
I know its more complicated than this, but FWIW the carb orifice size you eventually selected lands like so on these cross plots I made of various 4-stroke OS brand (methanol glow) engines.
Very interesting your analysis, I will take note .
in my engine, 2 out of 6 cylinders are in the intake phase at the same time. Let me explain better: one cylinder starts the intake phase while another cylinder is completing the intake phase, this roughly means that 1.3 cylinders are sucking simultaneously from 1 carburetor. So I thought that a large diameter Venturi was needed, instead small is better