I have a 16 hp vanguard horazontal #404337 signal carb.
I was thinking of honing out the center of the carb so it has a straight smooth flow, Iam not sure if this would help or make problems .
The brass tube that the gas comes out of would need to be changed, the jet drilled out a little bigger and made adjustable, not sure about the low side jet.
The motor is not supper built , just open exhuast,billit flywheel and no governer.I will be adding a cam next year . Again this is just somthing Iam thinking about and thought I would ask everyone what they think about the Idea....