Dick,
I don't have much experience with carburetors in the racing arena, but
the only difference between alky & gas is the amount of fuel needed, the
carburetor size (CFM) would depend solely on the size of the motor. As a
rule of thumb you will need almost double the volume of alky compared to
gasoline. With the injection, Kinsler says approx. sixteen percent more
jet for each ten percent of nitro. I think things get complicated much
more quickly with the carburetors. Besides jetting, air bleeds, dump
tubes, etc. come into the picture. Definitely a question for a fuel carb
guy.
Tom, Redding CA - #216 D/CC
Dick J wrote:
>
> Just how much more volume does a fuel motor flow.
> Let's say a straight alky motor. If a given
> motor is perfectly balanced with a 750 CFM carb
> on gas, is there a rule of thumb like it needs
> 950 CFM on alky? Now what if you throw in a
> light load, say 25% nitro into that alky? How
> much flow now? Another question for the same
> hypothetical motor. How much bigger should the
> jets get for alky, and how much for the
> alky/nitro mix?
> I know, I'm asking for sixty years of experience
> in sixty words or less here, ain't I?
>
> =====
> .............................
> ..........Dick J.............
> ......(In East Texas)........
> ..........# 729..............
> ........Roadsters............
> .Hemis and Flatheads Forever.
> .............................
>
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