Supercharged carb set ups

[Robert W. Hughes]

>         Just a mention.  Studebaker used blow through carbs on it's
> supercharged V8s in the 50s and 60s.  The trick they used was to 
> builda pressure box around the whole carb, avoiding the problem of
> reduced fuel flow by pressurizing the bowl to boost pressure.  The metering
> can then be kept consistant.
>         They used a regular Carter AFB 4-bbl, no modifications other than the
> pressure box.

Almost. If you look at the top of an ordinary mechanical fuel pump, you
will see a small hole in the cover. This is the pressure reference for
the pump. Studebaker added a line from here to the blower output so that
fuel pressure rose with boost. In case of a ruptured diaphragm in the
pump, this would cause the crankcase to be pumped full of gasoline.

-- 
Robert W. Hughes (Bob)
BackYard Engineering
Houston, Texas
rwhughe at ev1.net