Re: [HSS] Carb Re-Tool

Unknown

jjpippers wrote:

>

> Seems I started something here, but nevermind the electric vs vacuum

> debate for now. I have an engine (actually two) but no carbs. Is the

> consensus that I should flip the intake and go to a downdraft, or

> look for a Carter BB-1 to retro-fit?

>

There is an alternative, but it may not be an easily obtainable one over

there. The ealier Stewart carburettor used on the '23-'26 side valve

Hudsons work extremely well on the F-head motors, and being made of

brass, are virtually indestructible. Twenty years ago, on the eve of

departing for a major rally, my Marvel carb was leaking at the fuel

intake. I tightened the fitting, and cracked the casting. With only a

few hours to spare, I removed the heat exchange casting, blocked off the

exhaust manifold by-passes, made up a flange with an extension pipe

from the intake casting, and mounted a Stewart carb. The choke and

throttle fittings are almost in identical positions. I used this carby

for five years intil I eventually found a bronze Marvel carb off a

Buick, and adapted it to fit the Hudson. The Stewart performed well,

gave better fuel economy, did not leak, and was in all respects a better

unit than the Marvel, but for the sake of originality I have restored

the car to Marvel unit. The only difference between the bronze Buick

and '27 Hudson carbs is that they are single jet, and the high speed

control is on the opposite side. The single jet doesn't seem to make

any difference. I experimented with jet sizes until I found one that

gave optimum economy without compromising performance, and have made up

a link actuated from the inner side of the throttle shaft to lift the

high speed pin. I still have the Stewart as a stand-by. Watch out all

you '23-'26 Owners. If your carburettors start disappearing I will deny

any knowledge of this information.

Geoff.