It's interesting you mention the progressive setup. I tried that on my
setup and it worked horribly. First, there is no plenum in the manifold and
I'm not sure how one would add one (it's a pretty small opening). Second,
the inlines are prone to fuel condensation in the manifold, therefore heat
must! be added to the base of the manifold (this may or may not have an
effect). I also think the carbs are spaced too far apart and the cylinders
that are spaced far from the primary carb get starved for fuel. If someone
figures out how to get a progressive setup to work on an inline, please
email the group as I'm very interested (especially with Rochesters).
Allen in Seattle
'50 3100
----- Original Message -----
From: "J Forbes" <jforbes@primenet.com>
To: "Old Trucks List" <oletrucks@autox.team.net>
Sent: Sunday, December 10, 2000 7:03 PM
Subject: [oletrucks] Dual carbs/vacuum advance q
> Not quite the same as a stovebolt withdual jugs...but on my
> blown 454 in my 55 Belair, two Holley 650cfm 4bbl carbs, I run a
> progressive linkage, with the rear carb opening about halfway
> before the front one starts to open. I have the vacuum advance
> connected to the rear carb, ported vacuum.
>
> I'd suggest running progressive linkage on the old 6 as well, as
> long as there is some type of plenum in the manifold. This will
> give you the improved driveablility at low throttle openings,
> and you can have the "secondary" carb open during the last half
> of gas pedal travel...so it'll feel like somethings happening
> when you put your foot down the rest of the way.
>
> Opinions may vary...I've never messed with a multi carb 6 cyl,
> so there may be something I don't know about them.
>
> Jim F
> 59s inAZ
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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