RE: Secondary butterflies

[Rich Kinsley <rlkinsley@xxxxxxxxx>]

Daniel McCormack wrote:
> 
> I'm by no means an expert on carbs and as Don says anything is worth 
> trying 
> but I think you'll find the engine is going to bog when you tromp on it 
> with 
> those butterflies removed. As far as the AFB goes it's my understanding 
> that 
> the Edelbrock is not exactly a copy of the AFB (Aluminum Four Barrel) 
> but 
> more like the Carter AVS (Air Valve Secondary) Those extra butterflies 
> are 
> the air valves. You'll probably have to play with the secondary jets or 
> at 
> least the secondary metering rods and springs with the air valves 
> removed. 
> If you give it a try let us know how it works out.
> 
> Dan
> 
> 
> ----- Original Message ----- 
> From: "Sean B" <polecat2@xxxxxxxx>
> To: <1962to1965mopars@xxxxxxxxxx>
> Sent: Friday, April 04, 2008 12:20 AM
> Subject: RE: Secondary butterflies
> 
> 
> >
> >
> > Rich Kinsley wrote:
> >>
> > Rich,
> >
> > I have an original AFB from a '63 New Yorker, and another original AFB
> > from a '65 Imperial.  Neither one has this second, secondary butterfly,
> > and no one on this list in the past knew why--and I'm still dying to
> > know.  Obviously, these two carbs are designed to operate without it,
> > while yours is designed to operate with it, so I'm guessing that you
> > MIGHT have to retain it.  Either way, a very good question!
> >
> > Sean
> >
> >
> >>
> >> Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies
> >>
> >> I was just pondering what would happen if I was to remove the vacuum
> >> operated secondary butterflies from my pair of 500cfm Eddy's? The
> >> secondary side has two sets of butterflies. The set that is inline with
> >> the primary butterflies is mechanical linkage and a second set is up in
> >> the venturi and is vacuum operated. I guess I was pretty carb dumb until
> >> I started messing with these. I jave drilled the counterwieghts per
> >> Edelbrock tech line but I'm thinking that there'd be more flow without
> >> that interior set getting in the way. I know I'm gonna get spanked on
> >> this one but what about it?
==========================================================================================================================================


I always like to document my changes with a pre-change baseline so I 
have the oportunity of being able to see what the difference really is. 
I think I will try it but not before I run it in the improved  version I 
am preparing now. Time slips offer some real info.

Regarding bog, that seems the most likely problem to me but I won't ever 
be coming off idle to WOT when racing as I'll be up on the converter as 
much as feasible. That might help prevent the bog too.


Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies


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