Re: AVS - AFB ?

[rll <rlipinski3@xxxxxxx>]

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Date: Fri, 19 Aug 2005 09:55:19 -0700 (PDT)
From: tom hecht <baddd65@xxxxxxxxx>
Subject: Re: AVS - AFB ?
so to understand, an afb or performer is comparable
to a double-pumper and regular edelbrock is a vacuum
secondary?
if i see one at a swap, what could be wrong with it?
tom
65 satellite



HELLO LIST

> From a posting on the Mopar Mailing List the new "AVS" by
Edelbrock does not have the same mechanical structure as
the original AVSs.

The AVSs had a brass tube instead of the venturi system of
the AFBs (in the secondaries).

It sounds like the new AVS is a combination of the air valve with the AFB
style venturi.

I do not have one in my possession so this is a best guess.

Some of the AFBs had a counter-weighted butterfly over the throttle plate.

The AFB that came with my 65 sat does not have them....

A 9500 AFB I bought from ebay ...does have them...

This was probably to ease the transition of the secondaries slamming open and
causing a momentary lean condition until the fuel flow could catch up with the air.

The air-valve on the AVSs and spring selection with Vacuum Holleys are the same function.

The double pumper Holley is a carb of its own...it has squirters on the secondaries that
shoot as the secondaries start to open....takes care of the lean problem. Some models would
open everything at the same time and squit all 4 throats.

People sing the praise of the Holley Double Pumper....I guess I've never had a car light
enough with enough power to make them work.

When we raced my 2-ton charger years ago, we ran 3/4 of second faster with a vacuum six-pack
setup than with a "six-shooter" deal....we wore out a set of slicks trying to to make the 
triple pumper work better....ended up with the vacuum deal...sold the other setup....

Swap meet AFBs.....not melted...no bullet holes...all pieces there....buy them before I get there.

AVS...4640 is a nice number...automatic 440 1969...biggest throttle plates....I've got two but
still willing to pick up a couple more...

rob in phx
65 satellite

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