<VV> 140 with a single 4 bbl.

[Sethracer at aol.com]

Tom - There were two different multi-part manifolds made for the center  
mount Corvair conversions, the IECO was designed for a small Carter AFB 
4-barrel  and had the narrower bolt pattern for the carb. The Edelbrock manifold 
had  a wider bolt pattern - Indeed, some had both patterns. If your 390 
Holley bolts  directly to the manifold - not using any kind of adapter, you have 
the wider  bolt pattern. Some models of Carters had dual patterns as well. 
The  Edelbrock carb is really a copy/re-design of the old Carter AFB. If  the 
bolt pattern is different, there are lots of thin adapter plates  
available. I think the Edelbrock uses the same secondary throttle plates  inside the 
air flow of the secondary air inlets. Until the airflow through  the primary 
barrels passes a certain point, the secondary bores handle almost no  air 
flow, so I think you are safe with the 500. You will likely have a fuel hose  
connection change, be sure to use very good quality fuel hose. If your 
linkage  is okay now, it will probably be okay with the new setup. I know in 
Florida you  may not need much of a choke, but the 1960 models had a neat feed 
to  the choke that might work well on a 4-barrel system. Check out the 60  
model for the idea.
 
Seth Emerson 
 
 
In a message dated 1/15/2012 12:05:27 P.M. Pacific Standard Time,  
viviandudak at bellsouth.net writes:

have a  140 with the single 4 bbl Holley 390 carb and I want to switch it 
to an  Edelbrock 500 carb. So just by looking at it, it looks to be somewhat  
different. My questions are, has anyone done this swap and what did it take 
 and was there anything or extra parts needed? Any info on this would be  
greatly appreciated.
Tom in Florida
140 4bbl 4spd
Corsa Vert.