RE: IML: Help: 1968 Coupe Carburetor Installation

["Dick Benjamin" <dickb@xxxxxxxxx>]

To add a little to Mike's excellent reply, the two vacuum fittings mentioned
are "ported vacuum" and manifold vacuum.  The proper one for the distributor
vacuum advance is the ported vacuum, the other must be capped if it is not
in use.

Ported vacuum can be identified by the characteristic that there is no
vacuum present at idle, vacuum appears only when the throttle is partly
opened, in other words when you are stepping on the gas a bit.  This is
because the distributor is not designed to provide vacuum operated spark
advance except during acceleration.

Of course if these two ports are exchanged, the initial timing can be
adjusted back to specification at idle, but if this is done, the car's
performance will be quite poor, as advancing the throttle will reduce the
vacuum advance, not increase it.  Off idle performance will be noticeably
reduced.

Dick Benjamin

-----Original Message-----
From: mailing-list-owner@xxxxxxxxxxxxxxxx
[mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of Mike Pittinaro
Sent: Wednesday, September 29, 2004 1:15 PM
To: mailing-list@xxxxxxxxxxxxxxxx
Subject: Re: IML: Help: 1968 Coupe Carburator Installation

> I am replacing the carburetor on my 1968 crown coupe
> with a new Edelbrock Performer series carb.  I have
> the Carb, the throttle cable and linkage cable
> parts.
> Am I missing anything?  Spacers? Fuel lines?  any
> help would be great on this... thanks. 

Not hard...I recently replaced my Holley 4160 with the
Carter AFB..similar swap, I imagine.  The edelbrock
performer requires a fuel hose be spliced into your
existing fuel line.  Your current carburetor probably
uses a screw in fitting.  You will need about 2 or 3
feet of 3/8" fuel hose, and two screw clamps for the
ends, to connect the existing fuel line to the carb. 
Make sure you put a fuel filter in the line!

You also need the Mopar automatic transmission
kickdown linkage adaptor, from Edelbrock.  

Other than that, the carb will bolt onto the existing
studs, the throttle cable will attach right on...you
may need to plug some of the vacuum connections to the
carb with little rubber stoppers, if they won't be
powering anything.  You will have two ports on the
front of the carb for distributor vacuum
advance...plug one, use the other.  One is a timed
advance, the other is a full advance.  I find my 67
runs better off the timed advance, but its a bit of a
trial and error thing.

=====
--Mike Pittinaro

Beautiful Boxcar
American Grandeur and
Danish modern Style


		
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