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Re: Carburetor problem

To: waclarke@twcny.rr.com, mgb-v8@autox.team.net
Subject: Re: Carburetor problem
From: Keith Grider <kgrider@wowway.com>
Date: Thu, 08 Jul 2004 16:52:05 -0400
In-reply-to: <53be6d53786b.53786b53be6d@nyroc.rr.com>
References: <53be6d53786b.53786b53be6d@nyroc.rr.com>
Reply-to: Keith Grider <kgrider@wowway.com>
Sender: owner-mgb-v8@autox.team.net
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7) Gecko/20040616
I have not had this problem before, but do not push my skylark nearly
that hard. Could it be that you are running too high of fuel pressure
for the Carter? I know that mine will flood with the current fuel pump
unless I put in a pressure regulator. The carter float and needle seat
is sensitive to this...

Keith

waclarke@twcny.rr.com wrote:
Hello, I have a problem with a Carter 500 (BGT 4.2 Buick) flooding
over in autocross events that I am trying to solve.  I am hoping
someone on this list may have an idea.

The problem seems to be gas pooling in the intake and progressively
getting worse during subsequent runs.  It became quite evident after
the purchase of some racing tires.  I suspect it is because the
braking is much more severe.  I dont think its from cornering since
the narrow width of the bowl on the sides seems to be optimum for
cornering.

The roughness and black smoke as a result of this condition clears up
after getting out on the highway and running with the secondaries
open for awhile.  Then its good for another run as well as running
great in all other circumstances.

I have tried lowering the float levels.  I also tried to adapt a
Holley 390 but changed my mind because of the complexities.

I'm thinking about fuel injection for next year so my objective is to
try to modify this carburetor for now.  Any suggestions?
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