[DeTomaso] Engine Carburetion Experts
Will Kooiman
wkooiman at earthlink.net
Sun Dec 30 09:57:08 EST 2007
Your manifold is designed to accept either a spreadbore carburetor
(Rochester Q-jet, Holley Q-jet replacement) or a squarebore carburetor
(typical Holley).
I doubt that the mismatch will make any difference one way or the other.
Dan is right about the 2v/4v mismatch. A 4v intake will physically bolt
onto 2v heads, but the port mismatch will be terrible.
If it bugs you, you should consider the new dual plane air-gap intake made
by Edelbrock for 2v heads. I think they're calling it the Performer RPM. I
don't know if it will fit under your engine screen, but it would be a great
match for your engine.
-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of Dan Mixon
Sent: Saturday, December 29, 2007 5:30 PM
To: 'Orville Burg, II'; detomaso at realbig.com
Subject: Re: [DeTomaso] Engine Carburetion Experts
Orville,
Verify the P/N of your intake manifold. You may have a 4v manifold on your
2v heads. If you do, you'll need a new intake manifold due to port
mis-match.
If it is a 2v manifold that adapter is the correct one but with the added
height, your cover may no longer fit.
Dan
-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of Orville Burg, II
Sent: Saturday, December 29, 2007 4:25 PM
To: detomaso at realbig.com
Subject: [DeTomaso] Engine Carburetion Experts
I am currently in the process of replacing the Holley 750 carburetor on my
GT5-S in order to try to get it back into EPA compliance, being an '87 and
requiring passage of state and federal emissions criteria.
I purchased a Holley 4150 series 600 cfm, model 0-4776C, and added the
electric choke. I just pulled the old 750 off the manifold and noticed that
the interior pattern of the manifold didn't seem quite right. The manifold
is a Holley Street Dominator which I believe to be designed for a spread
bore carburetor, and my new carburetor is a square bore. Holley offers an
adaptor to allow usage of the square bore on a spread bore manifold, or vice
versa.
Here is a link to a picture of the manifold showing where flow has been in
the past. It appears to be slightly restricted.
http://www.pixclix.com/Micro-Wave/Pantera/Carburetion/Manifold-Top.jpg and
http://www.pixclix.com/Micro-Wave/Pantera/Carburetion/Manifold-Top2.jpg
I believe that I need the adaptor, Holly P/N 17-6,
http://www.holley.com/17-6, in order to minimize or smooth out the flow
constriction.
Might someone confirm that I am not out in left field on this project?
Thanks,
Orville, #9469
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