Carburetor Base Gasket

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Nov 19, 2006 | 12:30 PM

SmokinBBC

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Drifting

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From: Oak Ridge NC

Carburetor Base Gasket

Mr Gasket has 2 base gaskets. The 4 hole and the open center.

Which one is correct for my '70 quadrajet?

Stock manifold.

Thx,

Paul

Last edited by SmokinBBC; Nov 19, 2006 at 12:34 PM.

Nov 19, 2006 | 05:31 PM

lars

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From: At my Bar drinking and wrenching in Lafayette Colorado

Does your manifold have the curved exhaust groove crossover ("smiley face") that runs from side to side just forward of the primary throttle holes?

Nov 19, 2006 | 06:00 PM

SmokinBBC

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Drifting

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From: Oak Ridge NC

Quote:

Originally Posted by lars

Does your manifold have the curved exhaust groove crossover ("smiley face") that runs from side to side just forward of the primary throttle holes?

Yes it does.

Nov 19, 2006 | 10:55 PM

lars

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From: At my Bar drinking and wrenching in Lafayette Colorado

Then neither gasket is right for your application. You need a special gasket "pack" that consists of a composite high-temp lower gasket with a groove in it, followed by a stainless steel reflective heat shield, and then finally a third 4-hole gasket on top of that with a special shape to cover the shield and groove configuration. To the best of my knowledge, I'm the only source for the complete 3-peice gasket kit, and I get each of the 3 gaskets from a separate source. Drop me an e-mail for info - I can send you the right gasket setup for about $13. If you use anything else, you will suck exhaust gas down your intake.

V8FastCars@msn.com

Nov 20, 2006 | 10:09 AM

BlueL36

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From: End of the Ike IL

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SmokinBBC- take Lars up on his offer. It will not only protect your carb, but will make it soooo much easier to get your car to run right. Since I put his gasket pack on mine 3 years ago, I've not had a bit of problems with my carb.

Nov 20, 2006 | 11:30 PM

SmokinBBC

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Drifting

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From: Oak Ridge NC

Lars,

Email sent

Here is a pic of the top of the manifold

Paul

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Last edited by SmokinBBC; Nov 20, 2006 at 11:42 PM.

Nov 21, 2006 | 09:48 AM

lars

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From: At my Bar drinking and wrenching in Lafayette Colorado

That's not the exhaust crossover manifold - that's a standard manifold with no exhaust groove. You can use the standard 1/4" thick open plenum gasket on that.

Nov 21, 2006 | 10:47 AM

SmokinBBC

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Drifting

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From: Oak Ridge NC

Thanks Lars.

Good thing I got the pic!

One more question...if I might.

I have a stainless steel heat shield sandwiched by 2 gaskets on it now. All are open center. The approximate combined thickness is about 1/4 inch. (1/8 thick gasket 1/16th thick shield and 1/16th gasket with the thin gasket on the bottom).

I did this to eliminate a perculating problem in the carb that occured after shutting it down. The shield is the one that was used on Cali. emissions vettes..it is the correct GM part. By the way...no more perculating.

Do you see a problem with this set-up?

Thanks for the help!

Paul