Carter Thermoquad

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Mar 20, 2002 | 08:42 PM

335clevo

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Carter Thermoquad

Group,
I have just got a Carter Thermoquad carburettor for my Cleveland. There are quite a few people who say they are no good, but I have a book called "How to modify your Ford" and it has several pages which more or less say 'Do not change your Thermoquad for another carb' It also says that the biggest problem with the thermoquad was people didn't know how to tune them properly. Any Ideas?

Thanks,
335C

ps, Does anyone know of a site on the net with an exploded diagarm of a Thermoquad, because my manual doesn't have a lot on it.

Mar 20, 2002 | 08:55 PM

Franklin2

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From: Virginia

Carter Thermoquad

You just found out the problem with carbs that are not popular. Yes, nobody knows how to tune them because they are not widely used for high performance and there are not many books or info on how to do it.

Mar 20, 2002 | 10:00 PM

Mil1ion

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Carter Thermoquad

http://www.google.ca/search?q=adjusting+a+thermoquad+carburetor&ie=ISO-8859-1&oe=ISO-8859-1&hl=en&meta=

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Mar 21, 2002 | 02:49 AM

xyfalcon500

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Carter Thermoquad

When I got my 351C rebuilt a bit over a year ago, my engine builder (who has a lot of experience with Fords, that's the main part of his business), asked me if my old thermoquad was in good shape or not, and when I said no, it needs a rebuild, he told me to junk it, and just get a Holley or similar. He said that if my Carter (which is a spreadbore) had been in good running condition it would have been fine to use, even on a performance application, because they can flow up around 850cfm or so (I can't remember exactly, but it was a LOT). As it was, I bought a new Holley 750 sq bore with vac sec; I'm glad I did this in retrospect because everyone knows how to tune a Holley, but as pointed out above, the Thermoquad is a lot less well known and you might have trouble getting it set up just right.

Mar 22, 2002 | 08:56 PM

Notstock

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From: Cincinnati USA

Carter Thermoquad

Find your local Mopar nut.Mopar guys use them in stock drag racing classes. It's not a sure thing but it's a place to start,they might even be able to help you with some mods. I know Mopar Muscle magazine did an article on Thermoquads about 2 years ago.I also believe Holley's custom shop can rebuild it for you(check with your local speed shop).