New Demon Carburetor
 

This carb looks vaguely familiar but I can't quite put my finger on it. Hummmmm? Any ideas? Jim

http://www.dragzine.com/news/demon-c...on-carburetor/

Re: New Demon Carburetor
 

Good Lord! Stinking Thermoquad!

Re: New Demon Carburetor
 

Hey! Watch your mouth!! TQ's are fine pieces of racing equipment! I know some guys who love them! Jim:eek:


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Re: New Demon Carburetor
 

Easily half I've torn down to rebuild the small cups that had been glued in place (very reliable way to build something) under the primary jets fallen off. They made Quadrajets look really good. LOL

Re: New Demon Carburetor
 

Shows how much you know smarty! Those O-rings aren't GLUED, they are pressure fit once you put the top back on. Your GLUE must be from the great gas you were using! Q-Jets are cool to! Anybody can make a Holley run! Jim


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Re: New Demon Carburetor
 

Looks like a cross between a T-Quad and the old Holley three barrel !

JimR

Re: New Demon Carburetor
 

Anything is better than a Holley,i mean cylinder washer

Kevin

Re: New Demon Carburetor
 

I dont think Carter will be filing a lawsuit as Holley did, Oh and is it gonna be legal in stock too....haha

Re: New Demon Carburetor
 

Actually Holley bought the rights to the Thermoquad from Carter several years ago. This could be the "new TQ". Just a guess. Holley had said they were going to remake the TQ but with variations. Haven't heard anything about it lately. Jim

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Re: New Demon Carburetor
 

The pieces I'm talking about won't press back in, they had white glue holding them in place. Those weren't O rings, they didn't go inside when assembled, but we're very visible. If those were O rings, they were harder than my wife's head and didn't seal worth a damn. When those fell off the well below them in the base plate would, of course, be full of fuel. Real dumb way to build a carb. If there was ever a worse design, it had to be the Ford Variable Venturi.

Btw, I love Quadrajets. Made good money rebuilding Quadrajets.

Re: New Demon Carburetor
 

OK, I got ya. Yes those fuel wells are epoxied in. I can say I have never seen one that has fallen out on it's own. The epoxy does get old and if it is hit or pried it will break off. Easy to fix.The TQ actually is a very good piece. All the MoPar small and big blocks from '71 until the fuel injection change over used TQ's. Some of the fastest class cars still are equipped with them. I have been using and building them for others since they came out. Every factory fuel system has it's faults, fuel injection (my last two race cars were injected) included. Call me crazy, I like the Thermoquad. Jim

P.S. I have made good money building TQ's for racers also!

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Re: New Demon Carburetor
 

Does anybody know that FORD used a Thermo Quad in production?? 1974 Lincoln 460 for California.

Re: New Demon Carburetor
 

Jim, I didn't build them for race cars. Just overhauls for people's work cars. The base didn't touch those in the problem carbs. I used modeling clay to measure the space in there, and found some thin rubber to cut pads from. Put those in all my rebuilds. Devon epoxy & those pads took care of them. I did that work for 40 years. Many customers were with me the whole time.
It was an easy test. If the idle adjustment screws had to be all the way in to get the C.O. (Sun 4 Gas Infrared exhaust analyzer) close to where it belonged, those were leaking. Just like Holley power valves or QJet metering well plugs.

Re: New Demon Carburetor
 

Sure, and Grace Howell ran that combo in a SS/GT Mustang for several years. How do I know that? I'll never tell. Jim:rolleyes:


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Re: New Demon Carburetor
 

I understand Ed. Plastic Welding is a much better fix now for race carbs. The were originally epoxied in order to be removable for cleaning out the primary jet fuel well. Replacement pieces are available still. Jim

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Re: New Demon Carburetor
 

'78 was the last year for big blocks, but the small block trucks had Quadrajets for a little while before the fuel injection took over.

Considering the resemblance and difficulty in finding parts, I couldn't help but wonder if Holley and NHRA would consider building the correct sizes and allowing them like they did with certain Holley/Quick Fuel carbs.

Re: New Demon Carburetor
 

You're right Myron, also all of the Police package vehicles (small blocks) used Q-Jets during those years. I can't wait for these new Demon carbs to become available. Maybe the jets will interchange, that would help greatly. Jim

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Re: New Demon Carburetor
 

86-87 Large Q Jet on 360 Trucks, 89-90 Small Q Jet. Also mid 80s 318 in
Cars.

Re: New Demon Carburetor
 

I guess you just have not found the right person to build one... The new Demon looks like it will be a good street car carb, notice the double boosters like a QJet, they will help with economy.

Re: New Demon Carburetor
 

Holley and Raybestos were bought by another company and that reminded me of this thread and the TQ look-a-like. Anything new about the Demon TQ?

Hope nothing bad happens to Holley after all the progress it's made since almost going out of business several years ago.

http://www.moparmax.com/news/2012/news-vii_7-3.html

Re: New Demon Carburetor
 

I have one in great shape