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Demon carburetor

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Old Sep 16, 2009 | 05:30 PM
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vaffanculo
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Default Demon carburetor

Does anyone know what brand of carburetor was original in the 1971 Demon 340. I noticed that I have a 4 barrel Holley which I can bet is not original.......can not wait to see what else is missing,
FF
 

Last edited by 1969CoronetR/T; Sep 16, 2009 at 05:32 PM. Reason: mispelled
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Old Sep 18, 2009 | 06:14 AM
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The carter thermoquad was the OEM carb on a '71 Demon 340
 
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Old Sep 18, 2009 | 08:25 AM
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Great, I have heard so many good things about the thermoquad. I ordered an Edelbrock and will look into a remanufactured (reconditioned?) Carter for numbers..
Thanks mr340,
FF
 
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Old Sep 18, 2009 | 10:35 AM
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mr340,
Do you know if it was a spread or square and would it matter which one I put on the 340?
FF
 
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Old Sep 18, 2009 | 03:32 PM
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The Thermoquad is a spread bore. My Demon came with a Carter AVS. I dont know why, manuer tranny maybe?

By the way, I am not ignoring you, I just havent made it out to the farm to get photos of my Demon yet. It is A jig saw puzzle at the moment, all taken apart to get ready for paint.
 
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Old Sep 18, 2009 | 06:15 PM
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I got an Edelbrock square bore as they do not make a spread bore and mine is a manual, also. Will a square bore make much difference, detrimental or beneficial? No problem on the photos, but all the Demons I see have hood scoops on them. Mine does not for some strange reason...
FF
 
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Old Sep 20, 2009 | 09:01 AM
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The scoops were optional. my last Demon 340 had rear spoiler. hood pins, but no scoops from the factory.
 
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Old Sep 20, 2009 | 09:38 AM
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mr340,
Do you know if a square bore will work in it as it came with a spread bore and what differrence it would make?
FF
 
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Old Sep 20, 2009 | 11:19 AM
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The intakes are different, as are the bolt patterns. If you already have a Holley on there, a square bore carb will work just fine (unless it is a spread bore holley) A square bore has all 4 butterfly's the same size, a spread bore has two small butterflies and two large butterflies in the back. Most after market intake manifolds come with the ability to run either type of carb.

* I looked at my engine and intake, both are dated 1970, I guess my Demon was an early one and got a 70' engine set up with the AVS carb
 
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Old Sep 20, 2009 | 11:22 AM
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Originally Posted by mr340
The scoops were optional. my last Demon 340 had rear spoiler. hood pins, but no scoops from the factory.
I have a couple of extra hoods, one has the duel scoops, I might part with it, dont know what i am going to do yet, mine is awaiting paint, If I go with a glass hood, I will probubly sell the others.
 
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