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Demon carbs, vs. Holley?

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Old Dec 18, 2010 | 04:21 PM
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Demon carbs, vs. Holley?

Picking out a carb to cap off my engine project. I know about what carb will be good for my engine, but now I need some help picking which of a few carbs would be best for ME, as the tuner, and driver. This will be the first NEW carb I've ever owned, but I have basic experience tuning a Holley 4, an Eddie 4, and a Motorcraft 2, idle mixture, choke, just the simple stuff needed to run. I love to learn about the fine little points of stuff, but I don't want to get such a complex carb that it is too unforgiving for me to learn on. I also do get frustrated pretty easily. I'd love to end up with a carb that I can really tune effectively for specific days if need be. I make some looooong hiway trips a few times a year and need to squeeze out every MPG, but other times I just wanna dump everything I have onto the rear wheels.

I'm looking at a Demon, a couple Holley's, and maybe an Edelbrock. I want vac secondaries obviously, and have always had electric chokes, but think once I learn, I might like manual better.

I really really like the 650 speed demon, but probably just because it's not the conventional Holley or Edelbrock, and I like being different. I'm worried it might not be easily enough to tune for a beginner like me.
Barry Grant 1282010VFE Demon Speed Demon Carburetors

I like 3 from Holley, the base model 650, the street avenger 670, and the ultra street avenger 670. I wouldn't buy the base model, as I have an old base model 600 that I may rebuild for a spare and want something different, and for 150$ extra the ultra street avenger seems dumb, but they look soooo cool, and do have a few extra "features".
Holley Performance Products 670 CFM Four Barrel Carburetor 0-80670
Holley Performance Products 670 CFM Ultra Street Avenger Four Barrel Carburetor - Black™ 0-86670BK

As for the Edelbrocks, from what I've read and been told, these might be best for me right now, they sound easy to sort of set and forget, but I don't know if they'd have the tunability to satisfy me down the line, once I learn and try more, and they don't have one that really hits me as perfect for my engine either, as far as cfm.

Give me your opinions, experiences, whatever you've got!

Thanks, AleX
 
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Old Dec 18, 2010 | 06:37 PM
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I havent messed with the 4 barrel Demon carbs, But I run a 2 barrel on my 78 F150 and Love it. It was a little touchy getting it tuned to 5000 feet but once that was done it is great. I would highly recommend the Demon line.
 
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Old Dec 18, 2010 | 06:49 PM
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Day to day reliability, I would go with Motorcraft or Edelbrock.
 
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Old Dec 18, 2010 | 09:20 PM
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I have experience with Eddie and Holley and all my brothers (who are in to mud racing) have pretty much experienced all and this is what I know. Road Demons seem to be a little touchy with tuning and getting them just right. They are nice Carbs, but not as good as Holley. Holley is a great carb. It takes a little more setting up, but they are pretty straight forward and once tuned they run great. The only downfall I've experienced with Holleys, is that they are more cold blooded than Eddies. Eddies tend to be "right out of the box" tuned and do Okay, but just don't seem to run as well as a tuned Holley carb and you'll most likely need a spacer between the intake and carb so the heat doesn't boil the fuel and flood itself out (at least that is what I experienced). If you go with a manual choke carb, you can always add on an electric choke if need be. I have a QuickFuel carb (which pretty much is based on a holley design) and I like it.

I don't think you can go wrong with either carbs you get, but I do think Holley and Eddie are probably the most user friendly of the carbs, but that' me.
 
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Old Dec 18, 2010 | 10:16 PM
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I second bucks
 
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Old Dec 18, 2010 | 10:28 PM
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I would go Holley myself they tend to be higher quality the BG's.

I would start with a used carb of your choosing, and have it re-built to meet your specs. If you have a professional shop in your area.

I like PC myself and they do the shipping. Performance Carburetors - Custom Holley Carb Specialists
 
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Old Dec 18, 2010 | 10:30 PM
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I just bought a reman holley from a place in Florida. They built it and then put it on a running engine and tuned it. It comes with a lifetime warranty. It looks brand new.

I got it for 170 compared to 385 at the parts stores.
https://www.ford-trucks.com/forums/1...read-this.html
 
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Old Dec 20, 2010 | 08:14 AM
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I'm running a 750cfm Demon on my 460 and couldn't be happier with it. It's a lot like a Holley except there are no cast peices, already has site glasses, reusable gaskets etc. I've always ran Holley's on other vehicles and really like them so thats probably why I took to the Demon so easily. I also have a 625 Demon that is currently not on anything, I just got a great deal so I bought it.
 
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Old Aug 12, 2020 | 06:58 AM
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I'm in the process of sourcing the intake to accommodate a Holley Viper (EFI). This upgrade changes the game for the ole carby. If funds are available, i'd go this route.
 
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Old Aug 12, 2020 | 08:54 AM
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750 speed demon is an accurized holley and I really like mine. Although I think they may mave moved manufacturing to China.
 
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Old Aug 12, 2020 | 05:03 PM
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You can't beat Holley. they'll be around when all the me too brands are forgotten.
 
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