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Post Info TOPIC: Demon versus Holley carb


Poncho Master!

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Demon versus Holley carb


Some years back, when I was gathering parts for my 496 (all forged internals, big hydraulic roller cam, Brodix aluminum heads, etc.), I bought a Mighty Demon 850 cfm 4bbl. No choke, double-pumper, recommended as part of a 600HP build in a hot rod magazine.

 Demon.jpg

I had always used Holley 4bbl carbs, double-pumpers in my road race Corvette and my L-88 clone 427 street Corvette, and the original carb that came on my 66 Chevelle SS396 and my 67 Corvette 427. So now I am rethinking my original purchase maybe get a Holley HP850 cfm double-pumper instead.

 Holley.jpg

Anybody have experience with the Demon? Better yet, Demon versus Holley? Power? Good street manners? etc.

All input is greatly appreciated.

Thanks, Dave

 



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56Pontiac  1956 Pontiac Pathfinder 2dr sedan, 496 - dyno'd 545 hp, stick shift, 4.11 posi - Hot Rod

  1964 Acadian Beaumont SD convert, 283 - factory 195 hp, Powerglide, 3.08 10-bolt - Cruiser

  2012 US-built crew cab truck - Daily Driver and Boat Trailering



Guru

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go with the holley  .... parts every where...



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Uber Guru

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Did you know that Holley owns Demon?

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Poncho Master!

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65Camino wrote:

Did you know that Holley owns Demon?


I just found that out ... 7 years ago that was not the case ...

Dave



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56Pontiac  1956 Pontiac Pathfinder 2dr sedan, 496 - dyno'd 545 hp, stick shift, 4.11 posi - Hot Rod

  1964 Acadian Beaumont SD convert, 283 - factory 195 hp, Powerglide, 3.08 10-bolt - Cruiser

  2012 US-built crew cab truck - Daily Driver and Boat Trailering



A Poncho Legend!

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Go with the Demon     you will love it   



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Poncho Master!

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I have had my 650 cfm Demon on my 355 sbc in my Canso SD for 9 years and have had no problems with it. It works flawlessly and was very easy to initially set up with vacuum guage (4 ports for vacuum setting). My 2 cents worth.

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Uber Guru

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I am not a serious racing guy, had a 283 with a stock Rochester 4 GC that I could never get to work good. Never had a Holley (other than a 3.9 87 Dakota with a 2 barrel, but I'm sure that doesn't count) and someone who knew his stuff suggested a Quick Fuel. I got one and it worked perfect right out of the box. It also takes all the Holley parts, but looks very well made with a lot of billet stuff.

Don

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63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC.
1963- Pontiac top selling car in Canada

Mahone Bay, NS Still not old enough to need an automatic

tc


Guru

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I think I would stay with the demon carb....

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Poncho Master!

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Thank you all for your input. I have the Demon in hand, so I will stick with it, also avoiding shelling out another $500 for a different carb.

Dave

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56Pontiac  1956 Pontiac Pathfinder 2dr sedan, 496 - dyno'd 545 hp, stick shift, 4.11 posi - Hot Rod

  1964 Acadian Beaumont SD convert, 283 - factory 195 hp, Powerglide, 3.08 10-bolt - Cruiser

  2012 US-built crew cab truck - Daily Driver and Boat Trailering



Veteran Member

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They all make us happy when they work, they all make us mad when we get bad fuel and plug them up I had a holley 650 on my small block and have a 850 quick fuel on my big block both work great and have friends with the demon that swear by them. I believe demon and quick fuel are made by former holley employees.

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