Holley vs. Demon
Thread Starter
Drifting
Joined: May 2004
Posts: 1,258
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From: Huntsville Alabama
Holley vs. Demon
I know this has been talked about here many times. But i need help on choosing a carb. I am looking at the Holley Street Avenger series vs. the demon carbs. The setup is edelbrock performer rpm top end package with rpm air gap manifold rpm heads and rpm cam. So what is the carb of choice street avenger or demon and what cfm thanks.
Pro
Joined: Feb 2004
Posts: 564
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From: Pittsburgh PA
Originally Posted by C3 Stroker
CFM choice depends on your engine, but I prefer Demon based on previous experience with Holleys.
I would recommend the 650 Speed Demon, not the 750, as they tend to under-rate their carbs... I picked up a 750 for my 427 (with fuel line) for $400 off of EBay- do a search, there's one guy there who sells hundreds of 'em... And he's pretty sharp on them, too.
650 Speed Demon! You won't regret it!
Melting Slicks
Joined: Jan 2003
Posts: 2,712
Likes: 31
From: Shreveport LA
LA Events Coordinator
IMO I'd go with the Holley. I have a Street Avenger on mine...bolted it on right out of the box; easy to adjust and maintain. I have had mine for the past 2 years....no probs....and I drive it EVERYDAY...come rain or shine. Engine fires right up....the electric choke has not failed me yet.....
Don't know anything about the Demon...other than what's advertised.
Don't know anything about the Demon...other than what's advertised.
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Pro
Joined: Sep 2004
Posts: 690
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From: Madison WI
From what I've read, the Street Avenger is the ultimate bolt on and go carb. I have a 670 and have been pretty happy with it, there are a couple small bugs with my motor (little bit of hesitation when cruising and under acceleration), but that's getting resolved and is quite possibly not even the carb. You can probably extract a little more power from the Demon, but it's going to take some tuning.
Pro
Joined: Jan 2005
Posts: 535
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From: Southaven MS
edelbrock
Originally Posted by Silver00V6Camaro
i have a buddy that has a edelbrock carb and he has more problems with that thing running rich and keeping it in tune.
Melting Slicks
Joined: Sep 2004
Posts: 2,412
Likes: 3
750 Speed Demon would be my recommendation. Call BG and see what they recommend. Q-Jets are better for light street driving, Demons are better for performance IMO. Also, Demons suck gas. But not as bad as Holleys do from what I hear.
Team Owner
Joined: Sep 2003
Posts: 88,393
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From: eville in
Originally Posted by 1972warship
I have an edelbrock 750 (1411) and cannot get it to stop running rich at low rpm...if I do it runs too lean at 2000+..(I have a wide band O2 sensor). Anyway I have my eye on the 750 speed demon with annular boosters...might want to check that one...I have no experience with demons so I cannot tell you any personal experience..I have heard that you will want to open it up to make sure there are no metal shavings..
Pro
Joined: Jan 2005
Posts: 535
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From: Southaven MS
Originally Posted by comp
does your 1411 run better some days like it's weather related ???
Thanks
