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I have a Barry Grant Demon (650) that came with a recent parts purchase. So far I'm not sure I like the thing. I've had to pull it several times (was brand new in the box) for float issues, jet problems, and now floods intermittently though the regular is set at 7 pounds.

Pulled it yesterday and put a rebuilt Carter AFB in its place. Runs MUCH smoother but has no serious power at WOT. The only time the Demon seems t orun right is WOT, otherwise at idle it just sucks.

-shoe
 

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out of all of my friends, only one person liked a Demon, all the rest hated them because of problems that you are describing. I haven't had any personal experience with one, but I based on what I've seen, I wouldn't buy one. A traditional mechanical secondary holley would be a good option, or if you have a little more $$$ a street hp holley would be a great upgrade.
 

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In New Zealand our speed shops obviously got the rejects from you guys lol
a mate and myself went and bought new 625 demon jnrs...What a complete waste of time and money.the exact problems as said above.the speed shop didn't want to know about them either.....another mate has a 750 double pumper demon and it seems to be good...May be its only the smaller ones that are rubbish??
since then ive fitted a 454 with a 650 holley double pumper....and have had no issues and a completly different enjoyment driving..
Gav
 

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contact Don Gould at FBO systems, he is a demon guy and one of the best.
 

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I haven't had any issues with my Mighty Demon. If yours is one of the older ones there could be issues with shavings in the bowls. A quick tare down and clean up should fix it.

Look up BG Tech here or on Chevelles.com.... big help :yes:
 

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Not a big fan of them, love the holley though!!!
 

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If yours is one of the older ones there could be issues with shavings in the bowls.
This seems to be the only thing I have read about the BG carbs. I love the looks but will never buy one because of the problems that I have read about them.
 

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I had one and hated it from the start.
alot of speedshops dont carry them anymore due to the shoddy workmanship and never ending problems.
One thing barry grant is good for is marketing skills but as far as making a carb well the above speaks for itself.
BTW the carbs are made in mexico im told.
 

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I jran a Demon for a while and it ran OK until it developed a leak at the inlet to the fuel bowl. I replaced it with an Edelbrock Performer that I had laying around and it ran just fine until acouple of months ago when it started to flood out when I came toa stop at an intersection.

I just rebuilt another one of my Demon carbs and put it on the other day, because I'm trying to troubleshoot a problem I currently have with the Edelbrock Performer 650 flooding out. I hope I don't run into the same problems with the Demon you guys describe while I'm trying to figure out why my car runs like crap.
 

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I've tried 5 of them, all different models, and ALL were just too much trouble for the effort I, and others put into them, and definitely NOT worth the money. From the "tech's" at BG telling me there was NO problem, that the issues were in other areas, of ALL my engines, to just plain dirt and shavings, all sorts of different types of screws and fasteners (looked like someone raided a hardware store for them), to one even almost bending a rod from its never holding the needle and seat closed, they are, in my OPINION, just not worth the effort. 4 were replaced by various Holley's, 3 used and rebuilt, one new, and 1 Q-jet, and they work well, ALL of them, with NO engine issues as I was assured I had, and didn't.

So, my vote is swap meet for it, you don't need the aggravation. Sell it, or, better, GIVE it to someone you do not know, that way, you won't get it back when they get really upset with it, the BG "tech's" and YOU for letting them have it.

Regards,

Milton
 

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I've had my 825CFM Race Demon for 9 years and it works great. Never had any problems with it. :thumbsup:
 

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It's all about tuning and the problem is, just because a BG looks like a Holley doesn't mean you can tune it like one... Learn to tune it and it will perform for you. I learned the hard way, and finally took the time to watch the the tuning video and read the directions. The carb I fought with for hours was running and idling great in 15 minutes after that...
 

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It's all about tuning and the problem is, just because a BG looks like a Holley doesn't mean you can tune it like one... Learn to tune it and it will perform for you. I learned the hard way, and finally took the time to watch the the tuning video and read the directions. The carb I fought with for hours was running and idling great in 15 minutes after that...
luck..pure luck!!..doesnt work that way all the time..hahaha..ive watched the vids.and read also!! guess i just had a bad one!! oh well..:D..but every carb is different and you cant tune them all like a roch.or holley i agree!!
 

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I had one and hated it from the start.
alot of speedshops dont carry them anymore due to the shoddy workmanship and never ending problems.
One thing barry grant is good for is marketing skills but as far as making a carb well the above speaks for itself.
BTW the carbs are made in mexico im told.
Dawg you keep bad mouthing us on every forum you are on as well as putting out mis-information. If you are going to say something at least be truthful in it,please.

Our carburetors are made right here in the U.S. from U.S. zinc and parts unlike some of our competitors.
 

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This seems to be the only thing I have read about the BG carbs. I love the looks but will never buy one because of the problems that I have read about them.
Those issues were in the past and have been addressed on many boards yet people still talk about them like they are current. If you will search you will see where we have admitted to it , listed out what was done to correct it and in 99% of the cases you will see it was all stuff 2-3 years or older. If you want to look hard enough you will find the same complaints on competitors brands as well and I understand from a couple of our warehouses that they are starting to see the issue we had a couple of years ago showing up now on a competitors brand.
 

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I have a Barry Grant Demon (650) that came with a recent parts purchase. So far I'm not sure I like the thing. I've had to pull it several times (was brand new in the box) for float issues, jet problems, and now floods intermittently though the regular is set at 7 pounds.

Pulled it yesterday and put a rebuilt Carter AFB in its place. Runs MUCH smoother but has no serious power at WOT. The only time the Demon seems t orun right is WOT, otherwise at idle it just sucks.

-shoe
if it is flooding intermittengly that is typically only cause by picking up dirt or trash. Too much fuel pressure and it will flood all the time and same for the float adjusted too high. Does your car have a new tank in it or still have the original?
 

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It's all about tuning and the problem is, just because a BG looks like a Holley doesn't mean you can tune it like one... Learn to tune it and it will perform for you. I learned the hard way, and finally took the time to watch the the tuning video and read the directions. The carb I fought with for hours was running and idling great in 15 minutes after that...
Exactly and a lot of times though the guys don't want to take our advice and argue with us even though they are calling for tuning help. We had a guy the other day call for tech on a Holley because he didn't want to take their advice to which we gave the same advice as them. One of the biggest things we see is guys not running enough base timing or they try to make 3 or 4 changes at one time and get off the base line.
 

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tech at bg!!..you got any advice on the 3 deuce set im running?? i need idea's on getting it to run right?? any help is appreciated!!..its on a mild 427 sbc..
 

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tech at bg!!..you got any advice on the 3 deuce set im running?? i need idea's on getting it to run right?? any help is appreciated!!..its on a mild 427 sbc..
Send me a pm with some more info on the engine , what is is doing and how you have things set up and we'll see what we can do.
 

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Send me a pm with some more info on the engine , what is is doing and how you have things set up and we'll see what we can do.
thanks i will do it!!!!!!:thumbsup:
 
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