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Old 07-14-2008, 06:28 PM
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holley or demon

i'm building a stout running sbc 350 just wanting some carb opinions i have a new demon 650 i picked up with an air gap manifold cheap but i've heard good and not so good i've had holleys on every hot rod i've had , but ... what do you all think please give me your input good or bad thanks in advance ....

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Old 07-14-2008, 06:49 PM
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Throw out everything you know about tuning Holleys! Buy a book on Demons or follow the instructions implicitly. Demons like a lot of initial timing and they flow much more than the size indicates, in other words a 650 flows alot more than 650. When you get it dialed in you will be very happy. People run into problems when they apply their Holley tuning tricks to a Demon. The minute you start thinking Holley while working on your Demon, you are done. Holleys are great carbs but you will love your Demon.
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Old 07-14-2008, 09:45 PM
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Not a big fan of Demons
BIG fan of Holleys
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Old 07-15-2008, 04:30 AM
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all the problems Ive had with BG carbs Ill always go with a Holley
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Old 07-15-2008, 05:33 AM
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My Speed Demon is the dog´s bollocks, fantastic, I love it but then I came from a computer Q Jet.
The only trouble I´ve had was a blown power valve but once that was sorted it behaved perfect.
Take time to set it up and don´t get too far away from base settings, you can download your carb manual here.
Important I found was to set all four butterflies properly showing the correct amount of transfer slot.
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Old 07-15-2008, 06:12 AM
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I had issues with garbage in the bowls (metal machining chips).
but after that it ran ok .
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Old 07-15-2008, 12:06 PM
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Quote:
Originally Posted by dawg
I had issues with garbage in the bowls (metal machining chips).
but after that it ran ok .
Dawg.. I have addressed this before with you in another thread . The problems with the chips was in the past as it was a couple of years ago. We have openly admitted on many forums including this one that there was a problem and we addressed it with the result being that we very rarely see a claim for it now. Some of these measures included changing the way that parts were being carried and stored throughout the building as we found they were being contaminated in this manner, moving the gaskets off of the assembly benches and into a dispenser so they wouldn't pick up shavings from the bench, installing vacuum systems under assembly tables and the addition of a time locked sonic wash for the metering blocks.
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Old 07-15-2008, 12:08 PM
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Quote:
Originally Posted by hdscooters
i'm building a stout running sbc 350 just wanting some carb opinions i have a new demon 650 i picked up with an air gap manifold cheap but i've heard good and not so good i've had holleys on every hot rod i've had , but ... what do you all think please give me your input good or bad thanks in advance ....
Biggest thing is to make sure you review the manual prior to installing it and follow the instuctions found inside it. If you did not get a manual with it they can be downloaded from our website. Also make sure you have the proper amount of base timing in the motor as well before making any adjustments. If you have any questions or issues feel free to pm me.
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Old 07-15-2008, 04:10 PM
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They must have some issues. Summit quit carrying them awhile back.
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Old 07-16-2008, 12:32 AM
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That was not over quality, I believe it was due to Summits low pricing.

I´m hurting from that as Summit is my best source for parts, Jeg´s kill me on the way they ship stuff, one way high price.
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Old 07-16-2008, 06:04 AM
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Quote:
Originally Posted by scapegoat
They must have some issues. Summit quit carrying them awhile back.
Actually that would be incorrect because Barry closed Summits account due to the fact that their returns were 10 times higher than that of our other 400+ dealers including other large retailers.
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Old 07-16-2008, 08:45 AM
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I stand corrected.
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Old 07-16-2008, 08:55 AM
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Quote:
Originally Posted by malc
I stand corrected.
Wasn't actually correcting you on that one but rather scapegoat in that he said Summit quit carrying us when it was actually the other way around. We closed their account.
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Old 07-16-2008, 09:04 AM
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Maybe Summit take stuff back too readily knowing the manufacturer will foot the bill.
Good for the customer.............if he REALLY has an issue with the product.
I reckon too many folks give up too soon, they all expect stuff to bolt on and work right out of the box.
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Old 07-16-2008, 09:11 AM
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Quote:
Originally Posted by malc
Maybe Summit take stuff back too readily knowing the manufacturer will foot the bill.
Good for the customer.............if he REALLY has an issue with the product.
I reckon too many folks give up too soon, they all expect stuff to bolt on and work right out of the box.
Exactly and with the excessive amount of returns from them Barry would have had to raise the pricing to everyone else to cover it had it continued which he did not want to do. We took several of the returned carburetors and bolted them directly onto our in-house cars and they worked fine and had nothing wrong with them but yes sometimes the end user gives up a little quick or didn't realize they have to tune and in a lot of cases we see on the phone lines it can be something as simple as not having enough base timing in the motor while other cases it is even not carbureted related.
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