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Old 02-09-2007, 10:11 AM
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deciding between demon carbs

having a tough time deciding on which carb i wanna run with.

its a toss up between the 650 speed demon and the 650 mighty demon, both vac. secondaries. I'm leaning more towards the speeddemon for the cheaper price

here are the specs on the drivetrain currently:

355ci
10:1 Compression Ratio
Holley systemaxII alum. heads
Comp cams 270H magnum
Holley street dominator intake
MSD Pro-Billet distributor #8361
MSD Blaster2 Coil
MSD 6AL Ignition box
Edelbrock Thunder Series 650cfm AVS carb
Aeromotive Billet Fuel Pressure Regulator
shortie headers
K&N 4" Open Element air filter

3.73 gears
Eaton Limited-Slip Diff.

Th350 transmission
2800 stall torque conveter
B&M Stacked plate trans cooler
trans-go transpack

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Old 02-09-2007, 03:23 PM
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Spend the same money at a carb specialist and be way ahead.
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Old 02-09-2007, 04:00 PM
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I had a custom carb built by Pro Systems and they will definitely get the call for my next one.
Fill the tech sheet out for a free recommendation and price.

If your set on a Demon, Tech @ BG (from Barry Grant) is a member here, try sending him a PM.

Last edited by 71C10; 02-10-2007 at 06:23 AM.
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Old 02-10-2007, 11:02 AM
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Bump for Tech @ BG.
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Old 02-11-2007, 07:47 AM
Technical Support Barry Grant
 
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Quote:
Originally Posted by ocbaud
having a tough time deciding on which carb i wanna run with.

its a toss up between the 650 speed demon and the 650 mighty demon, both vac. secondaries. I'm leaning more towards the speeddemon for the cheaper price

here are the specs on the drivetrain currently:

355ci
10:1 Compression Ratio
Holley systemaxII alum. heads
Comp cams 270H magnum
Holley street dominator intake
MSD Pro-Billet distributor #8361
MSD Blaster2 Coil
MSD 6AL Ignition box
Edelbrock Thunder Series 650cfm AVS carb
Aeromotive Billet Fuel Pressure Regulator
shortie headers
K&N 4" Open Element air filter

3.73 gears
Eaton Limited-Slip Diff.

Th350 transmission
2800 stall torque conveter
B&M Stacked plate trans cooler
trans-go transpack

On your combination with the cam and intake you're using we'd recommend using the Mighty Demon carburetor. It will give you better tunability, and overall performance.
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Old 02-11-2007, 08:11 AM
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Dont go with a Demon
i had one and it was nothing but trouble, 500cfm vacuum sec
my boss where i work at said he tried running them on a racecar he built for a customer and he had nothing but problems with them, he said he swapped it out with a 750 holley double pumper and it fixed all his problems


the only thing about Demon carbs is that they are pretty, big whoop
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Old 02-11-2007, 11:51 AM
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Quote:
Originally Posted by mynuffinfutsitch
Dont go with a Demon
i had one and it was nothing but trouble, 500cfm vacuum sec
my boss where i work at said he tried running them on a racecar he built for a customer and he had nothing but problems with them, he said he swapped it out with a 750 holley double pumper and it fixed all his problems


the only thing about Demon carbs is that they are pretty, big whoop

i've heard they are just a pain to tune correctly, but once they are tuned they are awesome carbs.
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Old 02-11-2007, 11:55 AM
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Quote:
Originally Posted by Tech @ BG
On your combination with the cam and intake you're using we'd recommend using the Mighty Demon carburetor. It will give you better tunability, and overall performance.

wait.... i was just looking at the bg site and i noticed something. i thought you had a vacuum secondary mighty demon out? also, i see none of them come with any choke?

hmm....


its going in an '86 chevy c10 with a weight of 3950lbs.
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Old 02-11-2007, 12:19 PM
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The Vacuum Secondary Mighty Demons are available. They're working on a new website right now, however they should still be listed in the New Products section. None of the Mighty Demon series carburetors have a Choke tower.
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Old 02-11-2007, 12:46 PM
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i'm not sure if i need a choke or not. i mean, the truck is always parked in the garage unless i'm out somewhere with it, and it wont be driven in really cold weather.


how much of a difference would it be performance wise between the mighty and speed demons?
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Old 02-11-2007, 01:11 PM
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ha, you dont need a choke
i run my old chevy in freezing weather (around 30 degree weather) and all i gotta do is let it warm up for 5 min, as long as it didnt get a big gulp of air (cause it would wanna sneeze) it would run fine i run a 190 degree thermostat
all i did is richen the jets up a hair in the cold
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Old 02-11-2007, 02:09 PM
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Quote:
Originally Posted by mynuffinfutsitch
ha, you dont need a choke
i run my old chevy in freezing weather (around 30 degree weather) and all i gotta do is let it warm up for 5 min, as long as it didnt get a big gulp of air (cause it would wanna sneeze) it would run fine i run a 190 degree thermostat
all i did is richen the jets up a hair in the cold
Match the carb to the application and problems go away.

Last edited by xntrik; 02-11-2007 at 02:21 PM.
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Old 02-11-2007, 02:12 PM
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Quote:
Originally Posted by mynuffinfutsitch
Dont go with a Demon
i had one and it was nothing but trouble, 500cfm vacuum sec
my boss where i work at said he tried running them on a racecar he built for a customer and he had nothing but problems with them, he said he swapped it out with a 750 holley double pumper and it fixed all his problems


the only thing about Demon carbs is that they are pretty, big whoop

That is illogical.

Blaming a company's entire line

because you had trouble once and your boss didn't know how to tune one.

Any ill matched carb/combo and any deficiency in tuning is not the fault of the manufacturer.

analogy=
Did you know that on the Firestone tire blow out deal, that the remaining 3 tires on each of the 49 fatal wrecks, the tires averaged 16 psi? Is that Firestone's fault that people run their tires flat? ..... What a country!!! What ever happened to personal responsibility?

Last edited by xntrik; 02-11-2007 at 02:19 PM.
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Old 02-11-2007, 04:20 PM
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alright, looks like i'll get the speed demon carb instead. i'm not paying $200 more for the mighty demon. $615 is kinda pricey for a carb.
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Old 02-11-2007, 04:32 PM
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By the way, the Firestone verdict for damages and recall was reached because Ford recommended "too low" of a pressure, Firestone knew it and did not refute it. The court was afraid that tires were damaged from running too low of pressure and wanted to prevent further injuries......

neither of which addressed the stupidity of the vehicles' owner's.......duh.

I just read the synopsis.

Liberals Against Common Sense. It should be a new organization. L.A.C.S.
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