Im am in the middle of converting my 91z from a 305 tpi to a 350 carb. Ive seen hollys perform and I know they got a good rep, but Demons look intimidating. I dont know how much price differance there is or if its woth it though. Im planning on getting a 700-800 cfm w/mechanical secondaries.

 

Truthfully, I would skip both and go for either a Q-Jet or Edelbrock. The Holley is a pain in the *** to tune, and are built like zhit. The Q-Jet and edelebrock are a lot better choices for a street car, especially since they flow enough air for 500hp and give good economy.

If you have more power than that, you automatically get a dominator, no stopiing at Holley (or demon) and do not collect $200.

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Paul Huryk, billionare in training.
Monkey Guy Racing
Almost part of the moderately infamous NJ in-your-face all goomba crew

Do it right the first time.

Paul's home page

1985 IROC LG4 POS Best: 15.20s at 92.1mph
1984 Camaro 350 LG4 Best: 12.21s at 121.7mph

The smart person pays for something today so that more is received tomorrow.
The ignorant person gets something today and hopes to have enough money to pay for it tomorrow.

 

OR u can go with BG(Barry Grant)sort of a better version than holley. My friend has one and has no problems with his 350.

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92' camaro
New 305 block TPI conversion, Flat top pistons,Bore over .30 Forged parts all around,Edelbrock intake,ported plennum,ported corvette alluminum heads, accel cam,52mm throttle bodie, SLP runners Home aid cold air induction, Air foil,ford SVO 19lb injectors,fuel regulator,cloys timing chain, comp alluminum roller rocker arms and pushrods MSD 8.5 mm wires, bosch plattinum plugs, hypertech cap & rotor and coil, Edelbrock TES headers, free flowing catalytic converter and a 3 inch force II flowmaster exhaust system, and a 3 inch cutout,Zoom multi friction clutch, T-5 tranny,billenstien shocks&struts.
Soon to come!!!
Procharger system 12lbs o boost.
New paint job(hawaiin orchid purple)Cast alluminum ZR1 rims w/ 275 tires.
Favorite quote: "where ever u go, there u are"

Other car;
1971 plymouth Duster
Mods:340,edelbrock victor jr. intake, 650 4 barrel holley, heddman headers,40 series dual flowmasters, cold air intake,4:10 gears, just got a new paint job and cragar rims with 315 tires in the back.
:Yeah its not a chevy but damn how many 71' dusters have u seen in the streets.

 

Barry Grant is basically a Demon carb

Go Demon, you won't be disappointed ... it has all the advantages of both holley and edelbrock... and if you pay the extra cash for the RS version, you get the removable venturi sleeves... not a bad deal at all... and worth the money if you like to play a lot

 

I just ordered the 625 cfm Road Demon to replace my 750 holley that isn't performing like I want. I'll let ya know how the Demon runs if there's a difference. Looks to me like a better setup all the way around. 4 corner idle, clear sight plugs, ported inlets, and the choke tower is a good half inch at least shorter than a standard holley one (good for using w/ a drop base aircleaner like I have to use, allows for extra area for air to make the turn down).

Got it for $299 from Jegs, Summit is backordered for a couple weeks they said...

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Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray

 

I've had two Speed Demon 750 carbs and they both had metal shards in them from manufacturing. They never worked right. I know three people with the same exact problem and they sent them back. We'll never buy one again.

 

the new holley street avengers are pretty trick and user friendly, you might want to check those out