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  #16 (permalink)  
Old 01-01-2004, 03:37 AM
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my 305 has a stock short block with an edelbrock performer EPS dual plane intake, wolverine blue racer cam, valve lift .443/465, cam lift .295/.310, .050 dur. 214/224, adv dur. 280/290, gear drive, stock hei with 8mm wires, long tube 4 to 1 headers with 1 5/8" primaries to a 2.5" exhaust with flow master 40 series original flows and right now an aluminum 600cfm holly marine carb. i have chosen the edelbrock because they r a good name, a lil less expensive than a holley street avenger and because it matches my intake manifold.

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  #17 (permalink)  
Old 01-01-2004, 09:09 AM
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406SS, the first 570 Holley I had was on my 76 C-10s 305 that I built. it was 9.5:1, Edelbrock Performer cam & Intake, stock 305 heads that I ported.
The second one was 10:1 compression, has a compCams 256XE cam, L-98 Corvette aluminum heads 1.94/ 1.5 valves& Performer intake. this one ran 13.80s in my 86 EL Camino with 3.08s.
in both cases I jetted them up.. in both cases I also had Edelbrock 600s on em also, & played with metering rods, jets & springs, as well as accelerator pump adjustment.the 570Holley always prevailed.
On my current toy,a 75 GMC C-15 with a factory 454, it had a 750 Edelbrock on it when I bought it, it didnt run real well,even after a tune up I decided to either replace the carb or rebuild it.I decided to go ahead & rebuild it for the money, might be worth a try.
After tweakin on it for a week, I went & bought a 770Holley, havent touched it....at all....since I put it on 3 monthes ago.
Ive always prefered carters /Edelbrocks on the street in the past, but for some reason, its all flipped now...Qjets & Holleys for me. John
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Old 01-01-2004, 09:47 AM
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Heres a new one to look at,GPT-6282010VE Barry Grant Road Demon,its vacuum secondaries,625 cfm,electric choke,square bore,looks good,and is well made,its under $300 and would work perfect with your setup. Its basically an improved upon holly,Summit racing sells em for $289.95
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Old 01-01-2004, 11:21 PM
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wow, thanks for the input guys, im deffinately gonna look into that Barry Grant Road Demon and im gonna consider the 570 holly again. im just looking for the best bang for my buck.
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Old 01-02-2004, 12:35 AM
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i couldn't find the GPT-6282010VE only the road demon GPT-4282010VE. ok i have done some more looking around and i have the carb im intrested in. they r more money than what i expected to pay (except for the edelbrock) but it would probably be worth it in the long run.


Edelbrock EDL-1406 Electric choke, 600 cfm, Performer Series carburetor. $259.95 at summit. i just realized this carb doesn't have vacuum secondaries so now im not to sure about getting it.

Holley HLY-0-80570 570 cfm, vacuum secondary, dual feed, electric choke, square bore, Street Avenger carburetor. $359.95 at summit.

Demon GPT-4282010VE 625 cfm, vacuum secondaries, electric choke, Road Demon series, carburetor. $339.95 at summit.

Demon GPT-1282010VE 650 cfm, vacuum secondary, electric choke, Speed Demon series carburetor. $399.00 at summit. i know the cfm is a lil high.

i also found Part # 1282020V E 575cfm Vacuum-Secondary Speed Demon which isnt listed at summit and probly would be better for me than the 650cfm.


what do ya think? its basically a battle between demon and holly. and this being my first carb, other than my marine holley, i have no idea which would be better for my application.

what would be the difference between buying a 600cfm edelbrock over a 600cfm carter? the carter is cheaper in price.

Last edited by Super Chevy; 01-02-2004 at 01:29 AM.
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Old 01-02-2004, 12:44 AM
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Q-jet!

What else did you think I was going to say,
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Old 01-02-2004, 12:56 AM
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Quote:
Originally posted by Super Chevy
i couldn't find the GPT-6282010VE.
HERES A LINK FOR THE ROAD DEMON JR. CARBS http://store.summitracing.com/defaul...d=18&x=25&y=10
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Old 01-02-2004, 01:20 AM
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this is the closest i could find, GPT-6282010VF 625 cfm, with Ford kickdown linkage, vacuum secondary, chokeless, Road Demon Jr., 4 barrel carburetor Today $280.95, but it say its chokeless.

Last edited by Super Chevy; 01-02-2004 at 01:26 AM.
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Old 01-02-2004, 01:24 AM
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if its a stock engine or even a mild engine stay away from demons. they will drown you, Holley is by far the best general performance carb out there. demons are just supped up holleys and they do have their advantages but for a 305 you will just be able to chug around. Im running a 650 speed demon vs on my 355 and i had to jet it down about 4 times to get it even close to decent. my holley is a 750 vs and its on my 429. I say any one who doesn't like holleys cant tune their carb. If you can tune the thing right you will get a much better suited carb for your exact engine. why settle for a generic carb that bolts on and goes when you can custom tune yours for your vehicle. all it takes is jetting, settling floats and maybe setting the acc. pump. for your engine id say a 600 holley or a 600 edelbrock. or a rebuilt q jet dont diss the q jet they are nice carbs and on a 305 they are perfect.try to get center hung floats and duel fuel inlets on the holley if you can find one and its nice to get one with duel metering blocks.
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Old 01-02-2004, 01:37 AM
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can u get the 600cfm edelbrock with vacuum secondaries? if i go with a holly it would be the 570cfm street avenger. i have read good things about the street avenger series. i dont wanna go with a q-jet because i have the square bore intake.

and i have read about the demons and they seem very well build.
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Old 01-02-2004, 01:37 AM
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Demon all the way
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Old 01-02-2004, 01:44 AM
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oh no, now i ve got someone who likes demons, this is gonna be such a hard decision.
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Old 01-02-2004, 01:52 AM
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Like others have said, a Demon is nothing but an improved Holley. I own a Barry Grant Silver Claw and I must say that it is the best carb I have ever owned. The only thing you have to consider with the cost of these carbs is the hidden expense for the fuel line. I paid $90 bucks for the one on mine. If you count that I'm sure the Edelbrock will be a lot cheaper.
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  #29 (permalink)  
Old 01-02-2004, 02:05 AM
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ya the edelbrock would be way cheaper. thanks for mentioning the fuel line, i never considered it.
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Old 01-02-2004, 09:34 AM
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Hold on,summit threw February page 26 single fuel inlet,nothing hidden,just put one on a 79 El Camino with headers and a performer manifold,thats all. It didn't even need jetted.You owe it to yourself to look at the quality of this unit,I personally don't think its possible to find a better carb for your buck.Barry Grant got his reputation reworking Holley's,he knows carbs,he took away the things he thought were inferior and now sells these.There is no one size fits all carb from anyone.

By the way,I don't think the eps is a spread bore manifold,and I wouldn't put an adapter on if it were me. Qjets and such may not work well for you.

They also have a GPT-6282020VE 525 cfm road demon that would run real well and have killer response but I think would fall short of your expectations up top.

Decisions,decisions,I don't think the carters-edelbrocks are bad either,or Holley's,the main thing is don't make the most common mistake and oversize,your better off being to small than having something that loads up,eats gas,and cant be tuned.

Last edited by rifraf; 01-02-2004 at 09:34 AM.
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