gruveb

Application will be an L69 street car.

Competition Cams XE-262H-10
Part Number 12-238-2
Intake Exhaust
Lift .462 .469
Duration 262 intake 270 Exhaust

Crane Roller Tip Rockers, SLP exhaust, Edelbrock Air-Gap RPM intake, Jacobs pro/street ignition, World Products 305 heads pocket ported....

I am looking at around a 650 cfm carb and am trying to decide between the following models:

Speed Demon GPT-1282010VE

Edelbrock EDL-1406 (only 600 cfm, but I already own this carb)

Holley HLY-0-80670 670 cfm Street Avenger

I've heard excellent praise on the Demon carbs, but they are more expensive. The price really isn't an issue. Not that I have deep pockets or anything, but this is a project that I am doing over time. So if it takes an extra 2 months to finish the project but I get what I want, who cares.

I am looking for a carb that provides the best power, but is realiable and hopefully easy to tune.


Any thoughts?

five7kid

iTrader: (14)

I'm sure you could make the Edelbrock you've already got work. Certainly the least expensive alternative.

I can't see spending the money they want for the Avenger Holleys. You can get a "normal" 4160, which is cheaper, and add the things the Avenger has (quick-replacement secondary springs, see-though float bowl plugs), plus convert it to 4150, for less money.

What I've been hearing and even seeing documented results with out-of-the-box Demons vs. tweaked-out Holleys makes me believe that is the way to go if you're going to spend the bucks for something new. For one thing, Demons are flow rated "wet", vs. dry for everybody else; and for another each one is calibration tested before being boxed. Wish I knew before I ordered the Holley what I know now.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4, 2300 stall TC. Ported World 305 heads, Crane PowerMax 2050 cam. ZZ3/4 intake, oil pump, pan & baffle. Accel HEI SuperCoil & module. Hooker 2055 headers, 3" Catco cat & 3" catback w/dual-opposite Flowmaster 80. 2.93 limited slip. Spohn SFCs waiting to be installed. AMSOIL syn lubes bumper-to-bumper. Daily year-round driver. Best ET, speed TBD...
57 Bel Air, my 1st car. '66 396, 9.7:1 forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 700 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).


[This message has been edited by five7kid (edited December 13, 2001).]

Phil87IROC

iTrader: (1)

I really like my new Holley 650 DP (4777). It really runs great compared to the Edelbrock 750 I had before, but I have a 383 motor and so it demands some more fuel, hence DP.

I'd go Holley 600 or 650 cfm vacuum secondary. I have had much better luck with Holley's Tech Support line than Edelbrocks as well. Call Holley at (270) 781-9741 and they will take your motor info and recommend one of their carbs for your application.....

Just my .02 cents worth.......

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Phil87IROC
Blue '87 IROC, 383 Crate Motor, KB pistons, AFR 190 heads, TPIS ZZ-9 cam, Edelbrock RPM intake, 1" TD spacer, Hooker SC/LT headers w/ Mufflex Y-pipe, Holley 650 cfm DP Carb (#4777), Stock T-5, GM 3.42 gears w/Auburn posi.
Ohio Valley Dragstrip (KY) Trophy Bracket WINNER - 8.39 ET on a 1.82 sec. - 60'. Best MPH = 84.44. Still Tuning Carb!
Red '89 IROC L98, TES w/FlowMaster, 4th gen 1LE DS, 700R4, T-Tops, K&Ns w/open air boxes, 160 T-stat, Hypertech Chip, gutted MAF & CAT, Hypertech 53kv coil, MSD wires.
http://www.geocities.com/cfrios/Phil87IROC.html

gruveb

One thing I do not like about the Edelbrock carb is that finding parts is not as easy. The other two have parts everywhere!

C h r i s

I would say you can probably tune your current carb. If not I like Holley/Demon. The only gripe I have about the Road Demon I have is that the idle is calibrated very rich - not right for a mild 350 like I have. To cure the rich idle I've reduced the size of the idle feed restrictions. Either way Holley or Demon you will have to tweak the carb to get it right - which can be annoying with a daily driver.

HTH,
Chris

onebad82z

iTrader: (7)

DEMON

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1982 Z28:355,4 Speed,Lots of bolt ons