Hey,

I'm bulding a 383 stroker, street engine that doesn't have to pass emissions......only one real question on my mind. Which carb should i go with, I know I'll need a 750cfm one for sure but should i go with an Edelbrock, Holley, Demon, or Q-Jet. I've heard good and bad things about all of them but I'd like some input from you guys if you have any to give me. Plus which would give me the best performance or gas milage (not a major concern, just wondering) My set up is listed below.


-Scat 3.75 Crank
-Forged Rods 5.7in w/ARP rod bolts
-Forged Pistons (9.75:1 CR) w/ moly rings
-World Sportsman II heads,64cc, 2.02/1.60, 3 angle valve job
-Cam with 236/242 duration at .05 inches
-1.6:1 rockers
-Edlebrock Performer RPM intake

 

HOLLEY, or Demon if you can afford it.

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"American made baby. 100% American iron. The muscle among the masses. My hero. Yep, you can take your ergonomically designed, space age, computer controlled, 4 door, cup holding map lighted split double wishbone split fold down retractable cargo covered moon roof piece of transportation and keep it. For I have felt the thunder. And I know the difference!"
JSP Motorsports
ICON Motorsports

 

Get the Holley 4779C carb. It has manual choke,mechanical secondaries and are pretty easy to tune.

For all out power, Demon.

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350 4 bolt main, Speed-O-Motive 383 stroker kit, re-sized rods ground for clearance,TRW Forged pistons,10.7:1 compression,HPC Coated RPM intake, Speed Demon 750 cfm carb,World Products Sportsman II heads,2.02/1.60 valves, Comp Cam 1.6 roller rockers, Comp Xtreme 284 cam,240/246@.050 with .540 lift,Crane pushrods,ATI damper,Proform HEI and MSD6A box,HPC coated 1 5/8 headers, 2.5" exhaust with 40 series mufflers,TH350 with Hughes 3000 stall, Powertrax NoSlip Locker, 4.11 gears.

 

Since you mentioned mileage, q-jet wins there. Your RPM manifold would have to be the q-jet type. If you're willing to spend the $'s for new, the Edelbrock 1904 or 1906 (795 cfm) would work nicely, but the 1910 Performer RPM q-jet flows 850 cfm. All have electric choke. You'd have to tune, but that would be the case with any carb you mentioned. Remember, the q-jet was originally designed for the driveability/economy/performance compromise.

The used route would save money, but increase the potential for headaches.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" Hedders, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere w/open diff & slipping tranny. Daily driver while Camaro was being put together.

 

Holley or Qjet! I would recomend the street avenger holley or the qjets rebuilt by edelbrock. But never a standard performer "carter afb" unless you dont know how to tune a carb

 

I vote Holley. That is what I have on my recently built 383. I have had zero problems with it.

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Big 454 72 Chevy Nova
383 86 Camaro Z28
10.5:1compression 186 casting Heads,234dur.488lift exh&int,Edelbrock performer intake, Holley750 vac.sec 400 crank,flat top pistons,edelbrock valve springs and lifters,tranny shift kit,2500 stall converter. Will install 3.73's later on and might go with a more aggresive cam.As of 4/01 added Hooker Headers,2.5inchpipes with 40 s. Flowmasters.Ignition upgrade include: MSD Coil and MSD module.

 

Oh and performance is great to.

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Big 454 72 Chevy Nova
383 86 Camaro Z28
10.5:1compression 186 casting Heads,234dur.488lift exh&int,Edelbrock performer intake, Holley750 vac.sec 400 crank,flat top pistons,edelbrock valve springs and lifters,tranny shift kit,2500 stall converter. Will install 3.73's later on and might go with a more aggresive cam.As of 4/01 added Hooker Headers,2.5inchpipes with 40 s. Flowmasters.Ignition upgrade include: MSD Coil and MSD module.

 

HOLLEY HOLLEY HOLLEY
edelbrock carbs dont perform. demon is the sh*t, but too pricey for my poor *ss, so i havent actually used one and i cant say anything from experience. quadrajets make nice paperweights when properly cleaned

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85 IROC 350 11:1keith blacks,.555lift erson roller cam,1.5 crane roller rockers,edelbrock intake,holley 4150 750dbl pumper, nitrous oxide,full length heddman headers,true dual exhaust, 11"stall converter, 700R4, 3.73 locker

 

An Edlebrock #1407 or #1412 would work well on your 383.




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*I do custom performance mods on Edlebrock Performer carburetors (dualplane intake mods in the works),
White 1986 Irocz, 305 with iron #416 heads,
383 with aluminum TFS heads,
Edlebrock Performer-RPM intake and Performer #1407 carburetor, +110hp shot of crack, 700R-4 tranny, Vigilante 2400 lockup converter, 3.25:1 Ford 9" rear, Mcreary Road-Stars, SLP-stainless 1.75" shortie headers & Y-pipe, single 3" Borla exhaust, Linginfelter-TPI camshaft part number 74216 pulls 17" vacuum solid. Cam specs 213/219 @.050 114-LSA, sometimes advertised at 216/219 @.050 112-LSA .462/.470 lift @1.5:1 ratio. Using Harland Sharp 1.65:1 roller rockers. MSD-6AL, billet distributor, multi-retard, blaster-3 coil, and RPM switch. SouthSide machine subframe connectors, SSM lift-bars, Moroso 4" underdrive crank pulley.

N/A runs 10.9 @124,
Crack-runs 10.3 @135
haven't run at track since Oct-99
* vizit miy homepayge * http://www.geocities.com/trailerparkpage/

 

I'm about to put a holley #1850 600 c.f.m. on my ride. I havent had anything but a Qjet on there, so I'm excited to finally be getting a real carburetor on my engine, that computer control bullsh*t has got to go. I've also heard really positive stuff about the Street Demon series, if you've got almost $400 bucks burning a hole in your pocket.

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---Grady---
1984 Berlinetta.
LG4 305, 150 hp.
Rochester Quadrajet(Comp. Controlled)
TH-700R4.
Flowmaster 80 series/ 3" cat-back pipe.
Accel Superstock Coil.
7.5 10-bolt rear/ 3.08's.
Edelbrock signature series air cleaner -w- K&N Filtercharger.
Pioneer head unit, Pioneer front 4X6's, Cerwin Vega rear 6x9's.
Daily Driver.

Personal Quote: "The Rice-Boys all tremble with fear when the old American V8 draws near."

 

My 625 cfm Road Demon just arrived in the mail today. I have to say it looks like a freakin sweet carb. I'll let everyone know how I like after I install it tomorrow evening...

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

 

its obvious I'd vote for a Demon as well (no not because of my name hehe)... sure they're pricey, but they're worth every bit of it...

Just as long as you keep yourself sane with it... $400 for the 750cfm Demon's isn't a bad price at all, considering the quality and the performance of them...

But go with what you can afford... or get a used one as a temporary solution till you can afford a Demon

 

i guess i could have been more specific. NEW carbs are too expensive for my poor *ss. nobody is selling used demon carbs yet. i buy used holleys and rebuild them

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85 IROC 350 11:1keith blacks,.555lift erson roller cam,1.5 crane roller rockers,edelbrock intake,holley 4150 750dbl pumper, nitrous oxide,full length heddman headers,true dual exhaust, 11"stall converter, 700R4, 3.73 locker