Only one vote per entry huh! Holley #3245, 585 cfm, easy decision, correct OEM carb for my 327/350 hp Nova engine.
Carb body, you can buy the whole carb with that set up. Carb spacers are more of a tuning tool for me, moves your power band around a little. A Friend used to swear by them and swap spacers to control his launch if he was blowing off the tires - I though it was BS but he had a system. Secondary linkage, looks nice, if someone takes the time to tune with it.
Choose a brand & model close to CFMs Pluse 30-50 Cfm bigger , ( Carb or Carbs) 1 Barrel 2b,3b 4b. Then Test , Tune. Keep notes . Adjust to Engine requirements & performance you are looking for, Sometimes the carb You pick is not the one you need , Then you need a smaller or bigger carb , VAC or DP . Carb Turning is more then mixture screws ,jets, power valve , metering rod. Those are basic I Prefer a carburetor's that is completely adjustable in all aspects. Over the Years I have accumulated over 30 carbs multiple mechanic injections For daily driven to Full out race
Changed two Holley vacuum secondary 750s and one 750 double pumper using the Proform centers, all ran quicker 1/4 mile with tuning. Also changed a Holley 850 to a 1050 using the aluminum Quick Fuel center, that one came out noticeably lighter but the old 850 ran a better 1/4 mile m.p.h.
@Jenkins Competition I couldn't vote because I run a Fish carburetor. I guess you're not familiar with some of the older performance carbs, eh?
Late at night, when the coyotes are up in my back yard, trying to catch cats, i watch the television. And one of my programs is the engine masters on motortrend. They did a test with an edelbrock, street demon, and the summit brand carb that Holley builds. That summit carb was by far the most affordable, and it blew the other 2 out of the water. Like 25hp iirc?
Single 625 Weber on a 900 or so 355 sbc... Crossbar plate with no nitrous "jets", the ported solenoids serve as the jets... All pretty much hidden under the air cleaner base... Grant
Depends on your intended use of that small block. I have ran anything from a small Holley or Edelbrock on a stock small block to (2) 660 double pumpers on a tunnel ram on a drag race only 358 inch . By the way you could drive that on the street with a .630 lift solid roller . I have won many features with a Qjet on a dirt car. Which when set up by someone who knows how makes the best street carb for a small block. The last small block Chevy I built for a customer used a Summit brand carb and ran perfect. I use an AED 820 cfm Holley double pumper on my 334 inch Ford motor and it is a bad ass carb.
The plenum divider has a small cut down area as it came to me. It looked original, as cast, so I didn't do any further cutting. The spacer I have is a 4 hole, not open plenum style. It serves to raise rpm peak HP, but also gets the carb bowls up away from intake manifold heat. Both good for my car.
Multiple carbs for looks hands down. A Q jet if you are cheap like me (and have one already), but with that said I have a Holley street avenger and love it a lot.
625 cfm vs barry grant 4 barrell.runs fine gotta put the choke back in.like to try the newish 425 square one (demon)
All 4 of my old cars have 2x4 setups, some have Carters, some have double pumpers and some have 4160 style Holley's, all 1-1 linkage. The small blocks 600 Carters 4160 Style 450 cfm Holley's Same kind of 450 cfm carbs on this one too
My Holley 600 cfm single inlet, vacuum secondary carbs have been amazing. I've had Edelbrocks and they're fine too, but I always seem to like the performance of the Holley better. I currently have those Holleys on my 383 Mopar, and my 324 Olds, both of which run a tad rich but very well. My 61 Olds is getting a dual quad SBC with 2 Edelbrock AVS2 series carbs, 500 cfm jetted for dual quads.
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