I was looking at the different caarbs out there and there are 600CFM and 750 CFM, I know what they all men but if you only needed 600CFM carb and you used a 750 would it be too much? In so much that you would actually lose power? Or would proper tuning just give you a wider birth of things you could do with it?

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1 5/8 Hooker Competetion Headers, custom y-pipe,no cat, Flowmaster,Edelbrock open filliment filter ,K&N ,
160 stat, BF G-Force w-rated tires

 

It's all relative to what you are putting under that carb. A wimpy 305 or a fire breathin' 350 or 383. The smaller carb will always have better throttle response, and the bigger one will usually make a little more peak horsepower. If I was going to go out and buy a carb for a motor I planned to build up as I could afford it. I would by the 750. If it has some kind of auto/secondary action it will not be too big 'cause it will size it self to the motor. Check out the Holley #3310 750 Vac sec, the edelbrock performer #1407 even a rebuilt Q-jet will work well. the early ones (pre '74 were 750 cfm. Later ones M4M type are 795 cfm. I think the Edelbrock performer is probibily the easiest to work on and most trouble free. They are a very smooth carb out of the box, and can be tweeked to a sharp tune with edelbrock parts.

 

Yep, a 750 cfm Holley would be a good choice. I've had it on my 305 back when it wasn't a 383 and it worked well with a little bit of tuning. Now if I had no plans for the 305 I would have gone with a smaller cfm carb.

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383 86 Camaro Z28 ---1/4 mile e.t>12.89@108.8mph,,
10.5:1compression Dart Pro 1 Aluminum heads 215cc>2.05/1.60 valves,400 steel crank,cam specs:224/234 at 050 525/525 lift,3500 stall converter,shift kit,4.10 gears,770 Holley Avenger,Victor Jr. Intake,true dual exh,Hooker headers with 40 series Flowmasters,MSD Coil and Module.ALSO SECOND GEN Z28---mods:454 BBC,.546 max lift(doug herbert cam ) 750 Holley vac sec. ,Edelbrock Performer manifold,Holley electric fuel pump,Hooker headers,Flowmaster mufflers,beefed up 700r4 tranny, 3.90 gears, powertrax unit, B&M console shifter.

 

It depends on the whole car. If you have high gears(2.73 or something), a stock 305, and a 750 holley squarebore--off the line acceleration will probably suffer compared to a 600 holley, without any upper rpm gain. With a spreadbore(like a q-jet) off the line acceration will be fine with a 750--smaller primaries.


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350 with stealth intake, holley carb, 470 lift cam. 700r4 with .5 boost valve, vette servo, tci lock-up kit, B&M megashifter. Richmond 3.73 gears, powertrax locker, timkin bearings, synthetic lube. Custom 3 inch single into 2 2.5 pipes. 1 1/2 drop springs, 1 5/16 solid front sway bar, 1 inch rear bar, custom subframe connectors, custom LCA relocation brackets. Kobel ground FX, currant red metallic paint. Lots of other stuff...
82camaro