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Old 03-06-2008, 11:13 AM
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Choosing a new carb

I have a 357 cleveland with 2bbl heads. It came as a crate motor and it has a holley 600 and an edlebrock intake on the engine, which I intend on replacing. I have called and talked to both Demon and Holley technical support and the following are ccarbs they suggested based my engine and cam specs (card attached).

Holley:

770 cfm street avenger 0-80770 ($400.00 at JEGS or Summit)

Demon:

750 cfm mighty demon with annular boost 5402020GC ($550 at JEGS)

I look forward to your input cuz I am just not to sure which way to go. My application will be street with occassional track (drag).

Kinton
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Old 03-06-2008, 11:20 AM
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a lot of people overcarb their setup, and the thing is you really don't need to. sure you'll get like 5 extra hp, but you'll risk bogging in low RPMS. i've got a stroked out engine, oversize valves, and the works... i ran my motor setup on a dyno program and is said i was pulling only about 600CFMs at my 6000rpm redline. so a 650 carb would be sufficient. however i got a 750 holley for free... so i think i'll go with that. haha...but still... talk to someone on here and get the name of the dyno program...not desktop... because i forget it, i'm not home so i can't see it. but check it out and see your final CFM, decide from there.
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