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Old 07-09-2011, 07:24 PM
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bucking at low rpm's

Still trying to get the bugs out of the new motor i put in my old 83' camaro.It's a freshly built 350 bored 30 over with an xe-274 cam ,edelbrock rpm dome,pertronic flame thrower dizzy,msd 6AL2 box,edelbrock 1411 750 carb,041 64cc camel hump heads,small dome pistons,crane roller rockers and has 3.42 gears with an open diff.The compression ratio is suppose to be 10.8-1.The problem I'm having is low rpm bucking or jerking and sort of a flat spot before hitting higher rpm,then it works great but driving through town at low rpm sucks.I'm currently using ported vacuum and timing is set to 16 deg.I have to use octane booster with this setup.If any of you pro's can help me with this I would be gratefull,oh and its a street only car.. Thanks ...

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Old 07-09-2011, 07:55 PM
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Try backing off the timing several degrees and giving it a test drive. Kinda sounds like it may have too much initial advance trying to force the piston back down the bore before it gets to the top. Your timing marks might be off. Can't hurt to give it a quick try.
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Old 07-09-2011, 08:14 PM
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If retarding the ignition timing does not help, you might have a lean spot that requires a slightly richer mixture.
Lean misfiring can cause bucking at light throttle.
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