11-10-2006, 09:54 AM
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Senior Club Cobra Member
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Join Date: Mar 2002
Location: God's country,
ME
Cobra Make, Engine: Original ERA 427sc, Powered by Gessford
Posts: 2,678
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Not Ranked
Quote:
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Originally Posted by scottj
Too large of a cfm rating, i.e. "over-carbing", will result in a small gain in top end at the expense of poor low speed throttle response- refering to engine speed. Over-carbing doesn't mean that the engine will run rich; it just means that overall drivability will be compromised. Rich/lean is a calibration issue. A carb of anysize, if improperly calibrated for the engine, could cause a rich (or lean) condition. A common mistake made is to install a large carb, calibrated for a racing engine, on a street/performance engine. A race-calibrated carb will run too rich at idle and low engine speeds on a mildly cammed engine.
Scott
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Assactly correct. You could wash the cylinders with a 600 cfm if it is not jetted properly.
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