65-72 Distributor Vacuum Advance - 65 250 / 300 HP - 69-70 300 HP - 71-72 454

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The vacuum advance control unit on the distributor is intended to advance the ignition timing above and beyond the limits of the mechanical advance under light to medium throttle settings. When the load on the engine is light or moderate, the timing can be advanced to improve fuel ecomomy and
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272002
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Description
The vacuum advance control unit on the distributor is intended to advance the ignition timing above and beyond the limits of the mechanical advance under light to medium throttle settings. When the load on the engine is light or moderate, the timing can be advanced to improve fuel ecomomy and throttle response. Once the engine load increases, this "over-advance" condition must be eliminated to produce peak power and to eliminate the possibility of detonation ("engine knock").

Stampled B9
Specifications
GM Item No. 1115357
Base Unit of Measure EA
Net Weight 0.32
Special Order False
Car Years 1 1965 1966 1967 1968 1969 1970 1971 1972
Part # 272002
Search Description HORSEPOWER
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