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carb jets for singel weber, loud rear clunk from rear axle 140-160 1971

posted by  planetman on  Sun Nov 8 18:35 CST 2015
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last visit: Fri Oct 24 09:29 CST 2014
[RELATED]

Before you spend anything on the Weber, make sure the auxiliary venturi for the primary circuit is not loose.

The auxiliary venturi is made of harder aluminum than the throttle body and over time it wears on the throttle body. Fuel flows through the auxiliary venturi and when it is loose the fuel dribbles down the side of the throat of the carburetor instead of down the center.

Timing at idle is not as critical as knowing the total advance.

Your total advance should not exceed 38°.

FYI, 27° at idle is too high. It should be less than 18°
--
Eric
Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
Torrance, CA 90502






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