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SU Carburators

posted by  Volvo From Heck on  Mon Feb 1 18:40 CST 2021
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last visit: Mon Oct 13 20:56 CST 2014
[RELATED]

If you remove a metering needle you should see a code stamped into the stem. On 122S models of that vintage I've always found ZH needles - rather lean, especially when compared to the later '67 & '68 B18 with a higher compression ratio and split exhaust manifold. Years ago I came across a soft cover reference booklet with all the SU needles listed, measured every 1/8 inch - about a zillion needles (maybe a little bit of exaggeration). -- Dave






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