 Re: Erratic Tach
Does this only happen at idle or low RPM? probably alternator is not up to the load requirements. You can change the ratio of the alternator pulley but you have to careful to avoid overspeeding the alternator at high revs. You should have at least a 100 amp alternator with most of that available at idle(on a CAV) with the AC and all fans, fuel pump, lights etc running.
Dave
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SPF MKI #2214, 65 R model clone, 67 Al Craft Indy Car, 03 SL 500, 02 Lightning |