Me again... Upgraded my stock 45A alt with a 90A alternator from a gasser. After upgrade battery light is on until 1100rpm. Battery voltage at the exciter wire. Did not have that problem with the old alt.
Getting 14.4/14.3 at idle without accessories, with fan lights etc 14.2/14.1.
Regulator is almost brand new swapped from my old alt, changed it recently. Bad diode bridge?
Bosch 90A alt, red label.