[Malcolm]

Thanks for the input. When I spec'ed the alternator, I did so wanting a distinct voltage output as mentioned to deal with my red top battery. Racemettle who made the alternaor for me set the regulator at 15v knowing that in practical terms this would drop to 14.5v when the car was running. It does precisely that.

I had asked for 120 amps but due to size restrictions and connection positions the 120 amp alternator they made initially did not fit and could not be made to fit so back it went. The one now on the car is beleived to be 90 amp and has all terminals on the side instead of on the rear face of the alternator. I think it is also lighter than my last alternator but that was not measured. I have run the car (until my fuel leak!) and had the wipers, headlights and fans all on at once and it all ran just fine. That is about the max amp load my car can produce as I don't have a Ross Nicol sound system! :-)