Converting an alternator to delta config. ?

[marin]

I've been reading up on converting a spare alternator I have here (it is a Bosch BXU1285 with a 9 190 067 019 regulator) to delta configuration for the extra amps I can gain when using it as a second alternator. I have pulled it apart and it seems like a very simple procedure that I am capable of. I have found that from an 85 amp alternator, I can make 147amps.

Couple of questions though.

1. How do I calculate how many amps it will make at what revs going off the original output curve (which I have found in the catalogue)?

2. How badly does delta affect the curve given I have been reading that it won't make many amps at low revs?

3. Can the regulator / alternator in general handle this?

4. Can the Bosch range of alternator handle this change as I am also getting my hands on a VS Commodore V6 alternator, and possibly an EA Falcon 120 amp alternator that I could consider converting to Delta instead (120 amps in star/wyte, 204 amps as delta!!!)

5. Have I forgotten anything else?

My issue currently (lol) is that my 70 amp alternator with vacuum pump on it that is only about 6 months old is only just keeping up (at night with roof lights and headlights going, it doesn't keep up) so I see the cheapest way to fix this is to play with another alternator. I could simply bolt it on, but more amps for the same effort would be nice.

[bansheebuzz]

1. you cannot calculate it, it would have to be tested

2. it will dramatically reduce the low speed current, changing the pulley to increase speed is not advisable either as rotor speed my be too high when reving the engine high

3. the regulator can but the rectifier wont.

4. vs alternator is 90amp and ea is 85

[chimpboy]

I don't know anything about the delta config, but for robustness and ease of installation I would just bolt the second alternator in.