Bosch Higher Output Alternators

[asifallasleep]

I'm looking to add a higher output alternator and found a company BNR which sells 85-95Amp rebuilt Bosch alternators with internal regulators that are direct fit into 2002's.

I was looking at the 318 alternator but if i can get the same amp output or more without the bracket mods it sounds like a no brainer.

Did Bosch make higher output alternators for the 2002? Or have these units been tweaked by BNR, increasing the output? Any concerns?

[florida2002m3]

I got a rebuilt higher output one, not sure if it was from the same guys.

No problems at all, quick change out and almost double the power.

[asifallasleep]

I installed the 85amp alternator and here are my volt readings:

Normal running no lights or radio on: 13.5 volts

Headlights on: 13.4 volts

Headlights and Fog Lights: 11.5 volts

No change with radio on

Fog Lights seem to require a lot of juice.

The removed alternator I believe was a 45amp. Was i mistaken thinking that a 40amp increase to and 85amp would sustain a reading of 13.5 volts with everything on including the fog lights and not the 11.5 reading i'm getting?

[Harv]

Were those readings at idle?

If so, sounds normal.

John

[florida2002m3]

Something funny i noticed with mine: it wont start to output until rpms hit 3k. Once it hts 3k once it outputs at all rpm's until the next time i stop/ start the engine.

It should not drop that much for longer than half a second untill the voltage regulater senses the voltage drop.

I would check the integrity of connections to alternatir, battery ect

[asifallasleep]

Were those readings at idle?

If so, sounds normal.

John

Those were the readings at idle and tooling around under 3K rpm's. I guess i expected a higher volt retention when the fog lights were turned on. I'm not seeing much of difference from with my removed alternator. The fog lights were the main reason i sought out a higher output alternator. I guess i need to have the output of the newly installed unit tested.

[bluedevils]

I'm looking to add a higher output alternator and found a company BNR which sells 85-95Amp rebuilt Bosch alternators with internal regulators that are direct fit into 2002's.

I was looking at the 318 alternator but if i can get the same amp output or more without the bracket mods it sounds like a no brainer.

Did Bosch make higher output alternators for the 2002? Or have these units been tweaked by BNR, increasing the output? Any concerns?

these are decent rebuilds with updated parts and internal regulators based on E30/5/6 series cores. However, they are not factory Bosch reman units. Will fit to 2002s with little work. If you search deep enough, there are real Bosch reman units at good prices on ebay, like this one:

http://www.ebay.com/itm/270660264055?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_1150wt_1076

The seller seems to be a good guy (no affiliation) and he might have other high output alt. Ask him. He also had Bosch M3 style (SR 44X variety) starters cheaper than dealers.