High output alternator

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87e30
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High output alternator

Postby 87e30 » Mon Feb 22, 2016 3:40 pm

Any suggestions? From what I've been able to find out so far the 86 325e came with a 95amp alternator. All the replacements I can find are only 80amp. I have an alternator somewhere that came out of an old 735 because I read they are a direct swap, but put out like 140amps. Can anyone confirm that? Any aftermarket suggestions? I do plan on putting some music in the car eventually. Nothing crazy needing a 250amp alternator or anything, but definitely more draw than the stock "premium sound" system.
Schwarz 5-speed 87 325is (newest project)
Arktisblau 5-speed 86 325e (current DD)
Schwarz 5-speed 87 325e (parts car/LS1 swap?)
Gazellenbeige automatic 85 318i (70,000 miles)
Alpine white 5-speed 87 325is (my first e30, possibly for sale)
99 Suburban
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87e30
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Re: High output alternator

Postby 87e30 » Tue Feb 23, 2016 1:44 pm

Well I found out why my alternator wasn't charging (see pic). Battery light still stays on with key off, even with all fuses and relays out. It does turn off when I disconnect the battery. My SI lights do work.

So I took the voltage regulator out of the alternator from my 87 325e and now it's charging in the low 13's at idle. Still a little low, but MUCH better than before. I'm guessing that's not the original regulator because it's some no frills made in china crap. I'm gonna order a real Bosch regulator. I found a good price on one that says 80amp (part # 1197311008). I can't find specs on anything, but when I searched for the original part number from my car (1197311005) I saw the number 95 pop up a few places such as the eBay item description "VR-B195M VOLTAGE REGULATOR FOR BOSCH ALTERNATOR". Well it's supposed to be a 95amp alternator. Is there that much difference between the part ending in 008 that's compatible with a few hundred cars and the one ending in 005 that came out of my car?

Still open to suggestions for a higher output alternator, but at least if I'm charging for now it's not high priority.
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Schwarz 5-speed 87 325is (newest project)
Arktisblau 5-speed 86 325e (current DD)
Schwarz 5-speed 87 325e (parts car/LS1 swap?)
Gazellenbeige automatic 85 318i (70,000 miles)
Alpine white 5-speed 87 325is (my first e30, possibly for sale)
99 Suburban
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M20_fever
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Re: High output alternator

Postby M20_fever » Thu Feb 25, 2016 4:42 pm

Not sure on you're budget, but these are the alternators I've seen mentioned in comp stereo builds: http://www.iraggi-alternator.com/
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87e30
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Re: High output alternator

Postby 87e30 » Fri Feb 26, 2016 2:03 am

Yeah $600 on an alternator is more than 4 times more than I want to pay at the moment. I don't need 320 amps anyway. 140 should be more than enough for anything I'll ever do to that car. Now when I build the IS I may be interested in the extra power. I've read a lot of love AND hate toward iraggi's. Never had one, or known anyone first hand who had one, but online people either love them or hate them bad.
Schwarz 5-speed 87 325is (newest project)
Arktisblau 5-speed 86 325e (current DD)
Schwarz 5-speed 87 325e (parts car/LS1 swap?)
Gazellenbeige automatic 85 318i (70,000 miles)
Alpine white 5-speed 87 325is (my first e30, possibly for sale)
99 Suburban
User avatar
M20_fever
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Posts: 11026
Joined: Fri Feb 27, 2009 1:28 pm
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Location: Northern IL

Re: High output alternator

Postby M20_fever » Fri Feb 26, 2016 3:51 pm

It would take some fab work but you can get a Bosch AL7606N alternator from an 04-08 Ford 6.0 Diesel. They can be had for about $150 and puts out 135 amps. The one in my 7.3 superduty puts out 110 amps but is basically the same price, so the Bosch AL7606N is a common upgrade.
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Midwestern Councel C Prepared class champion 2012
North Suburban Sports Car Club C Prepared class champion 2012
HSAX Instructor

GET YOUR E3P GEAR HERE: http://www.cafepress.com/e3pgearshop

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