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bureau13
Joined: 07 Sep 2017
Posts: 480
Location: South Florida
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 Posted: Mon Feb 28, 2022 3:03 pm Post subject: Alternator options |
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I think my alternator is not putting out enough to keep my battery charged.
First of all, it's not clear to me if I have a 90A or 75A alternator. Were there 90A alternators stock?
FCP has a few choices...a Valeo/Paris Rhone is like $300, or a pair of Bosch's that are quite a bit less: The cheaper of the two is 068903017EX, at like $115. Or, for $150, plus a stiffer core charge, the AL115X. There is no obvious reason why one should be better/worse than the others, and all are listed as 90A.
Given that FCP is claiming they all fit, and all put out 90A, I see no reason not to pick the cheapest, it's a Bosch just like the middle one, unless someone on here has knowledge of this model that says otherwise. If you do, please let me know!
_________________
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1982 931
1986.5 Silver 928S
2007 Hummer H3 (Daily Driver)
Past lives (I miss them all):
2004 RX-8 (Wrecked)
1993 RX-7 (Sold)
1987 RX-7 Turbo II (Sold)
1985 RX-7 GSL (Stolen) |
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chuck21401
Joined: 20 Feb 2005
Posts: 532
Location: Annapolis, MD
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| Posted: Mon Feb 28, 2022 11:48 pm Post subject: Re: Alternator options |
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| bureau13 wrote: | I think my alternator is not putting out enough to keep my battery charged.
First of all, it's not clear to me if I have a 90A or 75A alternator. Were there 90A alternators stock?
FCP has a few choices...a Valeo/Paris Rhone is like $300, or a pair of Bosch's that are quite a bit less: The cheaper of the two is 068903017EX, at like $115. Or, for $150, plus a stiffer core charge, the AL115X. There is no obvious reason why one should be better/worse than the others, and all are listed as 90A.
Given that FCP is claiming they all fit, and all put out 90A, I see no reason not to pick the cheapest, it's a Bosch just like the middle one, unless someone on here has knowledge of this model that says otherwise. If you do, please let me know! |
I ended up with the AL115X from FCP:
http://www.924board.org/viewtopic.php?t=45275&highlight=al115x&sid=cfe43da969bea316c52c3fbd99e9571f
I found inconsistencies with part numbers and ratings.
Here's the link to the 068903017EX
https://www.fcpeuro.com/products/audi-porsche-volkswagen-alternator-100-series-4000-5000-coupe-quattro-924-928-quantum-al109x
If you search the MFG Number listed: AL109X you'll see results indicating that one is the 75A model.
Interestingly, the AL115X lists the same OE number (068903017EX ) on this page:
https://www.fcpeuro.com/products/audi-porsche-volkswagen-alternator-4000-quattro-4000-5000-coupe-quattro-924-928-quantum-al115x
But if you search the MFG number AL115X you'll see results indicating that this is the 90A model on other retailer websites.
I also searched the SKU numbers and the other MFG numbers listed with mixed results, but I couldn't find anything to indicate that BOSCH SKU
BOS-0986030547 was the 90A model.
The AL115X is more expensive and the core charge is more. From what I found, this one is the 90A model, I had doubts about the other one listed by FCP. They do have a good return policy.
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1981 Porsche 931 w/S1 engine & g31 transmission. Water-cooled intercooler |
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bureau13
Joined: 07 Sep 2017
Posts: 480
Location: South Florida
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| Posted: Tue Mar 01, 2022 1:56 pm Post subject: |
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I suspect you're right, and I should get the AL115x. I also found the other number at another vendor attached to an AL24x which shows as not fitting at all. So confusing. Since you have knowledge of the AL115x fitting and working I'm going with that one.
Is there anything special needed to get the pulley and fan off (and back on)? I ask because the alternator page on FCP showed a number of alternator pulley "decoupler" kits. I hate it when I order a part and then it turns out I need something else to actually put it on the car and use it...
_________________
-----------------------------------------
1982 931
1986.5 Silver 928S
2007 Hummer H3 (Daily Driver)
Past lives (I miss them all):
2004 RX-8 (Wrecked)
1993 RX-7 (Sold)
1987 RX-7 Turbo II (Sold)
1985 RX-7 GSL (Stolen) |
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chuck21401
Joined: 20 Feb 2005
Posts: 532
Location: Annapolis, MD
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| Posted: Tue Mar 01, 2022 2:39 pm Post subject: |
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| bureau13 wrote: | I suspect you're right, and I should get the AL115x. I also found the other number at another vendor attached to an AL24x which shows as not fitting at all. So confusing. Since you have knowledge of the AL115x fitting and working I'm going with that one.
Is there anything special needed to get the pulley and fan off (and back on)? I ask because the alternator page on FCP showed a number of alternator pulley "decoupler" kits. I hate it when I order a part and then it turns out I need something else to actually put it on the car and use it... |
Everything was straightforward. I used an impact wrench to “lightly break the nut loose” is the best way I can describe it. Installation is the reverse of removal.
_________________
1981 Porsche 931 w/S1 engine & g31 transmission. Water-cooled intercooler |
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bureau13
Joined: 07 Sep 2017
Posts: 480
Location: South Florida
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| Posted: Tue Mar 01, 2022 3:16 pm Post subject: |
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OK thanks. Sounds manageable!
_________________
-----------------------------------------
1982 931
1986.5 Silver 928S
2007 Hummer H3 (Daily Driver)
Past lives (I miss them all):
2004 RX-8 (Wrecked)
1993 RX-7 (Sold)
1987 RX-7 Turbo II (Sold)
1985 RX-7 GSL (Stolen) |
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bureau13
Joined: 07 Sep 2017
Posts: 480
Location: South Florida
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| Posted: Thu Mar 10, 2022 3:52 pm Post subject: |
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Alternator received, installed, everything was pretty straightforward. I did noticed that the plastic shield thing around the positive harness connection (it's a flat triangular piece) had a corner broken off and sitting in the box. I was able to install the harness without any danger of it shorting to the case, which is why I presume that piece is there, so I didn't send it back. Also, my existing alternator had no such piece, so I guess what I do have there is a bonus, lol.
_________________
-----------------------------------------
1982 931
1986.5 Silver 928S
2007 Hummer H3 (Daily Driver)
Past lives (I miss them all):
2004 RX-8 (Wrecked)
1993 RX-7 (Sold)
1987 RX-7 Turbo II (Sold)
1985 RX-7 GSL (Stolen) |
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