Denso 93 mm alternator installed

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fj20spl311
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Re: Denso 93 mm alternator installed

Post by fj20spl311 » Thu May 17, 2018 4:27 pm

its VERY small, so it can be installed on the drivers side, but the details have not been published. Its so small, the heat may not be an issue.
You can do it......
So you can keep you AC compressor?.....LOL
Phil
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Toptech360
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Re: Denso 93 mm alternator installed

Post by Toptech360 » Thu May 17, 2018 9:36 pm

ppeters914 wrote:
Thu May 17, 2018 3:13 pm
I believe the Denso and GM alt installs are similar. The GM alt upgrade is not limited to Datsuns. Google GM 3-wire alternator to find quite a few posts, pics, drawings, and YouTube videos. Here's mine (click image to get larger view).
  • Lester Part No. 7127-3, 63A
  • Terminal #2 Sensing (red wire) attached to insulated BAT post on alternator, same post that you connect another wire to POS (+) of battery.
  • Terminal #1 Field (black wire) not connected and taped off.
gm_alt1 (Medium).jpg

gm_alt2 (Medium).jpg
Your right the denso and Delco do wire up the same EXCEPT that you need to hook terminal 2 sensing wire to a key on 12v source other wise the the denso will think it's always "on" if hooked to a constant power and will cause a parasitic drain.
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Dan
1964 Datsun SPL310. The Datsun
1997 Toyota Tacoma LX 4wd. The Truck
2009 Subaru Forester XT.
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Linda
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Re: Denso 93 mm alternator installed

Post by Linda » Thu May 17, 2018 10:15 pm

Phil,
My alt is good and I have a spare, but having a brand new , not rebuilt alt that is cheap enough and I can put in the same spot is appealing. At least to put on my ToDo list :)
Linda
68 1600
Los Angeles, CA
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ppeters914
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Re: Denso 93 mm alternator installed

Post by ppeters914 » Fri May 18, 2018 1:39 pm

Linda wrote:
Thu May 17, 2018 3:36 pm
Could this alt be installed on the driver's side? I actually like the left side mount despite the heat.
Linda
The Datsun Roadster Book™, Part II, Pages 115-117 discusses the GM alt, including a pic of a GM alt installed on the driver's (left) side of the engine.
Pete
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greydog
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Re: Denso 93 mm alternator installed

Post by greydog » Fri May 18, 2018 6:47 pm

The Denso would fit easily and get more air flow. Might not cook over time.
Dan
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GoldHawg
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Re: Denso 93 mm alternator installed

Post by GoldHawg » Sat May 19, 2018 6:05 am

More alternator info than my mind can process, but very thorough can be found here:
http://www.pirate4x4.com/tech/billavista/Wiring/Part2/

JT68
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Re: Denso 93 mm alternator installed

Post by JT68 » Fri May 25, 2018 3:59 pm

Here is the entire Right-Hand Kit:

https://www.datsunrestorationproducts.c ... nt-for-u20

If you are good with electrical items you can be charging in 15 or 20 minutes total. Fully tested prior to shipping!
JT
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Re: Denso 93 mm alternator installed

Post by Toptech360 » Wed Aug 01, 2018 11:01 pm

We'll folks it's been a few months since I have installed the ebay Kubota/denso alternator. I wanted to update the thread a bit.

So far I have had zero issues. This is a slick setup and because of its small size it looks like the alternator belongs under the hood. I've driven the car a few times now along several long stretches topping out around 90mph at near 6000 engine crank rpm and the alternator doesn't seem to care about high rpm at all. Most of the time I cruise between 3200 to 4000rpm which is probably 8000 to 10,000+ alternator rpm and again, no problems or quirks to report.

That is all. Thank you
Dan
1964 Datsun SPL310. The Datsun
1997 Toyota Tacoma LX 4wd. The Truck
2009 Subaru Forester XT.
2017 Toyota AWD Swagger Wagon.