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 Post subject: How to swap a twincam alternator to a 90-93 ford festiva alt
PostPosted: Sun Aug 26, 2012 10:07 pm 
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Joined: Sun Aug 24, 2008 2:00 pm
Posts: 1134
Car(s): TX SR20DET, TX G200W, Dato 1200 Ute
Ok, first off, yeah I know ford!! But thanks to blackcoupe who managed to match this one up as a compatible alternator from UPI. I also tried Nissan N13, but found that did not fit!

This one is mando brand, and I can find alternators that look right on many late 80s, early 90s fords of all types, but have come to the conclusion that this one is from a 90-93 festiva. If anyone can confirm exactly what car this unit is from, let me know and i'll update this post. The plug is common, on many fords, nissans and mitsubishis. It shouldnt take much to find one at the wreckers.

So the plan is to replace the Denso with the Ford. The Ford alternator fits right on, so physical installation is straight forward although the rear mounting post does leave a little gap. This doesnt really matter as it bolts on solid and the belt lines up. Do this first.

Attachment:
denso 4 connection B E F N .jpg
denso 4 connection B E F N .jpg [ 176.97 KiB | Viewed 6158 times ]

Attachment:
gemi external reg to ford internal red mod2.jpg
gemi external reg to ford internal red mod2.jpg [ 331.25 KiB | Viewed 6158 times ]


The denso item is externally regulated by the nippon denso reg which for a TX is at the top of the firewall on the passenger side behind the water bottle and shielding.

We need to disconnect the external regulator, and bridge the L and S signals to the F and N wires to get them down to the alternator location.

Attachment:
regulator removal.jpg
regulator removal.jpg [ 272.79 KiB | Viewed 6158 times ]

Unplug this connector, and bridge L & N, then S & F. You can also remove the regulator.

At the alternator end, connect white/green to L and white/black to S.
Connect the original B+ pin to the new B+

This essentially covers this:
Attachment:
gemi external reg to ford internal red mod.jpg
gemi external reg to ford internal red mod.jpg [ 87.37 KiB | Viewed 6158 times ]


Now, reconnect your battery, and turn your key to on. The charge light should illuminate. Now crank the engine, the charge light should go out, and you should see good charge voltage at the battery.
Attachment:
good charge2.jpg
good charge2.jpg [ 174.08 KiB | Viewed 6158 times ]


If you see voltage like this all is well. :D


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 Post subject: Re: How to convert a twin cam denso alternator to a ford uni
PostPosted: Mon Aug 27, 2012 4:05 pm 
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Joined: Sun Aug 24, 2008 7:12 pm
Posts: 1938
Location: Windsor Gardens
Car(s): TX G180W+T, TE G180W, TG G180Z, Piazza 4ZC1T +more
Nice! What stopped the N13 item from fitting?

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 Post subject: Re: How to convert a twin cam denso alternator to a ford uni
PostPosted: Mon Aug 27, 2012 4:20 pm 
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Joined: Sun Aug 24, 2008 2:00 pm
Posts: 1134
Car(s): TX SR20DET, TX G200W, Dato 1200 Ute
the rear mount is too far back and collides with the rear mounting part on the engine. perhaps its a bracket that can be swapped with a g series SOHC part? I didnt need to look further, just fitted the one above and it was solved.

The g200w alternator mount sits outside of the mounting points, whereas I think the sohc ones are inside, so it becomes a problem here.

Heres a pic of the N13 LR170 and the original g200w denso.


Attachments:
n13 vs g200w denso.jpg
n13 vs g200w denso.jpg [ 150.93 KiB | Viewed 6138 times ]
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 Post subject: Re: How to swap a twin cam denso alternator to a ford unit
PostPosted: Tue Aug 28, 2012 10:37 am 
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Joined: Sun Aug 24, 2008 7:12 pm
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Location: Windsor Gardens
Car(s): TX G180W+T, TE G180W, TG G180Z, Piazza 4ZC1T +more
Ahh ok! Cheers! I'll have to look at the brackets if I ever get around to my twincams... As soon as this paint job is done.

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 Post subject: Re: How to swap a twin cam denso alternator to a ford unit
PostPosted: Tue Aug 28, 2012 6:37 pm 
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Car(s): TX SR20DET, TX G200W, Dato 1200 Ute
After looking at the above N13 LR170 a bit longer, I think a better description would be that the front mounting point is in the wrong spot. The pulleys look out by the difference at the back.

But I think i've found the matching part. The one pictured above is a mando brand, but I bet it is from a festiva as listed here:

http://www.ebay.com/itm/REMY-14437-Alte ... 0839990218

REMY 14437 Alternator

50 amps [Remy Reman ... 1993 Ford Festiva GL Hatchback 2-Door 1.3L 1295CC l4 GAS SOHC Naturally Aspirated
50 amps [Remy Reman ... 1993 Ford Festiva L Hatchback 2-Door 1.3L 1295CC l4 GAS SOHC Naturally Aspirated
50 amps [Remy Reman ... 1992 Ford Festiva GL Hatchback 2-Door 1.3L 1295CC l4 GAS SOHC Naturally Aspirated
50 amps [Remy Reman ... 1992 Ford Festiva L Hatchback 2-Door 1.3L 1295CC l4 GAS SOHC Naturally Aspirated
50 amps [Remy Reman ... 1991 Ford Festiva GL Hatchback 2-Door 1.3L 1295CC l4 GAS SOHC Naturally Aspirated
50 amps [Remy Reman ... 1991 Ford Festiva L Hatchback 2-Door 1.3L 1295CC l4 GAS SOHC Naturally Aspirated
50 amps [Remy Reman ... 1990 Ford Festiva GL Hatchback 2-Door 1.3L 1295CC l4 GAS SOHC Naturally Aspirated
50 amps [Remy Reman ... 1990 Ford Festiva L Hatchback 2-Door 1.3L 1295CC l4 GAS SOHC Naturally Aspirated
50 amps [Remy Reman ... 1990 Ford Festiva L Plus Hatchback 2-Door 1.3L 1295CC l4 GAS SOHC Naturally Aspirated
50 amps [Remy Reman ... 1990 Ford Festiva LX Hatchback 2-Door 1.3L 1295CC l4 GAS SOHC Naturally Aspirated

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 Post subject: Re: How to swap a twin cam denso alternator to a ford unit
PostPosted: Tue Aug 28, 2012 6:49 pm 
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Car(s): TX SR20DET, TX G200W, Dato 1200 Ute
and more pics of the item that ended up on the car. its a different brand, so you can see there are some differences, but I reckon its right. And it fits with ford. Maybe it is a 50 amp, which seems down a bit from the 70-80 I was expecting, but it does run the car with EFI, and H4 halogen lights on (though the H4s pull the volts down from 14.7 to 12.5 at idle, which is still charging enough.) And it looks like the Remy one is a rebadged mando as thats stamped in the casting anyway!

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mando2.jpg
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mando3.jpg
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mando1.jpg
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mando4.jpg
mando4.jpg [ 73.77 KiB | Viewed 6123 times ]


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 Post subject: Re: How to swap a twincam alternator to a 90-93 ford festiva
PostPosted: Thu Aug 30, 2012 2:18 pm 
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Joined: Sun Aug 24, 2008 2:00 pm
Posts: 1134
Car(s): TX SR20DET, TX G200W, Dato 1200 Ute
Here is a pic of the twincam alternator mount. The alternator mount points sit in front of these points, which is why the front pulsar alternator mount points are no good.


Attachments:
twincam alternator mount.jpg
twincam alternator mount.jpg [ 140.19 KiB | Viewed 6110 times ]
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