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Author: Subject: Duratec alternator
andyhaase1

posted on 8/6/18 at 06:58 PM Reply With Quote
Duratec alternator

Has anyone had issues with the standard duratec alternator charging the battery?
The guy doing my electrics said thereís only one wire coming out thatís required (the others are used in the standard ecu so are not required when using an aftermarket ecu. He said it may not charge the battery with using an exciter?wire.
Andy

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starterman

posted on 8/6/18 at 07:06 PM Reply With Quote
Do you have a part number from the alternator by any chance ?

Cheers
Mike

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andyhaase1

posted on 8/6/18 at 07:36 PM Reply With Quote
Hi, I just managed to find a pic but dunno how to post pics on here. Hereís the details on the side of the alternator.
VISTEON
MIC 3.1
5S6Y-AB
05 02 10 (Presune thatís a date)
14:45:34 (?)

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starterman

posted on 8/6/18 at 07:39 PM Reply With Quote
quote:
Originally posted by andyhaase1
Hi, I just managed to find a pic but dunno how to post pics on here. Hereís the details on the side of the alternator.
VISTEON
MIC 3.1
5S6Y-AB
05 02 10 (Presune thatís a date)
14:45:34 (?)


5S6Y-AB Part Number

14:45:34 Time

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starterman

posted on 8/6/18 at 07:43 PM Reply With Quote
That is a smart charge alternator. You need more than one wire to run it. Not to sure about your electrician.
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starterman

posted on 8/6/18 at 07:44 PM Reply With Quote
My advice is change it for a smaller, lighter easy to wire unit.
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andyhaase1

posted on 8/6/18 at 07:47 PM Reply With Quote
Ok, thanks for the info.
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andyhaase1

posted on 8/6/18 at 07:48 PM Reply With Quote
Do you have a suggested alternator I should be looking for?
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starterman

posted on 8/6/18 at 07:50 PM Reply With Quote
Why not a small 40 amp Denso unit? That is more than enough output for any kit car or race car.
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big_wasa

posted on 8/6/18 at 07:54 PM Reply With Quote
There is no excite wire. Itís fully controlled by the ecu. The ecu puts the light out on the dash. If you unplug it, it will self excite and charge.

As above itís fords smart charge system. Ford specify a silver calcium battery to with stand higher charging voltages.

[Edited on 8/6/18 by big_wasa]

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starterman

posted on 8/6/18 at 07:55 PM Reply With Quote
Oh and whatever you decide to get don't pay over the odds for it, check with me if you want and I'll let you know what the cost price is.

Cheers
Mike

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starterman

posted on 8/6/18 at 07:56 PM Reply With Quote
quote:
Originally posted by big_wasa
There is no excite wire. Itís fully controlled by the ecu. The ecu puts the light out on the dash. If you unplug it, it will self excite and charge.


They are supposed to self excite and charge at 13.8 volts but only about one in a hundred do. It is a crap design.

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big_wasa

posted on 8/6/18 at 08:04 PM Reply With Quote
Itís all down to emissions and manipulating them, ford where at it years before Vag. They cut the charge at specific times to reduce engine load. They also have a clutch to reduce engine braking.
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starterman

posted on 8/6/18 at 08:06 PM Reply With Quote
quote:
Originally posted by big_wasa
Itís all down to emissions and manipulating them, ford where at it years before Vag. They cut the charge at specific times to reduce engine load. They also have a clutch to reduce engine braking.


That particular part number doesn't come with a clutch pulley, just the 6 rib fixed one

We need to get out more Warren, we know too much stuff lol

[Edited on 8/6/18 by starterman]

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andyhaase1

posted on 8/6/18 at 08:17 PM Reply With Quote
When you search for a Denso 40A alternator on eBay, the top two items that come up are from the same seller, ones a 2 pin, ones a 3 pin, both are £80 . Are these ok?
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starterman

posted on 8/6/18 at 08:26 PM Reply With Quote
A new two pin 40 amp Denso unit with a 6 rib pulley is £66 including VAT and delivery. Thatís my cost price if youíre interested.
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andyhaase1

posted on 8/6/18 at 08:42 PM Reply With Quote
Ok, thanks. Let me speak to the sparky and Iíll get in touch.
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sdh2903

posted on 8/6/18 at 09:40 PM Reply With Quote
quote:
Originally posted by starterman
A new two pin 40 amp Denso unit with a 6 rib pulley is £66 including VAT and delivery. Thatís my cost price if youíre interested.


Hi starterman that's a good price are these genuine denso or pattern? What size pulley do they come with? What's the rev limit range on them?

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andyhaase1

posted on 14/6/18 at 07:31 AM Reply With Quote
I got the alternator from starterman last night, top service Mike thank you.
Nice and small unit too, thatíll give me more air space away from the hot exhaust.
Andy

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ttalps2000

posted on 14/6/18 at 08:18 AM Reply With Quote
I have had the Denso unit from Starterman and is running on my Zetec. Lovely and compact and never had an issue with charging etc. Very easy to wire up.
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andyhaase1

posted on 22/6/18 at 09:11 AM Reply With Quote
Iím just about to wire up my new alternator from starterman. The old fiesta st150 unit had three wires to it, the new denso one has only two connectors. Iíve done a resistance check to earth on each connector, one has 0.9 ohms, the other has 9.0 kilo ohms. So Iíve got orange, blue, grey cables, which cable goes where please?
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big_wasa

posted on 22/6/18 at 10:59 AM Reply With Quote
None of the wires from the Duratec plug are any good to you.

They would be a battery voltage monitor ( the red one ) And the other two are the ecu control.

There is more than one rectifier available on a denso and starterman will be able to tell you better.

If it's a single pin then its just 12v to the bulb ( not led ) on your ignition indicator then to the alternator.

Some have a monitor wire to the battery as well.

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Mr Whippy

posted on 22/6/18 at 03:31 PM Reply With Quote
having just changed one last night and one last year on another car for the same rear bearing issue they don't last very long and cause huge damage to the rear bearing housing
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big_wasa

posted on 22/6/18 at 04:19 PM Reply With Quote
quote:
Originally posted by Mr Whippy
having just changed one last night and one last year on another car for the same rear bearing issue they don't last very long and cause huge damage to the rear bearing housing


Denso ?

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