How many AMPS does a 6.9l IDI's alternator put out?

[mankypro]

Figured I could get a fast answer here

 

[towcat]

large case or small case alt?
small 70a
large 100a
post a pic of yours if you are unsure.

 

[Agnem]

Not enough.

 

[towcat]

Not enough.

very true. my towtrucks have the 100a modded to 130a with a low rpm cut-in and they barely keep up with the lights. Note, the mod is not a DIY job and the harness requires extensive modification.

 

[mankypro]

I'm thinking of adding an electric winch and a couple of adhesive backed tank heater pads. The pads are available in 12v and 120v.

 

[EMD_DRIVER]

Where are the heater pads available from?

 

[mankypro]

several online vendors, this is one:

http://www.plantdrive.com/html/products.html

 

[MIDNIGHT RIDER]

very true. my towtrucks have the 100a modded to 130a with a low rpm cut-in and they barely keep up with the lights.

I have the same old factory alternator that was on the 6.9, with un-telling how many hundreds of thousands of miles on it.

It is whatever size that everyone I have ever seen on a Ford diesel is.

Don't get me wrong; I would like to have a big Leece-Neville, or some-such dynamo-type unit; BUT, my truck alone has well over fifty markers, along with Silverstars, fogs, floods, and spots, and enough copper wire and electrical goodies to be a load by themselves, and I have never ever felt that the alternator was not up to the task.

I can turn on every light on truck and trailer (probably 80 to 100 markers on the trailer), let the engine idle, and the headlights will be bright as ever.


I believe those trucks that the lights brighten in relation to engine RPM have more wrong than a wimpy alternator.

 

[mankypro]

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[Ford428CJ]

I had mine custom built and it puts out 160 Amps. Not cheap .

 

[mankypro]

guess i'll toss my meter on it to figure it out...

 

[RKOCH]

I am running a Herr Powerline big case motorcaft 180 AMP.

 

[lotzagoodstuff]

Don't get me wrong; I would like to have a big Leece-Neville, or some-such dynamo-type unit; BUT, my truck alone has well over fifty markers, along with Silverstars, fogs, floods, and spots

QUOTE]

Holy Schnikeys! 50 marker lights: people must really see you coming

I agree with your take on headlights being a good tell tale sign of your charging system.

You need to post a pic of your truck with all the lights on at night

 

[MIDNIGHT RIDER]

I am running a Herr Powerline big case motorcaft 180 AMP.

Can someone post a size/comparison picture showing both the large and small case alternators ??

Thanks.

 

[BigRigTech]

I had a 100A on my 7.3 until it took a dump 2 weeks ago, now I have a used 70A on it from a 6.9 and it actually peaked at 85A when I had it checked before I installed it.