6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

Data of a 140a Alternator with a smaller overdrive pulley

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Old 04-23-2019, 10:29 PM
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Data of a 140a Alternator with a smaller overdrive pulley

I've put so much of this data in threads here before, not sure it's of much use to regulars. But it's going live on YouTube.

Click the title in the video box to go to YT and view in HiRez.



 
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Old 04-26-2019, 04:15 AM
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Nice video, and all the info in one place. As an XL owner 140A is plenty for me!
 
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Old 04-26-2019, 06:28 AM
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Thanks. Yeah. the 140 is the amp that should have been installed in these from P131 product launch.
 
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Old 04-28-2019, 10:45 PM
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Great video watching it the second time. The aftermarket piece of junk alternator died on my newly acquired E350 5.4 l van and I replaced it with a 130 amp Ford RM alternator (new no longer available). Is the 58 mm pulley a good idea for the gas van?
 
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Old 04-28-2019, 10:54 PM
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Thanks for another view count!

First, you may not need it. The 6.0 need is because of the initial load of the glow plugs and the overall health of the FICM. The gas van should only matter if you are running a lot of accessories. But the other issue is the gas motor will govern out at a higher rpm. So if you run it wide open on a steep grade or for passing, the overdrive pulley has the potential of spinning the alternator above it's designed top speed. Sort of. A good engineer would give it a 25% factor.

You going to have to monitor your voltage and see how it does. Then the decision for an overdrive pulley or larger alternator.
 
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Old 04-30-2019, 06:34 PM
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Great detail Jack. Thanks. I have the 140 installed but have not added the pulley. I need to do it soon but the 140 alone makes a nice difference. I never found that bolt I dropped into oblivion, but I search every time I'm in there.
 
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Old 04-30-2019, 07:22 PM
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Thanks. I never found my led cordless light I left underhood either. Even pulled the motor, still couldn’t find it.

The small pulley is a cost effective boost, you’ll be happy with it when you do.
 
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Old 04-30-2019, 09:46 PM
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Originally Posted by TooManyToys.
Thanks for another view count!

First, you may not need it. The 6.0 need is because of the initial load of the glow plugs and the overall health of the FICM. The gas van should only matter if you are running a lot of accessories. But the other issue is the gas motor will govern out at a higher rpm. So if you run it wide open on a steep grade or for passing, the overdrive pulley has the potential of spinning the alternator above it's designed top speed. Sort of. A good engineer would give it a 25% factor.

You going to have to monitor your voltage and see how it does. Then the decision for an overdrive pulley or larger alternator.
I will be monitoring the voltage. I don't run a lot of accessories. We run AC front and rear all day when driving. Stock is probably good enough.

BTW, I forgot to torque the pulley bolt on the alternator! I gave it one blast with my Milwaukee drill driver (not true impact wrench). Do I give the nut a few hits with my Milwaukee impact tool? I can remove the alternator is 10 minutes. The failed alternator had a lock washer. I was thinking of replacing it with a flat washer as I don't know the quality of the lock washer and believe most are more of a marketing gimmick.
 
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Old 04-30-2019, 10:16 PM
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Depends on the size of your impact! I flipped the pulleys probably a dozen times at least, and I used my impact. I think the L-N even came with a split washer, which I re-used.
 
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