i searched through pages and pages of info, but i didnt find the anwsers to the few questions i had...

say i upgraded my alternator to 140 amp one (because it available through lmc truck) would i have to worry about the extra power output damaging components?

im also going to buy the alternator wire upgrade kit available through fordfuelinjection which replaces stock wires to the 2 gauge wire and fuse etc...

is there anything else i should change during the upgrade for the extra power?

 

nobody knows?

 

Your voltage remains at around 14.4, that is what is important. The amp output don't make any difference. All that means is that you will have the power to supply many more accessories. You should not have a problem.

 

No problems yet with the upgrade that I did to the 135 amp alt. The built in regulator prevents the alternator from putting out too much juice. All you are doing is increasing your capacity to handle a higher amperage draw without overworking your tired old alternator. With my current set up, when the two electric fans kick on the amp guage plunges for just a split second and then kicks right back up again to the centre of the guage. It never falls from there after it has upped it's output to match the draw. I'm pretty sure that the old 65 amp alternator would have burned itself up long ago trying to keep up with the regular draw plus the two fans.

You shouldn't have to worry about changing anything else since you are buying all of the harness etc. designed for this swap. I used junk yard parts and have no prblems whatsoever with the setup.

Keep us posted and let us know if you have any other questions.

Cheers!

Mike

 

That is the best and most important mod you can do for your truck, the original alts were pure junk. I think There are many other places you can get the upgraded alternator, other than LMC...Before you bust a knuckle, you may just want to make a few calls, a local alt/starter shop might be able to do it better. Three years ago, I let my local shop upgrade my alt and harness for 200 bucks, and it has run perfect since then. It took them 15 minutes while I waited.

 

is that including the alt? and how big was the alt?

 

I had a 3rd gen alternator 100A (95A?) installed and wired for 200 bucks.
If you go to Fordfuelinjection, and click Alternator Files, my exact unit is pictured and described in the first part of the 3G section. I was assured that the alternator was rebuilt by the shop using heavy-duty parts. I ordered it, set-up a saturday appointment and had it installed, these guys had their own wires, and lugs, the alternator didn't require a "harness", in fact, going from 2G to 3G simplifies things as you eliminate one big POC plastic connector.
if you have been using a 2Gen alternator(2 plastic connectors, external regulator, and external fan) then you will be very pleased by simply upgrading to 3rd generation 95A( smaller pulley, internal fan, and quailty electrical lugs) The 2G 65A, was prone to early bearing failures, and would not put out anything near 65A under standard electrical loads, The 3G was a good answer to a very bad problem, the 3G puts out what is promised always, and can handle any stock electrical system load...Don't ask me about anymore if you are setting up 2000 watt stereos, super-duper foglights or other utilities..then you may need a 135A.

Oh PS my truck is 92 XLT F150, and the alternator just popped right in, no cutting required, just the wiring mods.