What's the best alternator to get? Looked around on other forums and it seems rebuilt ones from Napa, Oreillys etc get a bad rap.
Best alternator?
- Thread starter HoosierJeeper
- Start date
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Computer controls output so not any difference
NAPA remanned from what I have seen
I would be temped to say since the OEM's last so long, the best would be a Mopar.
I can't believe how many choices are listed under rock auto!
https://www.rockauto.com/catalog/raframecatalog.php?make=JEEP&ck[ID]=0&ck[idlist]=0&ck[viewcurrency]=CAD&ck[PHP_SESSION_ID]=flqrgputjevi0cl6q99qu0ael2
I can't believe how many choices are listed under rock auto!
https://www.rockauto.com/catalog/raframecatalog.php?make=JEEP&ck[ID]=0&ck[idlist]=0&ck[viewcurrency]=CAD&ck[PHP_SESSION_ID]=flqrgputjevi0cl6q99qu0ael2
Yeah, I used a Denso reman from them. No problems.
BigRich201
Full Access Member
it sure as shit showed a difference for me when i got it. fully lit at idle i was only getting 12.5 volts now with the renegade alternator it runs at 13.5 volts all day long at idle fully lit.
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renegade 04
Full Access Member
If you do not like the idea of letting the computer control the alternator field current just add a external voltage regulator like I did.
I'll go with the rock auto Denso. Same price as a remanned.
:happy175:
I get 13.7 or so all the time on both of my STOCK SPORT alternators
Happy you think it makes a difference
It looks like he might have enough lights to push the limits of the stock alternator [emoji14]
The renegade alternator can push an extra ~10amps at idle, so if he was getting close to the max for the stock alternator at idle it would drop to its minimum regulated voltage (12.5) as it tried to maintain current, when he has extra capacity available the voltage returns to its max around 14 because the alternator is easily maintaining current
Maybe check out what Troy, ( tjkj) is running light wise and sound wise, with stock alternator
Personally I had at one time , pair of Hella fogs, headlights, pair of LED pods, and 6 hellas just on the front of mine, at idle it never dimmed
You can throw figures out all day still doesn't change anything at all:emotions34:
Hoosier, stock just what came with the KJ will work just fine
BigRich201
Full Access Member
yeah but none of your jeeps have the amount of lights mine does. my lights never dimmed but 12.5 volts fully lit was a bit scary so i upgraded. and since i did no more voltage drop
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Yeah I'm just getting the 136 one...no extras besides the winch. Probably go with the Denso one from rockauto.
tjkj2002
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I do....................
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Plus a winch and more lights facing rearwards.
With stock 136amp alternator I was still over 14 volts with all the lights on,would dip down to 12 volts with all lights and using the winch but the winch does draw 400+ amps which no alternator can keep up with.
2 years ago I did replace it with a slightly juiced 145amp OE alternator(denso version),replaced just due to age not failing.I now output 14.5 volts with all the lights on,guess the 11 year old OE 136amp alternator was getting a tad tired.
At idle the renny alternator(160amp) does not put out any more amps then the stock 136 amp version.At 5000rpm's(alternator speed,cruise speed of vehicle) the difference between the renny alt and 136amp alt is 11amps.
I see 8 Hellas in your sig
so how is that more ? LOL
Its all in fun but :emotions34:
renegade 04
Full Access Member
One way to make sure you get all you can out of a alternator is to ditch the computer controlled voltage regulator and add a external voltage regulator. I can change the charging voltage to what ever I want, but I never want to be running anything over 14.8 volts.
tjkj2002
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The one in the PCM is exactly like a external regulator,just different locations and does the exact same thing.
There are only 2 differences....................
1-if the PCM 1 goes you need a new PCM(very rare for PCM integrated regulators to go bad,very common for external regulators to go bad).
2-the PCM regulator will reduce,or stop charging the battery under high heat conditions which will extend the life of the battery.
Reminds me of the old cowboy who couldn't count the cows as fast as they ran through a gate. Trail boss told him to just count their feet and divide it by four.
Bob.
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renegade 04
Full Access Member
The reason why I have a external voltage regulator is because the internal one crapped out and I was not going to pay thousands of dollars to replace the ECM.
