Info: High output alternators
- Thread starter duramaxzak
- Start date
I replaced the anemic fusible link charge wire to a 4 gauge cable, I also added an additional 4 gauge charge cable from the alternator to the passenger battery. Take a close look at the stock charging system, it was not designed for optimum charging to the passenger battery.
I had some unexpected results after replacing the alternator with one that put out 150 amps at idle and it was not the Denso hairpin alternator as planned and did not use an under sized pulley ...
Hello, what were your results? My alternator died and I’m looking at going with a higher output one. I like your idea of running a charge lead to the passenger battery. I think I’ll do that myself.
I think I clicked on the wrong quote! 
did you end up getting the Rare Electrical one?2007 LBZ, CCLB dually, 475 over stock, EFI tunes by Idaho Rob (damn EPA), 30% over, Mike L built tranny, other odds and ends
I've bought quite a few of the rare electrical ones and to my knowledge, my customers have only told me about one of them not lasting very long. Bearing failed. Maybe 1 of 20 or so? I've had more issues lately with voltage regulators in the 08+ style than anything. I get them rebuilt locally most of the time and keep some in stock.
Thank you for your input!
2007 LBZ, CCLB dually, 475 over stock, EFI tunes by Idaho Rob (damn EPA), 30% over, Mike L built tranny, other odds and ends
Thank you!
2007 LBZ, CCLB dually, 475 over stock, EFI tunes by Idaho Rob (damn EPA), 30% over, Mike L built tranny, other odds and ends
I’ve ordered one, I talked to a few people who have had good success with them. My local parts guy at Carquest had heard a lot of good also, although he couldn’t get me one. I guess the plow guys around here like them. I also talked to the company. All new parts, one year warranty, after one year any repairs you pay parts only at cost, no labor, he said you’re part of the family. Seem like good people with an American made product. The only challenge I see is if you do have an issue you are down for a bit with shipping back and forth. I was thinking about trying to find a rebuild kit for my stock one to have a back up just in case.
2007 LBZ, CCLB dually, 475 over stock, EFI tunes by Idaho Rob (damn EPA), 30% over, Mike L built tranny, other odds and ends
Summit and JEGS are cheaper than Dmaxstore
2007 LBZ, CCLB dually, 475 over stock, EFI tunes by Idaho Rob (damn EPA), 30% over, Mike L built tranny, other odds and ends
2007 LBZ, CCLB dually, 475 over stock, EFI tunes by Idaho Rob (damn EPA), 30% over, Mike L built tranny, other odds and ends
From them you can get natural aluminum which is cheaper yet, $298 is what I paid
2007 LBZ, CCLB dually, 475 over stock, EFI tunes by Idaho Rob (damn EPA), 30% over, Mike L built tranny, other odds and ends
I have a DC power on lmm and Mechman 370 amp, on the lbz. Both have been great no issues. most aftermarket alternators come with smaller pulleys you may need to get a shorter belt. I found a continental belt at local auto parts store that worked. I up graded power and ground wires in the setup. Make sure you install fuses if upgrading wires. Most just run power cables direct to the battery. I have changed up to 5 batteries while towing. Big thing is to find out what amps it puts out at idle as well max. If it only does 50 amp charging at 2000 rpm then ramps up from there it’s defeating the purpose of getting a high amp alternator.
Had one on my lmm, it didn’t put out much amperage at idle. At times the low charge light would come on. There are better options out there
For the lbz they make a bracket that puts the second alternator where the dual cp3 would be. Then you can get the wiring kit to splice it in. You can not have the positives outputs touching anywhere. They are separate systems for the regulators.
Gotcha. On my LB7 I'm running 2x Mechman 240a wired to the ECM to regulate turning them both on.
The l5p alternator won't work on an lbz or older. Up to the lbz gm used the 4 pin regulator, lmm+ went to the 2 pin regulator that works with the charge control module.