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View Full Version : Minitruck alternator upgrade?


jacdaw
02-10-2010, 10:38 PM
Any BTDT advice for swapping in a high amp alternator onto my 20R? Ideally I'd like something that drops right in and uses the stock harness, but not critical. I need something more than 45 amps to recharge my aux battery bank in less time on the trail. A reputable local shop that rewinds mine would be perfectly acceptable.

RicardoJM
02-11-2010, 06:48 AM
Give D&D a call. I had them rebuild an alternator for me during my power steering conversion and IIRC the were able to kick the amps up just a bit. I believe others have used them with good results as well.

Red_Chili
02-11-2010, 07:45 AM
You can do a web search for installing a Delco GM alternator as well. Cheaper, and more amps.

DaveInDenver
02-11-2010, 08:04 AM
You can do a web search for installing a Delco GM alternator as well. Cheaper, and more amps.
How much custom bracket fab is required to mount the CS144-type Delco? I understood that this was not a bolt-on swap.

RockRunner
02-11-2010, 08:16 AM
I know there are some Delco's out there that drop in but you need to change the wiring. I will try to find the link(s) to the places.

jacdaw
02-11-2010, 08:22 AM
Is the Delco design internally regulated?

Red_Chili
02-11-2010, 08:24 AM
How much custom bracket fab is required to mount the CS144-type Delco? I understood that this was not a bolt-on swap.
http://images.ibsrv.net/ibsrv/res/src:www.yotatech.com/get/images/smilies/google.gif
I do not know.

jacdaw
02-11-2010, 08:49 AM
The guy at Vanatta that UB suggested was very helpful. My truck came with one of two 55 amp, externally regulated alternators that have different harnesses and are not interchangeable. In '84 the 22RE got a 65 amp internally regulated alternator that is boostable to about 80 amps, but the earlier case has no room for the boost and no one that he's aware of makes a high output wind in that case. His concern with trying to use the '84+ version is choke control. Have to dig into the wiring diagram for that.

He is checking interchange for a Delco type for me and should know by tomorrow morning. Other suggestions are welcomed. I'm not sure why 55 sounds more assuring that 45, but all I'm trying to ensure is that my mobile dialysis rig gets enough juice with a day's trail driving to run for ten hours each night with a 100 watt steady state and 40 minutes of intermittent 600 watt surge. Maybe I'm overly concerned? What's an Engle draw over ten hours?:confused:

leiniesred
02-11-2010, 09:05 AM
Probably not valuable to you and your older 22, but the 3.0 guys use the 100 amp alternator from a 1991 MR2 with power steering. (The MR-2s have electric power steering.)
Yes, you do need to extend the tensioner bracket and get a longer belt and put on a bigger lug on the wire so it isn't a direct drop in, but it is 100 amps of fun.


Me? The 1989 60 amp stocker has lasted 263,000 miles. I can't complain about that. I

jacdaw
02-11-2010, 09:22 AM
<snip>
Me? The 1989 60 amp stocker has lasted 263,000 miles. I can't complain about that. IYup, no complaints here about quality. Everything on my truck is original except tires/wheels, belts, hoses, plugs, wires and fluids. But Uly's only got 89k original miles...:rolleyes:

AddictedOffroad
02-11-2010, 12:22 PM
Here is the mount for the GM one:
http://www.yotatech.com/f37/22r-re-gm-single-wire-alternator-mount-139305/

Or, you can do the Powermaster one through Summit:
http://www.pirate4x4.com/forum/showthread.php?t=451359