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Bracket fitment for a Powermaster 150amp 1-wire alternator in a 3.8L

  • Thread starter Thread starter badcrc
  • Start date Start date Jul 3, 2021
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badcrc

Member
Feb 10, 2018
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Jul 3, 2021
#1
  • Jul 3, 2021
  • #1
So my niece has my 84 3.8L hatch now, and I installed a new stereo system and she ordered LED halo lights. I know from some videos that the lights suck up enough juice to cause problems with the stock alternator, so she went out and bought a Powermaster 150amp 1-wire alternator that O'Reilly's and Powermaster said would fit in the car. Model number is 8-57140, pic attached. With the bottom bolt installed the side of the alternator hits the bracket. The top mounting hole is several inches away from the bracket hole. I wedged the Powermaster in place and tightened the belt and made a cardboard template in the shape of a new bracket I think I can make that mounts on the top mounting hole and uses one of the bolts for the current bracket, plus one hole on the end for the Powermaster. Before I go through that does anyone know of a bracket that already fits on a 3.8L? Powermaster makes one for the 5.0 but that's not gonna work on the 3.8. I saw some guys were able to grind down the bracket on different Mustangs and get it to work, but I don't think that's possible with this one because it's just too far off.
 

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badcrc

Member
Feb 10, 2018
15
4
13
Jul 3, 2021
#2
  • Jul 3, 2021
  • #2
Here's the bracket that I need to make it work. As you can see the mounting hole is pretty far off, but with the bracket and a spacer between it and the Powermaster I think it would work and the belt still seems to fit.
 

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General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
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polk county florida
Jul 3, 2021
#3
  • Jul 3, 2021
  • #3
Have you talked to the manufacturer to see if this is in fact the correct part?
 
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badcrc

Member
Feb 10, 2018
15
4
13
Jul 3, 2021
#4
  • Jul 3, 2021
  • #4
General karthief said:
Have you talked to the manufacturer to see if this is in fact the correct part?
Click to expand...
I've emailed the guy I talked to at Powermaster to see what he says, no response yet.
 
Reactions: General karthief

CarMichael Angelo

my rearend will smell so minty fresh,
15 Year Member
Nov 29, 1999
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Birmingham, al
Jul 5, 2021
#5
  • Jul 5, 2021
  • #5
It’s a GM style alternator with mounting ears configured to fit “most” ford engines. It is still a universal fit. I have that exact one on my car ( currently mounted on a 2jz). It works great, provides the extra amperage to run all of my electronics and maintains 14v at idle.
 
Reactions: badcrc
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chrlsful

Active Member
Mar 6, 2021
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Lawrence Swamp, S.Amherst, MA
Feb 6, 2022
#6
  • Feb 6, 2022
  • #6
got 1 65$ but 3G, the ford product (1 or 2 steps above the 200$ PM. I cut the oem bracket, welded a lill pie shape in there (simple extention btwn the furthest to L sharpie dots) so the slot can still B used to wege the alt OUT board to tighter the adj nut. Here:

Chrome Alternator Tension Adjusting Bracket, 1966-77 Ford Bronco

Chrome alternator tension adjusting bracket allows precise belt adjustment. Durable steel construction with corrosion-resistant finish ensures reliable performance.
tomsoffroad.com

that the right idea?
 
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