Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Alternators

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by ricka, Dec 3, 2001.

  1. ricka

    ricka Registered Member

    Joined:
    Nov 24, 2001
    Posts:
    40
    Likes Received:
    0
    Location:
    Beaverton, Oregon
    I'm shopping around to upgrade my pitiful stock 43 amp
    stock alternator. I want to find a solution that bolts right
    up and uses existing wiring if possible. I'm targeting 140A
    solutions. I think the only reason to go above 140A might be
    if I had a welder, right? Don't expect a 1 MW stereo system
    anytime soon :-) I note the Premier PowerWelder ships with
    a 160A, 170A or 190A unit. Would 140A do in a pinch if I ever
    got an on-board welder?

    Here is what I found in my research today. All of these supposedly
    support a GM application (bolt holes at 12 and 6 o'clock) and are
    either 1 wire or 3 wire (main charging wire and two wire exciter).
    I targeted a sweet spot of around 140A. Most require that you replace
    the existing 1 wire with a higher gauge solution (2, 4 and 8 gauge
    was recommended, so go with 2 :-). I can live with that.

    Source Brand Full Amps/Amps at Idle Cost Part #
    ----------- ----------------- ------------------------ ---- ----------
    JEGS East Coast 140A/? $250 358-2009
    JEGS East Coast 110A/? $199 358-2007
    JEGS Tuff Stuff 140A/? $177 908-7140B

    MG Ind. Mean Green 140A/110A $369 MG7128
    MG Ind. Mean Green 240A/? $369 ?

    Summit Summit 140A/15A $170 SUM-G1669
    Summit Magnum 80A $100 ?
    Summit PowerMaster didn't check, but they carry them

    4WPW PowerMaster 140A/80A $149 47294(natural)

    PowerMaster PowerMaster 140A/80A $155 47294(natural)
    PowerMaster PowerMaster 140A/80A $185 47294 (w/thermal black coating)

    WrangerNW WrangerNW 150A/? $270 ?

    PremierPW Premier PowerWelder 160A/60A $400 PP160CS (add$400 for welder :-)
    PremierPW Premier PowerWelder 170A/70A $500 PP170CS
    PremierPW Premier PowerWelder 190A/100A $561+ PP190
    PremierPW Premier PowerWelder 220A/80A $625 PX22OT(fit?)

    Yep, Mean Green charges one price regardless of amperage. Don't understand
    that philosophy. And yep, who would buy the Summit brand one with 15A at
    idle. Yeck.

    Did not price any rebuilders of my existing alternator, although we supposedly
    have a place around here that does it for $1 per amp, so a 140A would be $140.

    I'm very tempted to go with the PowerMaster 140A solution. Seems like
    about the right amperage and a decent cost. They've been around a while.
    Anyone have one of their units (any amperage) and any good or bad
    experiences?

    I'm curious. Many of the alternators will support either 1 or 3 wire.
    If you get one of these and have it already wired for 3 wire, would you
    use just the single wire or all three? I'd be tempted to continue to
    use all three, but am a little unclear exactly how the exciter circuit
    works, where it comes from, etc.

    ...

    Also found out the Mean Green starter for my application is $299 (part #MG3520).
    It's smaller, lighter and puts out 2x-3x more torque (just in case anyone was
    looking :-)

    -------
    Rick Anderson (rick.d.anderson@tektronix.com)
    Tektronix, Inc. Beaverton, OR 503-627-2630
     
  2. 2Dogs

    2Dogs 1/2 ton status Premium Member

    Joined:
    May 4, 2001
    Posts:
    3,470
    Likes Received:
    35
    Location:
    Ca
    Did you collect data on idle amperage?

    I know Wrangler NW has 100 amp at idle alternators. I want one bad!

    Dave

    Horn Broken... Watch For Finger.
    <a target="_blank" href=http://coloradok5.com/gallery/Daves-Pics>http://coloradok5.com/gallery/Daves-Pics</a>
     
  3. BobK

    BobK 1/2 ton status

    Joined:
    Oct 5, 2000
    Posts:
    1,604
    Likes Received:
    0
    Location:
    Petrolia,Ontario,Canada but working in Port Huron,
    My Summit brand 140 amp 1 wire alt. is actually made by Powermaster.It's alot cheaper too! Got a service notice from them(Powermaster)Apparently the fan gauge is too thin so thier sending me a new fan for the alt.Anyway back to the topic.My alt is rated at 140 amps but the test at the factory read 90 amps at idle and 163 amps at highway speeds,&gt; than 2500 rpm.

    <font color=green>BobK<font color=green>
     
  4. ricka

    ricka Registered Member

    Joined:
    Nov 24, 2001
    Posts:
    40
    Likes Received:
    0
    Location:
    Beaverton, Oregon
    I know the table is hard to read, but the one column has both maximum
    amperage and idle amperage. I don't have it for all, but for the ones
    I asked on, the data is there. Look closely.

    -------
    Rick Anderson (rick.d.anderson@tektronix.com)
    Tektronix, Inc. Beaverton, OR 503-627-2630
     
  5. ricka

    ricka Registered Member

    Joined:
    Nov 24, 2001
    Posts:
    40
    Likes Received:
    0
    Location:
    Beaverton, Oregon
    Note sure we are talking about the same one as I saw. The tech info from
    Summit said 140A maximum (@ 6,000 rpm! It specs 100A @ 3,000 rpm), but
    at idle, it was only 15A. Visit www.summitracing.com and enter the part
    number to see the details. Also, the picture on the Summit web site does
    not match the picture on the PowerMaster web-site, although I must admit
    the Powermaster one is a late model picture.

    Please advise if you have more details or can explain the differences, as
    I'm not adverse to saving a buck!

    -------
    Rick Anderson (rick.d.anderson@tektronix.com)
    Tektronix, Inc. Beaverton, OR 503-627-2630
     
  6. 2Dogs

    2Dogs 1/2 ton status Premium Member

    Joined:
    May 4, 2001
    Posts:
    3,470
    Likes Received:
    35
    Location:
    Ca
    Yes, I see now. Good work!

    I don't know if this is anarea where you will find tremendous savings. These alternators are expensive!



    Dave

    Horn Broken... Watch For Finger.
    <a target="_blank" href=http://coloradok5.com/gallery/Daves-Pics>http://coloradok5.com/gallery/Daves-Pics</a>
     
  7. BobK

    BobK 1/2 ton status

    Joined:
    Oct 5, 2000
    Posts:
    1,604
    Likes Received:
    0
    Location:
    Petrolia,Ontario,Canada but working in Port Huron,
    Rick,Here is a link to the service notice I got from Powermaster.
    reg pic.
    http://www.imagestation.com/picture/sraid27/p72641265e0aa00b70e47d3c2e55e93bb/fe183864.jpg.orig.jpg

    here is a pic of the summit ad I saw when I ordered my Alt.I ordered the one on the left,the Powermaster is on the right.
    <a target="_blank" href=http://www.imagestation.com/picture/sraid27/pc919449ddcd1868b2c1042a276878048/fe1838bf.jpg>http://www.imagestation.com/picture/sraid27/pc919449ddcd1868b2c1042a276878048/fe1838bf.jpg</a>

    <font color=green>BobK<font color=green>
     
  8. ricka

    ricka Registered Member

    Joined:
    Nov 24, 2001
    Posts:
    40
    Likes Received:
    0
    Location:
    Beaverton, Oregon
    Ok, so you've convinced me the Summit one is a PowerMaster. How much did you
    pay for it? The ad doesn't show the 140A PowerMaster part #47294. This unit
    from PowerMaster is $155. From Summit, I'll be it's $145 or so.

    Note that the Summit alternator I saw for $170 with 140A at 6,000 rpm and only
    15A at idle was part #SUM-G1669. This does not match the part numbers in your
    ad at all, which makes me think it's not a PowerMaster unit.

    So have you been happy with your PowerMaster unit? Did you hook up one or
    three wires (and why did you chose)?

    No one else out there with a PowerMaster unit?

    -------
    Rick Anderson (rick.d.anderson@tektronix.com)
    Tektronix, Inc. Beaverton, OR 503-627-2630
     
  9. txbartman

    txbartman 1/2 ton status

    Joined:
    Jun 1, 2001
    Posts:
    1,975
    Likes Received:
    0
    Location:
    Plano, TX
    there are other reasons to go to higher amperage other than stereo or welder. I run a 180A alternator from a local alternator shop. It carries a 1 year warranty, is black powder coated, and outputs 180A @ 2500 and 85A @ idle. It was wound in a factory casing so it fit fine in the original locale.

    As far as how much ampergae, you need to think about if you will ever run (a) offroad lights or (b) a winch as well. Many winches require a ton of amperage. A 4000 lb pull on a Warn 9500 will draw around 230A. You aren't going to get an alternator with that kind of amperage, but any additional flow may be appreciated. I currently run dual batteries to help with that as well. Also consider offroad lights. A 100W light will draw 9A and a 130W will draw 11A (these are off the top of my head, so I could be wrong). At maximum lighting on my truck (forward facing only), I draw 58A from the lights alone. And often that is at idle or low RPM. Just some thinks to keep in mind.

    Brian
    Check out <a target="_blank" href=http://tx85gmcguy.alloffroad.com>My Jimmy</a> with all her projects!
     
  10. txbartman

    txbartman 1/2 ton status

    Joined:
    Jun 1, 2001
    Posts:
    1,975
    Likes Received:
    0
    Location:
    Plano, TX
    Oh yeah, my 180A alternator was $150. May not last as long as some of the other new ones, but it has worked fine for me to this point (6 months).

    Brian
    Check out <a target="_blank" href=http://tx85gmcguy.alloffroad.com>My Jimmy</a> with all her projects!
     
  11. ricka

    ricka Registered Member

    Joined:
    Nov 24, 2001
    Posts:
    40
    Likes Received:
    0
    Location:
    Beaverton, Oregon
    Yep, good comments. I guess I'm trying to trade off amperage with cost, heat generation
    and potentially reliability (although can't say for sure that higher amp alternators are
    less reliable). I do have dual batteries and a winch and one pair of off-road lights, so I
    can draw a lot.

    -------
    Rick Anderson (rick.d.anderson@tektronix.com)
    Tektronix, Inc. Beaverton, OR 503-627-2630
     
  12. Executioner

    Executioner 1/2 ton status

    Joined:
    Feb 22, 2000
    Posts:
    1,530
    Likes Received:
    0
    Location:
    Temp. Ft. Walton Beach Fl. home=Tucson, Az.
    And your getting by with the stock 43 Amp unit ?
    It must be one heck of a unit, I'd keep it and mount another one, to match your dual battery set-up.
    If one should fail, you have a spare !
     
  13. BobK

    BobK 1/2 ton status

    Joined:
    Oct 5, 2000
    Posts:
    1,604
    Likes Received:
    0
    Location:
    Petrolia,Ontario,Canada but working in Port Huron,
    Rick,well, here is my receipt for the alt.The cost was $169.99.You can see the part # is SUM-G1669.
    I went with the 1 wire alt as I have put in TPI fuel injection,55watt Hella driving lights,a mild soud system and Warn 9000 lb winch.What did in the old 100amp alt was the addition of dual 14"electric cooling fans.
    The install is a 1 wire.One 2 gauge welding cable straight from the alt. to the battery.All gauges work as they should including the voltmeter.No prob. with the alt since Iput it in.I also run dual batteries managed by a Hellroaring BIC-75300A<a target="_blank" href=http://www.hellroaring.com/bic75300.htm>http://www.hellroaring.com/bic75300.htm</a>
    I'm very happy with the performance of the alt.
    pic of receipt.
    <a target="_blank" href=http://www.imagestation.com/picture/sraid27/pe378d7b6da836c5b486f3e0bcd4ec075/fe180831.jpg>http://www.imagestation.com/picture/sraid27/pe378d7b6da836c5b486f3e0bcd4ec075/fe180831.jpg</a>

    <font color=green>BobK<font color=green>
     
  14. ricka

    ricka Registered Member

    Joined:
    Nov 24, 2001
    Posts:
    40
    Likes Received:
    0
    Location:
    Beaverton, Oregon
    $169 for the Summit SUM-G1169. Yep, that's the same number I saw on the web site.
    So the web site must be wrong with respect to the 15A number at idle.

    Potentially more imporatant though, is PowerMaster wants $155 for this same unit
    and you can get it at 4WPW for $150. Don't quite understand why Summit's price
    is more. Don't know if SUM-G1169 = PowerMaster part #47294, but I'll bet it
    does. Is your unit chrome, or natural? The $155/$150 price is for the natural
    one. Chrome is more.

    By the way, the guy who got the 180A alternator for $150 - that's a great deal.

    -------
    Rick Anderson (rick.d.anderson@tektronix.com)
    Tektronix, Inc. Beaverton, OR 503-627-2630
     
  15. Predator

    Predator 1/2 ton status

    Joined:
    Jun 19, 2001
    Posts:
    130
    Likes Received:
    0
    Location:
    OKC,OK
  16. DPI

    DPI 1/2 ton status

    Joined:
    Jun 22, 2000
    Posts:
    2,792
    Likes Received:
    1
    Location:
    In the Burbs close to Tulsa, OK
    Here is a single wire 140 Amp for $139 from <a target="_blank" href=http://www.sdpc2000.com/cart.asp?action=prod_detail&amp;catid=1606&amp;pid=14048>Scoggin-Dickey</a>
     
  17. ricka

    ricka Registered Member

    Joined:
    Nov 24, 2001
    Posts:
    40
    Likes Received:
    0
    Location:
    Beaverton, Oregon
    This web site doesn't tell what the idle amperage is. Do you have
    any idea? $140 for a chrome (not that I care) 140A alternator is
    a good deal, but I fear the amps at idle is probably low.

    -------
    Rick Anderson (rick.d.anderson@tektronix.com)
    Tektronix, Inc. Beaverton, OR 503-627-2630
     
  18. BobK

    BobK 1/2 ton status

    Joined:
    Oct 5, 2000
    Posts:
    1,604
    Likes Received:
    0
    Location:
    Petrolia,Ontario,Canada but working in Port Huron,
    Rick,it's just the natural finish.$150.00 huh,and I thought I was doing o.k. at $169.00.My Summit catolog says the Powermaster G.M. 140 amp alt..part #PWM-37294(unpolished) is $199.95.That's why I chose the Summit brand.I don't see the Powermaster part # you listed in my catolog.
    Here's a pic. of the installed alternator.The large pink tube coming from the rear of it is actually the 2 gauge welding cable I used to connect to the battery.
    <a target="_blank" href=http://www.imagestation.com/picture/sraid26/pc4700ecf1453a3ae079626b83df5e7d5/fe406895.jpg>http://www.imagestation.com/picture/sraid26/pc4700ecf1453a3ae079626b83df5e7d5/fe406895.jpg</a>

    <font color=green>BobK<font color=green>
     
  19. therover87

    therover87 1/2 ton status

    Joined:
    Jun 24, 2001
    Posts:
    139
    Likes Received:
    0
    Location:
    Long Island, New York
    i just bought a Powermaster Alternator part #47294, its very easy to hook up the only thing i had to do is to change the pulley cause it comes with a v-belt pulley on it a took my old serpentine pulley off the old alternator.
     
  20. txbartman

    txbartman 1/2 ton status

    Joined:
    Jun 1, 2001
    Posts:
    1,975
    Likes Received:
    0
    Location:
    Plano, TX
    I live in the Dallas area and this is the same company where I bought mine. I just drove down and picked it up from them. They are located in the industrial part of west Dallas.

    Brian
    Check out <a target="_blank" href=http://tx85gmcguy.alloffroad.com>My Jimmy</a> with all her projects!
     

Share This Page