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Which distributor???

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Shawn, Feb 25, 2001.

  1. Shawn

    Shawn 1/2 ton status Premium Member Author

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    I found the hardway that I can no longer run my large cap HEI distributor if I want to control the timing though Holley's Commander computer. The setup basically requires a late 80's - early 90's GM distributor (has 2 oval plugs).

    I've found a stock one through GM that runs $153. It's brand new, not rebuilt.

    Accel makes a billet distributer rated up to 10,000rpm. Has the same connections for the computer. This one runs $240 through Summit.

    My question, is it worth to pay an extra $90 and get Accels, or would I be ok with a stock setup? The engine is only going to see 5500rpm.

    Shawn
    87 K5
    few mods[​IMG]
    <A target="_blank" HREF=http://www.off-road.com/chevy>http://www.off-road.com/chevy</A>
     
  2. Sparky

    Sparky 1/2 ton status

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    Depends what ya want. If I were you, i would get the stock distributor for a truck. It sounds like the distributor you mentioned is ment for a hot rod or something like that. If you get a distributor for a truck, the timeing advance will come in much sooner than with a hot rod type distributor. Also, the timeing does not advance as much that way you can still run off the chep pump gas. Just my 2 cents.

    Sparky

    When all else fails... Check the blinker fluid.
    78 K-5
     
  3. Gandolf

    Gandolf 1/2 ton status

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    If you are running 5,500 RPM or less, the stock distributor will work just fine. The extra money spent on the Accel would be for looks, not added performance. Back in my flatbottom boat racing days, we ran stock GM distributors on the 427 BBC at 7000 RPM with no problems. Are you close to firing up that awesome BBC?


    '89 K5 Silverado..."You can’t have a real adventure, unless the outcome is truly uncertain".
     
  4. Eric78K5

    Eric78K5 1/2 ton status

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    Shawn,
    I offer a third choice...I've used the billet distributor from MSD. I think it costs around the same as the Accel, within a few dollars anyway. In my humble opinion, it's a better one than the Accel. I would choose either the stock GM, (with maybe a hotter coil in cap), or go with a MSD. Good luck! And thanks again for all the help you've given me.

    Eric78K5
    K5-Because Size Matters!
     
  5. Gandolf

    Gandolf 1/2 ton status

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    If you decide to go with the billet distributor, I agree...I would go with MSD over Accel.

    '89 K5 Silverado..."You can’t have a real adventure, unless the outcome is truly uncertain".
     
  6. Eric78K5

    Eric78K5 1/2 ton status

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    Shawn,
    I just thought of one more choice. A company called D.U.I., Davis Unified Ignition. I know several drag racers that use their stuff, and love them. I think they can set it up anyway you want. Hope this helps.

    Eric78K5
    K5-Because Size Matters!
     
  7. Shawn

    Shawn 1/2 ton status Premium Member Author

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    Wow, thanks for all the quick responses! I'd consider MSD but I didn't see any stock replacements with the 2 plug style. If I stay with the stock GM (or Accel) 2 plug distributor, I won't have to cut any wires on the Holley computer harness. Another thing I noticed about the MSD is the body is much larger than the GM or Accel. It has to fit in a small area and you can see by the pic below that the fuel line goes between the 2 fuel rails which the larger HEI doesn't like. I'm also thinking it would be nice to have stock cap/rotor which both GM and the late model GM Accel distributers have. The stock cap/rotor/module make it nice in case if those parts are ever needed if failure occurs on the trail.

    Large GM HEI- It don't fit!
    [​IMG]

    Should have it going soon. Waiting for the larger Holley injectors to show up and a few other things.

    Shawn
    87 K5
    few mods[​IMG]
    <A target="_blank" HREF=http://www.off-road.com/chevy>http://www.off-road.com/chevy</A>
     
  8. Shawn

    Shawn 1/2 ton status Premium Member Author

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    Do you have a web address or phone # for DUI?

    I did find that MSD does make the late model distributer which looks like a GM cap is used like the Accel. Summit has it for $290 (part #8366). I'm trying to save a few bucks so the new GM distributer for $153 is looking good at this time.

    Shawn
    87 K5
    few mods[​IMG]
    <A target="_blank" HREF=http://www.off-road.com/chevy>http://www.off-road.com/chevy</A>
     
  9. pcorssmit

    pcorssmit 1/2 ton status

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    I'd go stock GM. These distributors have NO advance built into them, it is all done by the computer, to it shouldn't matter which one you get in this regard. They run an external coil, you can hook up whatever you want to it, I had an Accel super coil on mine for a while, and my MSD box works fine with the distributor.

    Davis builds large cap GM HEIs for other applications (Ford, AMC, etc.), not sure what else they make. They advertise in some of the mags -- try Car Craft or one of the 4x ones.

    Pete

    '83 K5, 350 TBI (ex 6.2), 700R4, NP208, Dana 60/14 bolt, 4.56s, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     
  10. jimmyjack

    jimmyjack 1/2 ton status

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    DUI is at performancedistributors.com

    creepin' and crawlin'

    Jim
     
  11. Gandolf

    Gandolf 1/2 ton status

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    <A target="_blank" HREF=http://performancedistributors.com/>http://performancedistributors.com/</A>

    Shawn, The DUI distributor looks interesting. If you talk to them, let us know your impression. Thanks.


    '89 K5 Silverado..."You can’t have a real adventure, unless the outcome is truly uncertain".
     
  12. jarheadk5

    jarheadk5 1/2 ton status

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    Is the stock GM a ball-bearing distributor? I've heard from a few different people that distributors running on ball-bearings, rather than oilite bushings, have less spark scatter and (obviously) last longer. I'm not sure if spark scatter is a big issue at 5500rpm, or even of any concern in a non-racing motor, but I wanted to throw that in the water and see what the opinions are.

    [​IMG] Semper Maintenance!
     
  13. Eric78K5

    Eric78K5 1/2 ton status

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    Shawn,
    JimmyJack is correct, but I'll check and see if I can find a phone number for you.

    Eric78K5
    K5-Because Size Matters!
     
  14. Burt4x4

    Burt4x4 3/4 ton status

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    Shawn duno if this will work for you application or not but the MSD 8360 is small, the same size as the old points dist. I have one and it's awsome. Just wanted to let you know......

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
    <A target="_blank" HREF=http://www.burt4x4.coloradok5.com>http://www.burt4x4.coloradok5.com</A>
     
  15. AgDieseler

    AgDieseler Certified Scrap Producer Premium Member GMOTM Winner

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    "I had what alcoholics refer to as a moment of clarity."-Jules, Pulp Fiction.

    The solution to all distributor problems: Diesel.

    David
    '85 diesel burban
     
  16. dyeager535

    dyeager535 1 ton status Premium Member

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    The GM ones I have taken apart sure weren't ball bearing, at least the lower bushing. Bushing wore into the shaft, making the shaft garbage. What a pain, even to find the right bushing!!

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  17. Gandolf

    Gandolf 1/2 ton status

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    jarheadk5, sorry but I don't know if they have ball-bearings or bushings. I've never had one apart.

    I saw an add for the D.U.I. distributors (April 2001 Four Wheeler mag pg. 133). There is a disclaimer at the bottom that says: Not Legal for Sale or Use in California on Any Pollution Controlled Motor Vehicle. This is something that must be considered for your state since laws can change.


    '89 K5 Silverado..."You can’t have a real adventure, unless the outcome is truly uncertain".
     
  18. Storm Trooper

    Storm Trooper 1/2 ton status GMOTM Winner

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    Shawn, I don't know if your still looking or not but I thought I would put my 2-cents in anyway.
    No one has mentioned mallory. They carry a full line of performance distributors for most applications. I'm running mallorys Unilite and pro-master coil w/accell 8.8mm wires on my truck. It uses optics instead of points etc. and the pro-master coil is built for off road use. My mouse is rated for a max of 5,800 rpm and the dist. for 6,000. Some guys have told me that when racing off road in dusty conditions that the unilite optics have given them problems but you know that is in the most excessive conditions. The rat will probably never see too high of rpm but in my opinion, the dist. is the heart of your motors performance. Don't get cheap now[​IMG]. There is NOTHING like dumping all that work into a motor and having the dist. float out at 4,500 rpm, IT SUCKS! I know this from my old hot rod days with my 396 back in Detroit.
    Mallory has a complete catalog available on line for download. If you are still looking and can't find it, let me know. You have got my address. Good luck.......
    Dam! I miss my big blocks[​IMG]
    By the way, I have not had a single flutter with the mouse yet but have not pushed it over 5,000 yet. Soon......

    [​IMG]
    [​IMG]<font color=red>Rid'in High In My K5[​IMG]
     
  19. Shawn

    Shawn 1/2 ton status Premium Member Author

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    I really appreciate all the suggestions! To keep my new wiring harness un-cut and have timing control from the Commander computer, I have to get the newer GM style computer controlled distributer and I've only found Accel, MSD, and DUI that carry them. The MSD and DUI units are close to the $300 range while the Accel is $250. I'm a little tapped for cash so I went ahead and ordered the GM unit on GM's Performance site part # 1103952. The distributor for the Ram Jet 350 is right underneath the one I got for $10 more. I figure the only difference between the 2 is the bottom drive gear. Lately, I've been thinking it would be nice to have a distributeless ignition installed. I can't afford it now but maybe next year so the GM distributor might be on only temporary. Another important thing is the availability of parts far from home. Having stock parts is nice to have in case of failure on the trail. Thanks again for the comments.

    Shawn
    87 K5
    few mods[​IMG]
    <A target="_blank" HREF=http://www.off-road.com/chevy>http://www.off-road.com/chevy</A>
     
  20. Emmettology 101

    Emmettology 101 3/4 ton status

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    Hey, Shawn, i sent ya a PM on Dist's.....

    Mike [​IMG]
    See <font color=green>EMMETT</font color=green> -&gt; <A target="_blank" HREF=http://emmett.coloradok5.com>http://emmett.coloradok5.com</A>
     

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