Composite dist gears
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Composite dist gears

  1. #1
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    Default Composite dist gears

    You might want to check yours. And maybe throw it as far as you can throw it.








    Brand COMP Cams
    Manufacturer's Part Number 12140
    Part Type Distributor Gears
    Product Line COMP Cams Composite Distributor Gears
    Summit Racing Part Number CCA-12140
    Distributor Gear Material Carbon Ultra-poly
    Drilling Required No
    Roll Pin Included No
    Quantity Sold individually.
    Notes For aftermarket distributor with 0.500" diameter shaft.

    Eliminate spark scatter and excessive wear.
    COMP Cams composite distributor gears are manufactured from Carbon Ultra-Poly composite to ensure superior strength and less wear. They are the latest in hi-tech distributor gears designed around solving the wear issues associated with bronze gears in racing applications. The polymer gears are ideal for street roller applications--they feature virtually no wear, and they eliminate the problem of spark scatter associated with worn bronze gears. The gears have undergone stringent testing in various applications with positive results. Why put up with the hassle of changing bronze gear after bronze gear, when you can switch to composite for extended gear life?
    Last edited by Fiat48; 08-14-2009 at 06:17 PM.

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  3. #2
    I'm No Expert Shaun's Avatar
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    They used composit gears in that little ford v4 i have too, replacement steel ones where made. It seames pretty commen for them to get destroyed in any type of performance app.



  4. #3
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    i have only read bad things about these gears, the melonized ones may not be any better i just found mine chewed up like yours checked it three times before i put in water and it was fine put about 20 miles on it and checked it chewed.
    guess it is bronze flake in the oil from now on. ill put my bronze gear back on my msd dizzy and go.
    dont know about you but my filter bypass is blocked and running a kn filter with non bypass filter im just going to change oil and filter and put it back in the water. how about you?

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  6. #4
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    Back to bronze. Hopefully no motor damage.
    Very possible that a piece of this crap wedged the oil pump and maybe even twisted the oil pump shaft. She will come apart.
    Really pisses me off. This was on a vertex mag deal. Maybe 20 1/4 mile passes.
    Last edited by Fiat48; 08-14-2009 at 06:22 PM.

  7. #5
    RAT PATROL rich s's Avatar
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    Is it possible there is more heat build up with a mag,? putting a heavier
    load on the gear than say a MSD. the composite gear can not take as much?

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    A mag is harder to turn. Vertex is the easier of about any mags out there to turn. We've always had to live with bronze gear wear...the little flakes in the oil we all hate. This gear was supposed to be better. It's not by a long shot. It's twice the price also of a bronze gear.
    I just wanted folks to know in case they were running one. Some folks (like this guy) don't tend to look over the motor very often.
    Actually so far he is lucky. When the gear let go he was at the top end of a run, the motor quit but almost threw him over the deck of the boat.

  9. #7
    Some guy obnoxious001's Avatar
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    Quote Originally Posted by Fiat48 View Post
    A mag is harder to turn. Vertex is the easier of about any mags out there to turn. We've always had to live with bronze gear wear...the little flakes in the oil we all hate. This gear was supposed to be better. It's not by a long shot. It's twice the price also of a bronze gear.
    I just wanted folks to know in case they were running one. Some folks (like this guy) don't tend to look over the motor very often.
    Actually so far he is lucky. When the gear let go he was at the top end of a run, the motor quit but almost threw him over the deck of the boat.
    Thanks for the note, we were considering one of those on an engine that I just put back together,, glad we used the bronze.

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    Why not just spend the extra $40.00 and get the two piece cam core and use a stock gear and be done with it. It has worked for me.

  11. #9
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    Quote Originally Posted by sgdiv7 View Post
    Why not just spend the extra $40.00 and get the two piece cam core and use a stock gear and be done with it. It has worked for me.
    That works out pretty well, but occasionally the cam will twist the dowel pins off. I have seen that a few times.

  12. #10
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    Default Mags

    Yes Mags are harder to turn, but not near as hard as the oil pump on the bottom of that shaft.......Cold, thick oil can be murder on all the dist gears. To those that like 80+ lbs of oil pressure, just realize it is that gear pushing that oil....Ray
    LOUD BOATS SAVE LIVES

  13. #11
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    The gears have undergone stringent testing in various applications with positive results."

    Lets see now....must have tested on dry sump motors only and none that used magneto ignitions. LOL.

  14. #12
    i'm back!! 1QuickCP's Avatar
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    thats why I run external pumps with front drive mags......

    although I have used a steelgear that I heated and softened in a few street motors we did...risky if you dont get the rockwell hardness correct but it worked like a charm...this was tried at the customers request and the first one we did i figured was a "holy crap" moment but supprise it worked great.

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    Appears the rapid wearing gear could hold no longer and just stripped so the motor quit. Blower does not appear to be "banged". Nothing lodged in the oil pump or pickup. No shafts twisted. So it is back together with bronze.
    Lucky.

  16. #14
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    Quote Originally Posted by Fiat48 View Post
    Appears the rapid wearing gear could hold no longer and just stripped so the motor quit. Blower does not appear to be "banged". Nothing lodged in the oil pump or pickup. No shafts twisted. So it is back together with bronze.
    Lucky.
    Real lucky.
    I don't think this gear was ever intended for severe race applications. From what I gather through other conversations, it's somehow made it's way into the racing world, but was intended initially as a street performance deal.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

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