Bronze/composite dist gears ???
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Bronze/composite dist gears ???

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    i'm back!! 1QuickCP's Avatar
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    Default Bronze/composite dist gears ???

    OK, Gn7 and fiat and the rest...whats your most up to date opinion on the comp dist gear?...I have always run bronze or steel and now have 2 bronze and 1 composite sittin on the bench ready to go in my new motor...hate bronze flakes but ???? wet sump, no mag. Dont like the risk with a steel breakin but lunati has that coated one. Dist mesh is spot on,checked and re checked with prussin blue. added small extra oil hole to spray gear as well. Steel would of course be fantastic but steel flakes..uhg....thanks in advance guys. Ya hold that composite in yer hand and its like...rrrrrrrrrr ummmmm ya

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    Quote Originally Posted by 1QuickCP View Post
    OK, Gn7 and fiat and the rest...whats your most up to date opinion on the comp dist gear?...I have always run bronze or steel and now have 2 bronze and 1 composite sittin on the bench ready to go in my new motor...hate bronze flakes but ???? wet sump, no mag. Dont like the risk with a steel breakin but lunati has that coated one. Dist mesh is spot on,checked and re checked with prussin blue. added small extra oil hole to spray gear as well. Steel would of course be fantastic but steel flakes..uhg....thanks in advance guys. Ya hold that composite in yer hand and its like...rrrrrrrrrr ummmmm ya
    I've heard too many storys about the composites being junk. The Melonite treated gears (I think they're iron, not steel) seem to be holding up. Bronze is what it is.

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    Kinda what im thinkin as well, always used bronze, at least if it shits its not 2 bad.

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    Age old dumb and variable problem.
    One thing sure you don't want the composite on a mag. We tried that (vertex) and it appeared to work at first. Then it broke teeth. Dunno if a guy could get away with it on a
    dist deal but then being wet sump I'd be afraid of it.

    Still using bronze here. Still cutting a .030/.030 slot in the dist base for extra oil.
    Not familiar with the Lunati coated one...will have to see that is.

    My Dart was dry sump so I figured the bronze gear wear would be "better". It wasn't.
    But I was a mag,

    There is some variables somewhere because right now I have a blown alcohol vertex magged 468 back there that has run 5 years and the gear looks new. Yet another blown gas 496 vertex magged deal lasted one race season and was sharp as a knife.

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    Yup, ive seen the same thing, guess it just really depends on the cam bore/dist bore relationship in each block. some last some don't. i was hoping the composite would be a good deal but the wet sump pulls so hard, probably go with bronze then try the composite if bronze wears perfect and check it often.

    Still cant believe in over 30 years doing this that someone has not figured out a long lasting steel alloy/ god knows what metal gear...lol Hell Id like to see a titanium gear, tough and flexes a bit.

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    Yeah...LOL...seems to be a dumb problem. I wanted to use MSD's gears on these mags because they make oversize gears so you can get a better fit on the cam gear....but since MSD is .500 shaft and the Mallory and Vertex mags are like .491 shafts I never could play with that.
    Dry sump that baby...your wallet will hate it but your motor will love it! LOL. There is power there I would not have believed till i did it.

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    If I was running a dry sump and a dizzy, I would run the composite gear in a heartbeat. Wet sump or mag, not for me. Wet and a mag, no f'ing way. I believe the melonite iron gear only works on non 8620 rollers. Crane made a true steel gear for 8620 rollers, but has since stopped making them since the shake up. Don't why they couldn't work. Ford roller motors use a steel gear. But their rollers aren't 8620. We run iron gears on iron cams, don't know why a steel gear couldn't be made to be compatible. Probably cost verses demand. For as often as I have to change one out, even with a wet sump, I just chaulk it up as expense. When a weekend cost me two sets of plugs, and 55 gals of fuel, plus what ever wear and tear, the gear is actually pretty cheap.



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    Thanks guys, yeah im gunna put the good old (lol) bronze gear on it and just change it out every few weekends, like you said gn, when ya burn a drum of C12 or C16 the gear is cheap..

    Probably go dry sump if the gear is a real problem, then a front drive jesel dist and ...ta ta.... NO GEAR !!

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    Quote Originally Posted by 1QuickCP View Post
    Thanks guys, yeah im gunna put the good old (lol) bronze gear on it and just change it out every few weekends, like you said gn, when ya burn a drum of C12 or C16 the gear is cheap..

    Probably go dry sump if the gear is a real problem, then a front drive jesel dist and ...ta ta.... NO GEAR !!
    I think someone told me once, that when they start seeing bronze in their oil, they know it's time for an oil change. I can't remember who said that..some old fart I think.

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    I used to micronite the steel gears in wet sump motors and never had problems.

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    Default not all bronze gears are the same

    hi nickel content is the key ingredient in having the bronze gear last !
    not all brands have enough !
    bought an offset belt drive that came with a bronze gear that failed after a short time ... so I sent that gear and three other brand gears to a lab had them tested . the one that failed was 80% copper 11% zinc 3% lead 5% tin and 1% nickel
    MSD gear was 87.82% copper 1.08% zinc 4.04% iron 0.75% manganese and 5.49% nickel
    ISKY gear 87.41% copper 1.36% zinc 3.95% iron 0.72% manganese and 5.69% nickel
    old gear off an old vertex brand unknown tested... 86.66% copper 1.46% zinc 3.71% iron 0.59% manganese and 6.12% nickel
    MR.GASKET was junk also!
    hope this info will help you ...
    Last edited by Blown to the Bone; 07-25-2010 at 10:13 AM.

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    thanks, cams isky gears MSD....I think if I get a great pattern on it and wear looks good I may try the GM melonized gear and watch it like a hawk for a while to see if it wears or not. Good news is composite gears going back to summit ex change for msd bronze gears...lol

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    Sounds to me like i should be checking my dist gear more often

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