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#1
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dist. drive gear/shaft
so with my 440... whats the deal with these hardend or bronze drive and regular gears for the dist. to oil pump drive. high volume oil pumps require hardend shafts and all that stuff and roller cams need the bronze and hydraulics dont? what am i looking for on a high volume oil pump hydraulic cam setup? bronze gear or not? wheres a good place to pick up the correct item?
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#2
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#3
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Hardened tip intermediate shaft is a good idea.
Only with billet roller cams do you need a bronze gear. Unless your modifying the oiling system the HV pump is gonna eat up power to the tune of 25hp @ 6000rpm on your average 400-450hp motor. |
#4
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Get the MP hardened tip dist. drive. If you wanna run the hv pump regardless if you need it or not, don't use the stock dist. drive, as it can & eventually will shear the tip off & you will have no oil pressure. Been there & done it. Mancini racing, Summit, Jegs, or your local Chrysler dealer can get the hardened dist. drive. The MP part # is 3571071.
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#5
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If you don't use the hardened tip shaft on a high volume pump it will break within minutes of start up.
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#6
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Thats funny, I have a regular old shaft in my oval track 360, I have 5 full nights on it, and it didnt break off. A hardend tip shaft IS A GOOD IDEA, but your blanket statement is misleading.
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#7
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The "hardened" tip is a misnomer, the stock shaft has a hardened tip too; the performance shaft has a radius where the round shaft transitions to hex while the stock shaft has a sharp cut which is the common failure point.
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#8
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LOL I agree. My regular shaft has been going well for 15 years now.
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#9
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We're all happy for you, Rumble.
May you get another 15 out of it before you need the blue pill. |
#10
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You have been lucky, just wait till the next time. And it's not a blanket statement. It's directions and warnings from Mopar Performance along with experience from two broken shafts many years ago.
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#11
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I don't believe that using the stock dist. drive will necessarily result in instant failure when used with the HV pump, but it will eventually break. I've never broken one when used with the stock pump even @ high rpms, but even @ under 6k rpm it can fail when used with the HV pump. The one I broke happened during low speed in town driving while slowing upon approaching a stop sign. Luckily, my house was on the other side of the intersection so there was no further harm done. I got another stock dist. drive (used), and installed a stock oil pump and never had an oiling related problem even when using the car as a weekend bracket car. Unless you plan on seeing over 6,500 rpm on a regular basis, the stock oil system works just fine on BB Mopars. A good oil pan with baffling, 5-6qt capacity & a windage tray works well in most cases when used with the stock pump in these applications.
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#12
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so one more thing about the drive. I found them on 440 source.com and they have a drive that says is pinned to the shaft, then down the page there is and other one from melling that does not appear to have a pin. any advantage to pins or not? both of those are hardend and are recommended with HV pumps
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#13
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The gear is pressed to the shaft hence the pin to keep it from spinning loose.
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#14
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got it. so pinned is the way to go!
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#15
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For me it is, of corse I'm reving 7000rpm a lot.
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