Moser 12 bolt power??
08-05-2011, 02:06 PM
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Moser 12 bolt power?? i am looking into getting a moser 12 bolt, i might get a really good deal on it and i was wondering what the max rwhp they can handle safely before they break.
08-05-2011, 02:19 PM
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Max Breaking Power is a relative term. Is the car an Auto or Stick. Street car or Drag car.
The problems with 12 bolts are mostly just noisey gears after several hard launches.
The problems with 12 bolts are mostly just noisey gears after several hard launches.
08-05-2011, 02:53 PM
#4
I would say from expereince, if you are under 475 or so you will be ok, if you are on a slick maybe a little less. It will also depend on the gear and the differential itself. If it is spool it will be stronger. If it is a posi, the Eaton HD will likely be the strongest, not sure if there is a Wavetac or S Trak for the 12 bolt yet.
I have one that held 520rwhp, but it did break 3 times. It also did several 1.4s 60fts. That said it is for sale and I have ordered a MWC 9" since the motor is making over 700 fwhp now.
Good luck!
I have one that held 520rwhp, but it did break 3 times. It also did several 1.4s 60fts. That said it is for sale and I have ordered a MWC 9" since the motor is making over 700 fwhp now.
Good luck!
08-05-2011, 03:48 PM
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I would say from expereince, if you are under 475 or so you will be ok, if you are on a slick maybe a little less. It will also depend on the gear and the differential itself. If it is spool it will be stronger. If it is a posi, the Eaton HD will likely be the strongest, not sure if there is a Wavetac or S Trak for the 12 bolt yet.
I have one that held 520rwhp, but it did break 3 times. It also did several 1.4s 60fts. That said it is for sale and I have ordered a MWC 9" since the motor is making over 700 fwhp now.
Good luck!
I have one that held 520rwhp, but it did break 3 times. It also did several 1.4s 60fts. That said it is for sale and I have ordered a MWC 9" since the motor is making over 700 fwhp now.
Good luck!
thanks a lot! i think it has 33 spline axles im not sure on the diff but it is a 3.73 gear.
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08-06-2011, 02:00 PM
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My car is at 510rwhp/516rwtq. Original Moser 4.11's never broke, but after a track day with some slicks, they whined like crazy. So loud on the freeway, was pretty hard to talk to a passenger. Took em out and they look just fine, all tolerances were good. Dont know what the cause for the noise was. Replaced them with Richmond 4.10's. No problems now, but I havent been back to the 1/4 mile since. I have been to auto X events and beat on it around Road America though, still ok.
08-06-2011, 11:41 PM
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My friend has the Moser with GM gears. NO whine, no break, 9 second car. I have a Moser, richmond gears, howls like there is a full moon out. It howled plenty before I dropped the clutch multiple times at 5k at the track. That was with a full bolt on LT1 that dynoed 276rwhp.
08-09-2011, 07:56 AM
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A 12 bolt will be fine for heads/cam street/strip applications and will be slightly more efficient than a 9". If I were to build an all out car, a 9" might be on the list.
