Can I safely dig my 750rwhp T/A through a upgraded 10bolt rear end?
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05-01-2012, 08:53 PM
#23
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bone stock 99-02 zexel torsen diff 2.73 gear rear end in my turbo thirdgen. 690whp on stingy mustang dyno thru unlocked TH400 with 5400-ish stall...way to high for the combo or it was blowin thru, i couldnt tell.
9.72 at 142 on a 1.49 60 foot. Been in the 9's few other times with dozen 10 sec passes ranging from 134-140mph traps. 60's ranging from 1.49-1.7's. Still holding, 2 summers of racing a few times a year and many street pulls.
10 bolts can live
My 3.42 rear lived behind a 400whp 383 then + 150 shot for well over 500whp. MANY 1.50's 60 foots all motor and 1.41 and 1.45 60's with spray. Then into my turbo motor couple passes in the low 10's and bunch of street tuning pulls. Sidestepping it out many times on the highway finally chipped a worm gear tooth...just a tiny chip...but it clanked abit going around turns so I swapped in a 2.73 rear.
My car would easily have done 750+ on a dyno jet. Auto's can live if soft with the converter...no tbrake or heavy hits on boosted launches. T56, you have to be very light...but my buddy's been 10.0's at 136 in a nitrous 406 sbc with a 1.5x launch spraying at 25mph which should be top first gear. T56, spec 3 clutch
9.72 at 142 on a 1.49 60 foot. Been in the 9's few other times with dozen 10 sec passes ranging from 134-140mph traps. 60's ranging from 1.49-1.7's. Still holding, 2 summers of racing a few times a year and many street pulls.
10 bolts can live
My 3.42 rear lived behind a 400whp 383 then + 150 shot for well over 500whp. MANY 1.50's 60 foots all motor and 1.41 and 1.45 60's with spray. Then into my turbo motor couple passes in the low 10's and bunch of street tuning pulls. Sidestepping it out many times on the highway finally chipped a worm gear tooth...just a tiny chip...but it clanked abit going around turns so I swapped in a 2.73 rear.
My car would easily have done 750+ on a dyno jet. Auto's can live if soft with the converter...no tbrake or heavy hits on boosted launches. T56, you have to be very light...but my buddy's been 10.0's at 136 in a nitrous 406 sbc with a 1.5x launch spraying at 25mph which should be top first gear. T56, spec 3 clutch
05-02-2012, 06:08 AM
#24
bone stock 99-02 zexel torsen diff 2.73 gear rear end in my turbo thirdgen. 690whp on stingy mustang dyno thru unlocked TH400 with 5400-ish stall...way to high for the combo or it was blowin thru, i couldnt tell.
9.72 at 142 on a 1.49 60 foot. Been in the 9's few other times with dozen 10 sec passes ranging from 134-140mph traps. 60's ranging from 1.49-1.7's. Still holding, 2 summers of racing a few times a year and many street pulls.
10 bolts can live
My 3.42 rear lived behind a 400whp 383 then + 150 shot for well over 500whp. MANY 1.50's 60 foots all motor and 1.41 and 1.45 60's with spray. Then into my turbo motor couple passes in the low 10's and bunch of street tuning pulls. Sidestepping it out many times on the highway finally chipped a worm gear tooth...just a tiny chip...but it clanked abit going around turns so I swapped in a 2.73 rear.
My car would easily have done 750+ on a dyno jet. Auto's can live if soft with the converter...no tbrake or heavy hits on boosted launches. T56, you have to be very light...but my buddy's been 10.0's at 136 in a nitrous 406 sbc with a 1.5x launch spraying at 25mph which should be top first gear. T56, spec 3 clutch
9.72 at 142 on a 1.49 60 foot. Been in the 9's few other times with dozen 10 sec passes ranging from 134-140mph traps. 60's ranging from 1.49-1.7's. Still holding, 2 summers of racing a few times a year and many street pulls.
10 bolts can live
My 3.42 rear lived behind a 400whp 383 then + 150 shot for well over 500whp. MANY 1.50's 60 foots all motor and 1.41 and 1.45 60's with spray. Then into my turbo motor couple passes in the low 10's and bunch of street tuning pulls. Sidestepping it out many times on the highway finally chipped a worm gear tooth...just a tiny chip...but it clanked abit going around turns so I swapped in a 2.73 rear.
My car would easily have done 750+ on a dyno jet. Auto's can live if soft with the converter...no tbrake or heavy hits on boosted launches. T56, you have to be very light...but my buddy's been 10.0's at 136 in a nitrous 406 sbc with a 1.5x launch spraying at 25mph which should be top first gear. T56, spec 3 clutch
With an M6, it is a waste of money and time to even try. If you have an auto, I have seen them in the 10s.
05-02-2012, 07:37 AM
#25
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I just said I have a newer rear end and been 9's on some quick 60's. Its not an old case.
Now my buddy's rear is a 28 spline 10 bolt, older case ands its lived well into the 10's with a T56 in a 93 firebird.
i wouldnt say its a waste to try, but with the manual you have to be alot softer on the launch
Now my buddy's rear is a 28 spline 10 bolt, older case ands its lived well into the 10's with a T56 in a 93 firebird.
i wouldnt say its a waste to try, but with the manual you have to be alot softer on the launch
05-02-2012, 08:15 AM
#26
I just said I have a newer rear end and been 9's on some quick 60's. Its not an old case.
Now my buddy's rear is a 28 spline 10 bolt, older case ands its lived well into the 10's with a T56 in a 93 firebird.
i wouldnt say its a waste to try, but with the manual you have to be alot softer on the launch
Now my buddy's rear is a 28 spline 10 bolt, older case ands its lived well into the 10's with a T56 in a 93 firebird.
i wouldnt say its a waste to try, but with the manual you have to be alot softer on the launch
I think the torque arm twists these diffs up and screw with the ring and pinion alignment, but that is just my theory. My 12 bolt broke 4 times and never went better than a 10.78@129. I think the same issuse was causing the the 12 bolt to break.
The OP said he wants safe, with 750rwhp, M6 and sticky tires from a dig. Telling him it can be done with a 10 bolt is just leading him into a bucket of wasted money. Since it has been done maybe 1-2% of the time and calling that reliable is good advice? Really? The guy has to ship everything and doubling the costs, not to mention labour, I say do it once.
05-02-2012, 09:49 AM
#27
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Never said it was reliable...just pointing out it could be done and perhaps worth a shot before swapping rears. Everyone says it wont work and it will break..well it isnt always the case if you go softer on the rpms at launch. He isnt leaving at 750whp. I also never said to build the rear...
I should have added keep it bone stock if you want to try it, dont waste money on upgrades. He said by buying new components, is that a safe way? No that is not. I didnt mention it here in this thread but another 10 bolt thread I said leave the rear stock, dont build it.
I should have added keep it bone stock if you want to try it, dont waste money on upgrades. He said by buying new components, is that a safe way? No that is not. I didnt mention it here in this thread but another 10 bolt thread I said leave the rear stock, dont build it.
05-03-2012, 06:21 PM
#31
Edit: what kind of idiot would say for him to try and run his 10-bolt? Why so it can die on him... maybe while shifting hard into 3rd and causing him to wreck?
05-03-2012, 06:42 PM
#33
Given that the previous owner of my car was snapping 10 bolts with just a cammed v6 + spray at the track through an auto transmission, I wouldn't even give a 10 bolt any consideration for a 750HP car, ever.
I think that GM should have given us the 8.5"/8.6" 10 bolt instead of this crappy 7.5" 10 bolt. The larger one actually has some strength to it.
I think that GM should have given us the 8.5"/8.6" 10 bolt instead of this crappy 7.5" 10 bolt. The larger one actually has some strength to it.
05-03-2012, 08:12 PM
#35
if you go moser 12 your wasting money....that thing will start to leak and make noise right away........if on a budget,you can get an s60 with the s trac which is conservitavely rated at 650, however if your running a turbo or supercharger you can probly squeeze an extra hundred out of it since its not as hard as spray or natural hp on a rear and its components.......or just get a locker or spool with it and you will have no issues........if you call carl at central racing parts, his base price is like 2250 i belive (may be lower but dont wanna false advertise) now if you wanna ad TCS it goona cost you a little extra.....and that is a shipped price......his number is 316-299-8427, and his customer service is the best out there.
i just had my 10 bolt built with suspension upgrades to keep from hopping. im nowhere near 750 hp though.
05-03-2012, 09:02 PM
#38
Once I removed the 12 bolt, and since I had MWC ship it assembled, I installed it myself on jack stands in about 2 hours. Removal was similar or a little less time, but in between I swapped brakes and made new brake lines, and that took about 2 hours. Mine also had a Watts link to install. If I had help it would have been quicker. I like to take my time and tinker.
05-04-2012, 01:16 AM
#40
There is a crapload of info about this on here, heck you can purchase 9" axles already made for these cars.
Some 10 bolts are freaks and manage to survive, others break if you just look at them funny. My 10 bolt is one of those freaks which I am just fine with!