stevegrizzle

Wasn't trying to screw up the thread, just I have heard that the 12 is not recommended for m6's with over 500rwhp. I have no experience in this I am trying to decide what to get myself.....and that is what I was told.

brad8266

iTrader: (23)

The Internet never lies!!!!!

brad8266

iTrader: (23)

The stocker is a hit or miss. Ive ran with over 500Ft-Lbs but not on slicks and I beat the crap out of my car everytime im in it. My stocker is still in good shape after 115K miles. I replace the fluid often though, which is part of the longevity. All it takes is one lauch to break it. The biggest chance of breaking it is if you stay on the gas during wheel hop and all a sudden the tire grips, thats when it will surely break.

stevegrizzle

I have put over 500 ft lbs on the stocker too, but not ever dead hooked a hard launch. The stock clutch I think is what is saving me, that and no wheel hop.

Paint_It_Black

iTrader: (1)

I think you need a math lesson. 20 success stories out of 21 is far from 99.9%

And where do you get your stats from? If you're going to post up numbers they should be backed up. Did you know 73% of all statistics are made up on the spot?

Lots of M6 guys have gone to a 9 inch b/c they break the 12 bolts sidestepping the clutch at 7K on slicks. Ask the guys from Cartek about their experience with Kerminator.

davered00ss

iTrader: (4)

No definite answer. You're taking a chance any time you race. Mine is still going strong. Nitto 555r Extreem drags (275's) 4.10's 432rwhp/403rwtq.

Phynix

iTrader: (3)

broke my stock with stock power and stock tires, they are all different, maybe you will be one of the lucky ones. and i have seen a 1300rwhp camaro destroy a 9inch, & has been running a 12 bolt for the last 2 years, which is 16 months longer than the 9 inch lasted for him. not that i believe that the 12 bolt is stronger, but there are different situations that support both sides

02 Camaro SS

iTrader: (4)

If you don't have the money for the 12bolt then I wouldn't even put DRs on a stock car. The people who beat on the stock rear with 400+rwhp and get away with it are the lucky ones and certainly not the norm. If you can't afford to replace the rear you don't have to worry about the massive headache you'll have if the stocker blows.

CALL911

iTrader: (17)

Come on guys, start another thread on this if you want to discuss it. It is not what I started this one for.

Well FWIW, a buddy of mine was nice enough to loan me his Mickey Thompson DR's for the track. And I beat the living snot out of my car on them, and just as I have had experience in the past, and seen other friends, I had no issues. The stock rear is holding just fine. Now, again, perhaps I am one of the lucky ones, and I am not going to make it an every week ordeal with DR's, but mine held up fine. (did at least 8+ runs)

allbaugh_04

iTrader: (6)

i'm pretty sure gear swaps have nothing to do with making your rear end weaker.

Ryans_pewter_ss

iTrader: (9)

car made 558hp, 668tq, m6, stock 10 bolt with mt et streets, stock suspension, 1.61 60 ft. 7.07 at 98 mph. in 1/8th. prob. gonna break it soon when I finish the iron block!!!

blackz6sp

iTrader: (11)

Again Call911 has experience with 12bolts w/high HP sidestepping with slicks. But thats not the discussion in this thread so again

dailydriver

Same here!!

In fact, some accuse me of being excessively maniacal in how often I change out the gear oil!
But it's worth it if it helps the longevity even a little.

LS1Formulation

iTrader: (13)

Something interesting I found with my car... I kept killing gearsets running a 4.10 ratio, so I went to a 3.90 gear and haven't broke one since. The pinion on a 3.90 is substantially larger in diameter than a 4.10 and I think the additional contact surface helps spread the shock load on launch. That being said, I have destroyed my rear 4 times at the track with a 3500 RPM launch and Nittos (with 4.10's).

CALL911

iTrader: (17)

Actually they do. 4.10's will not hold in a stock rear as well as the stock 3.42's will.

96autoformula

There are different levels of 12 bolt packages out there, just as there are with the 9". So a basic 12 that advertises holding up to 500 or so RWHP won't hold up to 1,000...common sense. However, one that is stronger and advertises that it will hold that 1,000 will probably live forever. Hence the talk about people snapping their 12 bolts. That is simple math.
Second, slip the clutch on the launch and you should be fine. With the power you're making you can make up for a messy bogging launch with top end power and still have a good chance of dipping it into the 11's if everything else goes as planned.
Just my .02

96autoformula

Oh, and 911 has a point. But it has more to do with the amount of stress the gearset is going through for the speed of the rotation of the gear, shearing forces....yadda yadda. Something moving faster in a circle will experience more stress due to centripital force among other things (rotational torque) as the speed of the turning increases. 4.10 is a steeper gear than 3.42 so it is turning faster...hence more rotation torque experienced in the gears.

allbaugh_04

iTrader: (6)

i was told by someone way more experienced than myself that the the lower the gear ratio the harder it is on the rear. just what i was told.

its like riding a 10 speed and have it in the 10th gear all the time.

NSSANE02

iTrader: (14)

I beat the hell out of mine countless times, ran several low 12/high 11 sec passes with 1.7/1.8 60's on ET streets (feathering of course)... then I broke it one day taking off from a 45 roll on the highway. It could break on the first sticky track pass or it could last a couple years...but there is no doubt that one day it WILL break, good tires just speed up the process. I've seen several fbodys with under 400rwhp and not so great tires break their 10 bolt, one of them was on crappy street tires and only had exhaust.

CALL911

iTrader: (17)

Allright fellas, I am going to politely ask this one more time. IF YOU WANT TO DISCUSS WHAT IT TAKES TO BREAK A 12 BOLT, START ANOTHER THREAD AND DO IT ELSEWHERE!!!!

I started this thread for info on the STOCK rear holding. Lets keep it to that!