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Old September 13th, 2006, 03:26 PM   #1
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Default 12 Bolt ? ? ?

( I AM THINKING IT IS TIME FOR A 383 )

IF I AM RUNNING A 12 BOLT REAR END WITH A DETROIT LOCKER AND "STOCK AXLES" ON 36"S WHAT IS THE MAX (HP'S) THAT IT WILL BEFORE BOOM

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Old September 14th, 2006, 06:26 AM   #2
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Old September 21st, 2006, 09:35 AM   #3
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I had a 12 bolt boom behind a tired 350 on 35's
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Old September 21st, 2006, 11:25 AM   #4
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about 85 kW.
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Old September 21st, 2006, 11:29 AM   #5
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run it and find out. under a jeep i wouldnt see any problems. and if it does toss a 9.5 14 bolt under it.
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Old September 21st, 2006, 12:54 PM   #6
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It isn't Hp that will break it- it is a combination of torque, weight, traction, tire size and construction, driving style and type of terrain that will cause issues with any rear end.

There is no way to tell just by horsepower, epecially since there aren't too many people running a 12 bolt. I personally would swap in a S/F 14 bolt, but that is just me.
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Old September 21st, 2006, 01:01 PM   #7
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Quote:
Originally Posted by Cooter
It isn't Hp that will break it- it is a combination of torque, weight, traction, tire size and construction, driving style and type of terrain that will cause issues with any rear end.

There is no way to tell just by horsepower, epecially since there aren't too many people running a 12 bolt. I personally would swap in a S/F 14 bolt, but that is just me.
OBVIOUSLY YOU CAN TELL HE IS A HAMMER DOWN KIND OF GUY! I BET THIS THING SEES A MILE OF AIR A DAY AT FULL CAPACITY OF THE FLUX COMPACITER
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Old September 21st, 2006, 01:28 PM   #8
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Quote:
Originally Posted by ScOoTeR
about 85 kW.
No no no, torque busts axles, not power..

please recalculate your answer in netwon meters.
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Old September 21st, 2006, 02:08 PM   #9
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ONCE AGAIN IF I SWITCH TO A 14BOLT I WILL NEED NEW RIMS AND I DONT WANT THAT WHEN WE GO TO SILVER LAKE I CAN PUT MY PADDLES ON THE JEEP WITH A 12BOLTS. AS FOR THE REST OF THE TIME THIS RIG IS A PAVEMENT POUNDER THAT I LOVE TO DO HOLE SHOTS WITH BUT I NEED MORE POWER I GEUSS THE QUESTION IS WHAT WILL A STOCK 1976 K5 CHASSIS TAKE I KNOW I DO NOT WANT THE WEIGH OF A BB UP THERE
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Old September 21st, 2006, 02:46 PM   #10
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Quote:
Originally Posted by Haggar
No no no, torque busts axles, not power..

please recalculate your answer in netwon meters.
HE WANTED POWER!!1!!ONE!!!1

I could give it in Nm, but it also depends on the inverse angle of the shear forces in whatever grade differential fluid used. This is highly dependant on ambient temperature and time of the month (i.e. applied tidal forces)

85kW was as close an answer I was comfortable with.
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Old September 21st, 2006, 03:08 PM   #11
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i think some trucks roled off the assembly line with 454s feading those same axles you'll probly be fine. and yes those were weak for big blocks but they still have a lot of torque over a small block. and theres only one way to tell for sure and thats to go break a couple.

if you get a semi flote 14 bolt from a light duty 3/4 or some z-71s it will be the same bolt patern as yours. but i would break whats in it first
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Old September 21st, 2006, 03:44 PM   #12
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If you don't want to buy new wheels why the hell do you care if it is stong enought? You answered your own question! It don't matter.
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Old September 21st, 2006, 04:06 PM   #13
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Actually, in a rare event, I will say I was wrong on that. Horsepower does bust axleshafts.

Horsepower defines torque at the axles for a given road speed, not engine torque.


:tonka: I've never claimed I know everything. I'll leave that to Skooter/BDR/BioBilly...
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Old September 21st, 2006, 04:24 PM   #14
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Quote:
Originally Posted by 99grandtj
If you don't want to buy new wheels why the hell do you care if it is stong enought? You answered your own question! It don't matter.


NO MY QUESTION IS MORE LIKE. IF I STUFF A 550 HP 383 IN AND BOLT UP MY 6 BOLT PADDLES ON A STOCK 12 BOLT WITH A LOCKER WILL IT GO BOOM????? OR SHOULD I SPRING THE EXTER CASH TO PUT HARDENED AXLES IN WHEN I DO MY MOTOR SWAP

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Old September 21st, 2006, 05:57 PM   #15
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With that kind of horsepower and paddles you are close to the limits of the 12 bolt with aftermarket shafts. Oh I forgot, how about a Ford 9" with custom 6 bolt shafts!

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Old September 21st, 2006, 06:05 PM   #16
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S/F 14 Bolt.

Strong, cheap, factory 6 lug.
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Old September 21st, 2006, 06:11 PM   #17
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Quote:
Originally Posted by Cooter
S/F 14 Bolt.

Strong, cheap, factory 6 lug.
And you should have a detroit locker for one, from boogerboy:tonka:
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Old September 21st, 2006, 06:13 PM   #18
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He sold it :tonka:
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Old September 21st, 2006, 06:48 PM   #19
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Ahh..

550 hp + real paddles (scoops, not desert traks) would = broken axle. If sand is the game, go ford 9" with aftermarket shafts.
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Old September 22nd, 2006, 10:12 PM   #20
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ok thats a little more tracktion and motor than i really thought. i might start thinking who you could trade your 6 lug for 8 lug rims with. i dont personaly think to highly of chevy 1/2 ton axles. out of the big three i think they use the weakest rears.
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