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Poor mans locker, using the break.

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Old 03-13-2013, 10:44 PM
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Originally Posted by cruiser54
It's still sending 50% of the TORQUE to each driveshaft, regardless of traction.
Have you read post 10? If there's not torque split 50% of zero is zero.
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Old 03-13-2013, 10:44 PM
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Originally Posted by No4x4Yet
Have you read post 10? If there's not torque split 50% of zero is zero.
if you're spinning your tires you still have torque..
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Old 03-13-2013, 10:45 PM
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Originally Posted by No4x4Yet
Your totally missing the point. The whole issue is that the power isn't transmitted to the wheel with th least grip. The engine doesn't create enough power to spin the stuck wheel. Pressing the break stops the spinning tire and demands more torque. Enough break and you get enough torque to spin the wheel with grip and you move.
You say you are an engineer, think about what you are saying. Why would the tire with less grip before you push on the brake not have less grip after you push on the brake provided that it has the same braking force. The engine providing more torque to spin the wheels has nothing to do with traction. You said that there is no power to the wheel with no traction. There is no more power to the tire ground contact surface after pushing on the brakes either. That engine torque is counteracted by a torque or moment applied to the brake rotors. And how on earth would a rear locker affect the front.
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Old 03-13-2013, 10:46 PM
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Originally Posted by No4x4Yet
You guys are killin me. What I'm wondering is will a locker in the rear increase the torque to front wheels?
no
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Old 03-13-2013, 10:46 PM
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Originally Posted by arorton
if you're spinning your tires you still have torque..
Correct. There's torque and traction. 2 separate things. It's whether the torque is applied to the ground via traction.
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Old 03-13-2013, 10:48 PM
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Originally Posted by cruiser54
Correct. There's torque and traction. 2 separate things. It's whether the torque is applied to the ground via traction.
clearly this guy is not an automotive engineer... lol i'm only in my freshman year as an automotive engineer and i could figure this one out...
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Old 03-13-2013, 10:50 PM
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Originally Posted by No4x4Yet
Have you read post 10? If there's not torque split 50% of zero is zero.
You are confused. The engine produces torque. The torque produced by the engine goes through the transmission and through the transfer case. 50% goes to the front, 50 to the rear. The amount of torque that the ground exerts back on the tire (to move the vehicle forward) has no affect on how much torque the engine produces
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Old 03-13-2013, 10:50 PM
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Originally Posted by arorton
clearly this guy is not an automotive engineer... lol i'm only in my freshman year as an automotive engineer and i could figure this one out...

I'm thinking.....
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Old 03-13-2013, 10:51 PM
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Originally Posted by wpwarren
You are confused. The engine produces torque. The torque produced by the engine goes through the transmission and through the transfer case. 50% goes to the front, 50 to the rear. The amount of torque that the ground exerts back on the tire (to move the vehicle forward) has no affect on how much torque the engine produces

Well put.
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Old 03-13-2013, 10:52 PM
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Originally Posted by wpwarren
You are confused. The engine produces torque. The torque produced by the engine goes through the transmission and through the transfer case. 50% goes to the front, 50 to the rear. The amount of torque that the ground exerts back on the tire (to move the vehicle forward) has no affect on how much torque the engine produces
This is the best way to think of it... Use Newton's laws of motion..

This is the optimized wording of Newton's 3rd law for this particular situation...
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Old 03-13-2013, 10:54 PM
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Originally Posted by cruiser54
Well put.
I am only an engineering student, but I have spun a lot of tires in my life. I think I have it figured out.
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Old 03-13-2013, 10:55 PM
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Originally Posted by arorton
This is the best way to think of it... Use Newton's laws of motion..

This is the optimized wording of Newton's 3rd law for this particular situation...
What did Newton know? Wasn't he the guy that shot the apple off of another guy's head with an arrow? LOL.
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Old 03-13-2013, 10:57 PM
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Originally Posted by wpwarren
I am only an engineering student, but I have spun a lot of tires in my life. I think I have it figured out.
Sometimes, alot of times, real world experience trumps book learning. A combination of both, now that's golden.
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Old 03-13-2013, 10:59 PM
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Thumbs up great thread

Hey xj's. I was just searching on youtube ,for how to control the slip without lockers. They say to apply your breaks at the same time as u throttle up. So with that said. My thoughts would be to use the ebrake to control the slip in the rear. I think the ebrake only controls the rear. ?? Im going to read all your comments again to get a better understanding of what your saying. Thanks for the info
OC California.
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Old 03-13-2013, 11:00 PM
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Originally Posted by cruiser54
Sometimes, alot of times, real world experience trumps book learning. A combination of both, now that's golden.
I figure that I have broken enough things, now it is time to figure out how to make things that break less often and work better and are actually serviceable!
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