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Just saw this on the Samba-

 

 

Peloquin irs differential

"older Intermeccanica Speedster (still under wraps in the garage) a pic wouldn't show much,what with all the junk piled on it..."



On a lifelong mission (much to my wife's dismay) to prove that immaturity is forever!



"Adding power makes you faster on the straights. Subtracting weight makes you faster everywhere."- Colin Chapman

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  • Peloquin irs differential
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A Torsen/torsional/ATB/torque-biasing differential uses a set of gears inside the diff to create a torque multiplication effect from the wheel with the least grip to the wheel with the most grip.

 

For example, with one wheel on ice and one wheel on pavement, a standard open diff is just going to spin the wheel on the ice while the other wheel doesn't move at all so the car just sits there. With an ATB diff, the limited grip the wheel on the ice has is multiplied and fed to the wheel on the pavement. This allows the wheel on the pavement to still move the car forward. However, because this is a multiplicative effect, if the one wheel actually has zero grip, such as lifting off the ground in a corner, then the other wheel gets zero driving force just like an open diff.

 

This is different than a limited-slip diff which uses a clutch pack to provide a friction coupling between the input and output and between each wheel. This type can still provide a driving force to one wheel even if the other is off the ground. This type can also be adjusted relatively simply to change the handling of the vehicle.

 

Basically, they provide better traction. Some people don't like them due to the handling changes compared to an open diff.

Last edited by justinh
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