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Old 2007-06-12, 12:52 PM   #14
sperry
The Doink
 
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Real Name: Scott
Join Date: Nov 2002
Location: Portland, OR
Posts: 20,335
 
Car: '09 OBXT, '02 WRX, '96 Miata
Class: PDX/TT-6
 
The way out is through
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Dean, part of the problem is that the article uses the term "torque split" inconsistently. The "torque split" of the differential is not the same thing as the "torque split" seen at the wheels.

People have this misconception that adjusting the DCCD changes the way the differential splits torque between the wheels, which is patently not the case. The differential cannot send more than its fixed ratios of torque to the wheels. What the clutches can do however, is allow the differential to send power to wheels that have traction.

Think of it this way: if the rear wheels have little traction, the clutch can engage and act as resistance in place of the resistance that should be provided by the ground, allowing the front wheels to see up to their full 35% of the engine's output. The torque distribution in that situation will appear like there's more torque to the front half of the differential, but that's not the case, because the "missing" torque at the rear is actually being gobbled up by the clutch to prevent wheel spin.

The article is a pain to read and understand, but if you've read it 100 times over the last 2 years like I have, it will start to make sense.
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