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Old 08-18-2010, 06:27 AM   #1
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Default Differences in diffs, spool and one-way?

Could someone explain the differences in diff types as simply as possible? I've heard the differences in how they work but what I'm looking for is a brief explanation of the differences in driving and some thoughts on when and why each type would be used.

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Old 08-18-2010, 07:03 AM   #2
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From Richard Chang's TC cheat sheet

DIFF VS ONE-WAY
DIFF most consistent feel and more off-power steering while sacrificing some on-power steering
ONE-WAY high traction asphalt/carpet with no hairpin turns. Greater off-throttle steering and increased acceleration.
CENTER ONE-WAY increase overall steering off-power
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Old 08-18-2010, 08:20 AM   #3
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It's rare to see anything other than a spool used with rubber tyres now.

If the track is particularly low traction or particularly twisty, you might want to try a front diff to get a bit of smoothness and steering back into the car.

One-ways are pretty rare also. Generally you might want to try one in high grip conditions with sweeping corners.

In terms of driving, diffs give the most natural balance of steering, braking and traction, but because the front is liable to "diff out" on power, you don't get the strong pull out of corners that you feel with a spool.

Spools can give a little understeer in slower corners, but have very positive traction. This can make them edgy at times.

One-ways have a very smooth feel and carry good corner speed until you brake (or even lift off and use the drag brakes), at which point the car becomes very unstable.
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Old 08-18-2010, 09:55 AM   #4
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Thanks to both of you!
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