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Old 12-04-2005, 01:58 PM   #1
Onedwn5up
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Default How to use the DCCD -When/Why/What settings?

I read the manual about the dccd but thought I would just ask here about what kind of surfaces, terrains and settings you used the dccd on.

I just want to make sure I am also understanding the application correctly. Someone please correct me if I am wrong.

AUTO -automatically transmits power between the wheels that grip and slip
LOCK -just this, locks all 4 wheels like off-road vehicles for equal power distribution at all 4 wheels regardless of surface/conditions.
From there on down -reduces power distribution to front wheels towards back.

For gravel, dirt, snow, ice, it would make sense to use the LOCK.

For something like Auto X or just track driving is it better to put it all the way towards the rear or leave it on AUTO?

What is the maximum power distribution to the rear wheels using the dccd all the way back?

It's a need feature and I just want to make sure I am understanding its use correctly.

I also did do a search but had difficulty finding info on this particular question.

Thanks!
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Old 12-04-2005, 02:02 PM   #2
WR^2X
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Old 12-04-2005, 04:18 PM   #3
2fas4u
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Even for autocross you should leave it in Auto... Running the DCCD on paved dry roads in other than auto is not good for it.
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Old 12-04-2005, 04:46 PM   #4
Onedwn5up
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Thanks, lots of useful info here. I want to read that guys article on DCCD. It seems pretty in depth and interesting after skimming it over. He says that it is a 3 part paper. Do you know if he produced parts 2 & 3 yet?

Thanks again.

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Old 12-04-2005, 04:52 PM   #5
Onedwn5up
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I can't set as of yet if I agree or disagree with this statement. I have only been able to skim over a lot of the amterial surrounding the dccd.

However, I am thinking it would be avantageous in autox to change the slip ratio towards the rear. Meaning that you would set it all the back from lock with 35% running up front and 65% at the rear. Reason for being that it won't crab or bite hard from the front wheels during sharp turning coupled with hard acceleration. You would also be less likely to get tourque-steer from front while aiming towards the next cone/marker.

Again, this is only me being speculative. I have not read enough on it yet to give a fully informed opinion on that. But thank you for your input.

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Originally Posted by 2fas4u
Even for autocross you should leave it in Auto... Running the DCCD on paved dry roads in other than auto is not good for it.
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Old 12-04-2005, 09:53 PM   #6
FuJi K
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Everyone drives differently and will have a differently setting than someone else. Some situations a setting is better than another. You really have to drive the car and know how the car handles before you start tuning the setting in for your style of driving. Some like it RWDish, some like the comfort of the AWD security; applying some LSD effect or setting on AUTO.

Normally you'd want some LSD effect on tight autocross courses thus leaving the setting to auto. Now I'm not sure how much LSD effect INITIALLY the DCCD system gives but you can try that out while doing a 360* turn to see if it's working or not initally.

Remember that the center diff is a planetary gear-type differential so even if it is set to full rear, you're still AWD just that the rear will most likely slip first because of the planetary gears in the center diff.

Here's what I wrote just a few days ago. (It's to my best understanding, FWIW)
http://www.rs25.com/forums/showpost....3&postcount=22
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