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Go Back   IWSTI.com: Subaru WRX STI Forums > Owners' Lounge > Driving & Motorsports > Driving Tips & Techniques


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Old 04-27-2007, 05:48 AM   #1
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Post Questions about Autocross and Diff DCCD

Does anyone change the DCCD settings when you are autocrossing? And if so why?

p.s. My first autocross is Sunday (4/29) with the CARTCT.com group in Bristol CT.

Thanks,
RedRandy


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Old 04-27-2007, 06:07 AM   #2
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Default Re: Questions about Autocross and Diff DCCD

Im pretty sure auto will be your best bet for an auto-x. Some other here might chime in and say otherwise but I would say leave it in auto.
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Old 04-27-2007, 06:18 AM   #3
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Default Re: Questions about Autocross and Diff DCCD

Leave it in Auto. Especially if this is your first AutoX. By the time you look down, find the roller, move it to where you want and look back you will have blown the braking point or turn-in for the next maneuver. Just let the computer figure things out.
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Old 04-27-2007, 06:22 AM   #4
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Default Re: Questions about Autocross and Diff DCCD

I've tried auto and various manual settings and my best times are with it full open. I have the Cobb adjustable rear sway and the combination of the bar in the middle setting and the dif in full open makes my car very neutral with the option of a little throttle oversteer. This is my first AWD car and I come from RWD domestics so it feels natural to me set up that way. When I had the rear bar on the softest setting the only way I could get the car to rotate was to flick it and give it a throttle stab. Otherwise it it just understeered very badly. I'm not the most experienced by any stretch and someone with better skill and experience with the STI can give more accurate advise but this is what works for this once a month cone killer at this point. YMMV
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Old 04-27-2007, 06:23 AM   #5
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Default Re: Questions about Autocross and Diff DCCD

I'm assuming he meant setting it before starting. Yeah, auto is it. If you get some fun runs at the end of the day you can try fooling around with it. Set it on full lock and work on your mad tyte JDM drift skillz.
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Old 04-27-2007, 06:44 AM   #6
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Default Re: Questions about Autocross and Diff DCCD

Thanks guys, sounds like some good advice.
I think will will leave it at auto and like syrarch04 said, maybe play with it on the fun runs.

RedRandy
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Old 04-28-2007, 05:03 AM   #7
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Default Re: Questions about Autocross and Diff DCCD

Hey Redrandy I'm heading up to bristol on sunday as well, look for another 06 wrb with a borla xr-1 exhaust. I'm psyched, first auto-x of the year!
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Old 05-26-2007, 06:24 AM   #8
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Default Re: Questions about Autocross and Diff DCCD

Just saw this post and had to put my $.02 in... Why would anybody want to use it on anything but Auto?? I mean... Why would anybody want to slide sideways across the finish line? Right Randy?

And In my stock '04 with nothing other than performance alignment, i usually leave it on auto, but every now and then I put the DCCD almost all the way to the rear... But I like a car with alot of ass behind it...
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Old 05-26-2007, 12:57 PM   #9
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Default Re: Questions about Autocross and Diff DCCD

I have been asking this same question,...but for the '04 model year.

In 2005 Subaru added a Yaw sensor and different computer. I'm thinking it mostly opens the center diff in really tight corners.

On my '04,..there is no yaw ensor and the DCCD computer seems to be going nuts. The front and rear seem to lock and unlock in mid corner. The front of the car hops and bangs it's way around the tighter corners. I have been told it looks bad enough from outside the car that the front wheels leave the ground, (and the lot was fairly smooth and the car was at about 20 mph).

For my last run at my first autocross event, I tried it in full open, or maybe it was one notch from full open (still green) and the car was a handfull. The tail was all over the place. I saved the first 3-4 major slides without hitting any cones,..but then I couldn't hang on to it any longer and had to abort.

I experimented in a KMart parking lot the other day and found the 2 middle manual settings seemed to work best. The upper for the 2 middle ones even.

My friend was at the same autocross, and he left his in auto and did really well,....but he has an '06 with the yaw sensor.
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Old 06-05-2007, 03:44 AM   #10
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Default Re: Questions about Autocross and Diff DCCD

Yeah... full open had too much oversteer even with stock suspension. I remember destroying 4-5 cones at ones I was coming out of a corner to a straight and there was a wall of 4-5 cones after the exit and we were supposed to drive by the left side of them. Well, when I tried full open setting, the rear end came out, and when I corrected it, I went straight into the cones It was pretty funny. I still need to claybar my front lip to get rid of the cone marks from that incident


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