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Old 08-06-2003, 03:12 PM   #1
Crzykdd
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Default DCCD settings

Anyone leave the DCCD to 65% rear and just drive it that way all the time? Are you able to get a lilttle power on oversteer that way at all? Or have any of the fun that rwd cars normally enjoy...just curious.

thanks

-Jason
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Old 08-06-2003, 05:51 PM   #2
ANZAC_1915
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I assume you mean "fully open".
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Old 08-07-2003, 02:43 AM   #3
Crzykdd
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Quote:
Originally posted by Glenn Wallace
I assume you mean "fully open".
Yea I guess thats it, Im not sure since I dont own an Sti

Given the lack of response I guess not too many people have really fiddled with it yet to give feedback or something....

-Jason
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Old 08-07-2003, 05:29 PM   #4
Zoso
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I think everyone is afraid to answer this question. Do a search on DCCD and read through some of the longer posts and you will see why. The big issue is this:

Does the DCCD adjust the torque split between the front and rear axles, OR is the torque split always 35/65 due to the gearing of the center diff and the DCCD just actually controlls the amount of slip allowed between the front and rear axles.


I don't know for sure, but I will tell you this. When the DCCD is rolled all the way back to the full open, it will behave more like a RWD car due to the open nature of the diff. When it's in AUTO mode you can feel the front wheels have more power, under certain circumstances such as throtle postition, cornering position and the current state of under or oversteer being experinced at the the time.
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Old 08-07-2003, 07:32 PM   #5
kelley nelson
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The effect is more pronounced in the wet. (Suprise.) If you set the diff to open and 'stick your foot in it' in a tight corner the back end will usually let go before the front. It's not like booting a Firebird WS6 mid-corner but it's a noticable difference in the feel.

The less traction available, the more you'll notice.
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Old 08-08-2003, 04:53 AM   #6
Crzykdd
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Id be curious, if eventually, with suspension set-up, alignment, etc, you could take advantage of the DCCD for open track days by getting a little power-on oversteer at the limit.

While I like awd, I've never really been a big fan of the 50/50 split, usually anytime the front wheels get power, a car will push at the limit. (speaking from personal experience here, with many a track day at t-hill and buttonwillow). So I'm curious to see if a 35/65 split would help at all...

-Jason
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Old 08-08-2003, 03:25 PM   #7
dbarnblatt
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Quote:
Originally posted by Zoso
I think everyone is afraid to answer this question. Do a search on DCCD and read through some of the longer posts and you will see why. The big issue is this:

Does the DCCD adjust the torque split between the front and rear axles, OR is the torque split always 35/65 due to the gearing of the center diff and the DCCD just actually controlls the amount of slip allowed between the front and rear axles.


I don't know for sure, but I will tell you this. When the DCCD is rolled all the way back to the full open, it will behave more like a RWD car due to the open nature of the diff. When it's in AUTO mode you can feel the front wheels have more power, under certain circumstances such as throtle postition, cornering position and the current state of under or oversteer being experinced at the the time.
It would take a much more complex system to vary the torque between the front and rear. The DCCD just controls the amount of slip... the torque always stays at 35 FR/65 R. The Porsche 959 had a variable torque system... to be able to use the center dial to adjust the power between the front and rear (slick!) that's what $300,000 will get you in 1985! What cars have it these days?
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Old 08-08-2003, 03:37 PM   #8
Austin
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