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Old 12-05-2008, 10:37 PM   #1
LSU08STI
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Join Date: Nov 2008
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2008 STI
Perrin Stage 2

Default Newb to AWD. Good VDC and DCCD settings?

What is every ones preferences? I don't need to know how to actually set them up. I learned how to set them up using this link:

http://www.driveperformance.subaru.c.../blueprint.asp

How do you drive your vehicle? VDC or no VDC? Manual or Auto DCCD? If you use manual, what do you set it on and for what reason? There is also the +auto setting and the -auto setting.

I only have around 800 miles on my 08 STI. I have been driving under the break in model per the manual for the most part. I have gone over 4000 RPM a few times . Should I even be messing with this stuff under the 1000 mile break in point?
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Old 12-05-2008, 10:40 PM   #2
Spootypuff
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just leave the dccd on auto
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Old 12-05-2008, 10:43 PM   #3
geddesk2
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not really...and not following the manual for the break in is a poor choice, especially with the poor tune from the factory.

I keep my dccd in auto. If you take the time to read the manual it actually tells you when to use what kind of settings.

The owners manual for these cars have tons of great info.
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Old 12-05-2008, 11:26 PM   #4
wrx4lunch
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i only turn off vdc in rain, when it does rain here in cali..
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Old 12-05-2008, 11:29 PM   #5
LSU08STI
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I actually read the owners manual for these settings and found it way more confusing than the link I posted above. I am 31 years old and have a college degree and still found the owners manual description of these features confusing.

I tried to go by the rules of the owners manual for the most part. Especially on the break in period. I usually drive to work in the "I" mode and shift way before 4000 RPM. I am being honest when I say that I have drove the vehicle in sports sharp and gone over 4000 RPM a few times. If driving it over 4000 RPMs screwed up the vehicle then I should of not purchased the car. I purchased the last 08 STI my dealership had in stock. It had around 180 miles on the odometer when I purchased it. It was test driven a few times and I have no doubt that people went beyond 4000 RPM on the test drive. I know that I went over 4000 RPMs on the test drive. If that damages the vehicle, I am in for a lot of trouble in the future.

So far the car drives great. I have not noticed any problems from the date I purchased the vehicle until now. I did buy the extended warranty when I purchased the vehicle. I know some people say it is a rip off but I have never owned a turbo vehicle and wanted coverage for 6 years and 75,000 miles regardless of the problem. I do not intend on modding this vehicle. I am happy with the vehicle in its stock form.

Last edited by LSU08STI; 12-05-2008 at 11:37 PM.
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Old 12-05-2008, 11:50 PM   #6
chanke4252
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The overwhelming vast majority of the time the only reason to turn the VDC off is if TCS is causing problems and unsettling the car during spirited driving. Even with it on the VDC system is really slow to react and it lets the car yaw around quite a bit before it does anything. I assume this is due primarily to the fact that subaru isn't exactly on the bleeding edge, but regardless the reason, it basically means you should be able to leave it on without a problem during all but extremely hard driving situations. That's my experience at least.

As far as the DCCD, I'd leave it in auto, unless you want to make the car a little more tail-happy in which case the rearmost setting would be appropriate. This opinion is based on pretty limited experience with the DCCD though.
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Old 12-06-2008, 12:06 AM   #7
bjwk89
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I am pretty sure it was a post by unabomber I searched for when I had the same question, "The car's computer is smarter than you, leave the dccd on auto". There is a complex graph explaining how the dccd works during a turn and it shows that it knows the right settings to use. Messing with it would not benefit 99% of people with STi's.
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Old 12-06-2008, 02:25 AM   #8
Defiant Autospeed
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Its true. 99% of drivers in 99% of situations (and this includes professional drivers in race situations) will be faster with the DCCD set in auto.

And that statement was made by..

You guessed it. Professional drivers (I dont recall who exactly, but it was a group of several of them that drove I want to say it was an 05 STI...)
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Old 12-06-2008, 02:27 AM   #9
Defiant Autospeed
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And here is how I have broken in every single new car I have ever owned.


And not once, EVER have I had a problem with oil consumption, or excessive wear. Blackstone labs tests that proved it too. Compression and leakdown tests done, PERFECTLY sealed engines. Better than normal results in fact.

The ONE important thing for break in is getting the first oil change within the first 100-200 miles. That oil will have the most carbon and such in it that the car will ever see.
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