whats the point of the DCCD
#2
Originally Posted by Bil
ive tried changing the DCCD on my 2006 sti type uk
i dont see any difference at all on any setting
whats the point of it???
i dont see any difference at all on any setting
whats the point of it???
#5
From what I understand, the DCCD alters the amount of torque available to the front wheels in relation to the rears. In normal driving, you wouldn't expect to notice any difference, but in adverse road conditions and more agressive driving the DCCD allows the driver to change the characteristics of the all-wheel-drive to alter the car's handling and grip. All 4wd cars are inherantly "understeery" and by transfering more torque to the rear wheels you improve turn-in, but obviously in wet/ icey conditions the lack of power going through the front wheels is a disadvantage, so you use different settings for different conditions. It's all in the manual, but if you really can't tell the difference then you're not in the extremes where altering the DCCD will be of benefit.
Either that or the switch is broken.......
p.s. Great advice, Pete.
Either that or the switch is broken.......
p.s. Great advice, Pete.
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Originally Posted by Shark Man
Depedning on which DCCD your on about, when it isturned off (i.e fully open), the car is in fact oversteery.
Open (or all the way back) and the car will understeer as the power is to the rear wheels forcing the nose out more, when locked the car will oversteer, though its not recommended to use lock on the road.
The general point is that it transfers power from the front to the rear and vise versa to improve the turn in of the car in corners, hence giving better stability and less under/over steer.
Is it worth it? try an STi without it fitted (pete wont know this as he has never tried a scoob with it fitted ) and you can tell the difference
Tony
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#9
Originally Posted by TonyBurns
You have it the wrong way round
Open (or all the way back) and the car will understeer as the power is to the rear wheels forcing the nose out more, when locked the car will oversteer, though its not recommended to use lock on the road.
The general point is that it transfers power from the front to the rear and vise versa to improve the turn in of the car in corners, hence giving better stability and less under/over steer.
Is it worth it? try an STi without it fitted (pete wont know this as he has never tried a scoob with it fitted ) and you can tell the difference
Tony
Open (or all the way back) and the car will understeer as the power is to the rear wheels forcing the nose out more, when locked the car will oversteer, though its not recommended to use lock on the road.
The general point is that it transfers power from the front to the rear and vise versa to improve the turn in of the car in corners, hence giving better stability and less under/over steer.
Is it worth it? try an STi without it fitted (pete wont know this as he has never tried a scoob with it fitted ) and you can tell the difference
Tony
Well on my sti ra if the diff is open(wound back,ie green light on)it certainly does not push the nose out....It is tail happy and as i am aware this is oversteer!
Sure your switch aint back to front
#10
'fraid I'm with Bill on this one,doesn't make a blind bit of difference to the way I drive my car.Unless you enjoy the unbearable low speed 'clonking'(and I have owned STi's with and without it)
The only time mine is ever used is when the g/f activates it by mistake,cos thats where the leccy window switch is on her Peugeot
The only time mine is ever used is when the g/f activates it by mistake,cos thats where the leccy window switch is on her Peugeot
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Originally Posted by rooferman
Well on my sti ra if the diff is open(wound back,ie green light on)it certainly does not push the nose out....It is tail happy and as i am aware this is oversteer!
Sure your switch aint back to front
Sure your switch aint back to front
It was the classics that suffered that problem, its not really possible to do it on a new age A-DCCD car as its computer controlled
Tony
PS just to point out what its doing, power to the rear forces the front of the car out as its being "pushed" causing understeer, when the power becomes more even the nose gets more grip as its not being pushed
Last edited by TonyBurns; 26 August 2006 at 01:04 PM.
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I'm with rooferman, with the diff open alot of torque to rear wheels = oversteer and tail losing fun esp in the wet. With it locked, a bit more understeer but doesn't slide out in the wet/snow.
#13
The dccd on my car makes a huge difference to its handling/turn in/and stability in dry,damp,wet conditions.....even with only a slight adjustment of the controller.
I know my car has a helical front diff,maybe this is why the dccd acts differently to other dccd equiped cars?Its certainly handles completely different to my previous uk turbo which suffered from understeer.
I know my car has a helical front diff,maybe this is why the dccd acts differently to other dccd equiped cars?Its certainly handles completely different to my previous uk turbo which suffered from understeer.
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Originally Posted by dn12345
I'm with rooferman, with the diff open alot of torque to rear wheels = oversteer and tail losing fun esp in the wet. With it locked, a bit more understeer but doesn't slide out in the wet/snow.
Either that, or he has very grippy rear tyres and "Road champs" on the front
#17
I notice the difference in my MY05 STi...
More Power to Rear + Empty Roundabout = Ultimate Drifting fun
Set to auto and push the car and you will feel the yaw sensors switch the diff around when the inherent understeer of the Impreza starts to come in.
More Power to Rear + Empty Roundabout = Ultimate Drifting fun
Set to auto and push the car and you will feel the yaw sensors switch the diff around when the inherent understeer of the Impreza starts to come in.
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Originally Posted by Shark Man
Thirded, Mr burns obviously doesn't know what happens when the rear LSD starts taking up the slack under power with a open centre diff that has (iirc) a 60:40(ish) rear biased split ratio
Either that, or he has very grippy rear tyres and "Road champs" on the front
Either that, or he has very grippy rear tyres and "Road champs" on the front
You may have only tried this on the road, ive done it on an airfield, the nose is pushed out with the settings all the way back, plus ive 2 LSD's, front and rear.
The nose pushes out with the power to the rear = understeer.
If you want to see whats left of the front tyres due to the understeer I can arrange pictures if you wish?
Tony
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You sure your not understeering from excessive steering lock/ over-zealours steering input?
Even RWD cars will do that
Less lock...more foot
Yes you have a front LSD, but it's more sloppy than the rear one...otherwise it wouldn't be able to turn, regardless of your DCCD setting
Even RWD cars will do that
Less lock...more foot
Yes you have a front LSD, but it's more sloppy than the rear one...otherwise it wouldn't be able to turn, regardless of your DCCD setting
Last edited by Shark Man; 26 August 2006 at 05:47 PM.
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Originally Posted by Shark Man
You sure your not understeering from excessive steering lock/ over-zealours steering input?
Even RWD cars will do that
Less lock...more foot
Yes you have a front LSD, but it's more sloppy than the rear one...otherwise it wouldn't be able to turn, regardless of your DCCD setting
Even RWD cars will do that
Less lock...more foot
Yes you have a front LSD, but it's more sloppy than the rear one...otherwise it wouldn't be able to turn, regardless of your DCCD setting
Tony
#21
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DCCD??
That will be for the .......
D ozy
C ocks who
C an't
D rive
It sits alongside the CockLink, Water Spray and Change Gear NOW Idiot!!! Beep ..... ie, fooookin useless, only halfwits and chavs need apply!!
Pete
That will be for the .......
D ozy
C ocks who
C an't
D rive
It sits alongside the CockLink, Water Spray and Change Gear NOW Idiot!!! Beep ..... ie, fooookin useless, only halfwits and chavs need apply!!
Pete
#22
Having mine fully open stops the front end from washing away and turn-in much better. Mine IS a MY03, not a classic.
That does exactly what it is supposed to do.... Tony - I suggest you get your diff settings checked!
That does exactly what it is supposed to do.... Tony - I suggest you get your diff settings checked!
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Originally Posted by pslewis
DCCD??
That will be for the .......
D ozy
C ocks who
C an't
D rive
It sits alongside the CockLink, Water Spray and Change Gear NOW Idiot!!! Beep ..... ie, fooookin useless, only halfwits and chavs need apply!!
Pete
That will be for the .......
D ozy
C ocks who
C an't
D rive
It sits alongside the CockLink, Water Spray and Change Gear NOW Idiot!!! Beep ..... ie, fooookin useless, only halfwits and chavs need apply!!
Pete
Tony
#24
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Originally Posted by TonyBurns
Pete, does your car have ABS?
Tony
Tony
B loody
S ensible??????
Yes, it does!
I consider ABS,AirBags and SeatBelts essential safety items ...... I have never, ever, heard anyone say, "I wouldn't have crashed if I had DCCD!!"
If you need DCCD to stop from crashing then you are driving like a *****!! IMHO
Pete
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Originally Posted by webmaster
Having mine fully open stops the front end from washing away and turn-in much better. Mine IS a MY03, not a classic.
That does exactly what it is supposed to do.... Tony - I suggest you get your diff settings checked!
That does exactly what it is supposed to do.... Tony - I suggest you get your diff settings checked!
On the road with the A-DCCD on the car wont understeer, though you do get that instant of oversteer going into a corner then the nose pulls out to keep you on line for the rest of the corner, not nerve racking or anything
But I did drive the car on an airfield (concrete) so it could be that the low grip surface could have had something to do with it?
I know Litchfields do something with the A-DCCD settings on some of the cars they get in? though im not sure what?
Tony
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Originally Posted by pslewis
A bsolutely
B loody
S ensible??????
Yes, it does!
I consider ABS,AirBags and SeatBelts essential safety items ...... I have never, ever, heard anyone say, "I wouldn't have crashed if I had DCCD!!"
If you need DCCD to stop from crashing then you are driving like a *****!! IMHO
Pete
B loody
S ensible??????
Yes, it does!
I consider ABS,AirBags and SeatBelts essential safety items ...... I have never, ever, heard anyone say, "I wouldn't have crashed if I had DCCD!!"
If you need DCCD to stop from crashing then you are driving like a *****!! IMHO
Pete
ABS also what I would call a safety item, you still get people crashing with it due to them taking it for granted.
Go back to the good old days of the mk1 escort pete, no anything on one of those
Tony
#28
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Originally Posted by TonyBurns
Go back to the good old days of the mk1 escort pete, no anything on one of those
Tony
Tony
That means that we can actually drive, and I mean REALLY drive, the kiddies these days need all this wizardry just to stop from planting the car into the landscape!!
Its a pathetic state of affairs ... I believe that not one driver under the age of 30 could drive a car from the 1960s or 1970s!!!
That why I can humiliate an Impreza thats had £1000's spent on it and throwing out 500BHP - because I can actually drive by the seat of my pants not by some CockLink induced dream!!
Pete