Problems.. school me on 4WD and DCCD
29 November 2015, 01:14 PM
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Problems.. school me on 4WD and DCCD
Hi Everyone,
I am getting a bit exasperated with my car just at the moment. I has it mapped and as I have noted before I have done just over 1000 miles on it. The problem I am finding now is that I am wheelspinning everywhere, even on bone dry roads.
To put it into perspective if I give it anything but the slightlest tickle and ride the clutch slightly it wheelspins. It has trashed a set of Pirelli's already. This happens on limp home mode as well. I am having the switch selector replaced on Monday so we will be back on turbo again which will add to the issues no doubt.
Prior to the map it never wheelspun, it was press and go. I realise that torque has increased etc but it has made the car very uncomfortable to drive.
I realise that there is only a little patch of rubber in contact with the road etc and the reason for a wheelspin is that it fails to get traction on the road surface. DCCD (If I understand it correctly) makes a user changable bias. I have a WRX so my diff cannot change the bias to the wheel) you can vary how the 4WD places the power down across the four wheels.
Very unhappy with the map as it has essentially made the car undrivable in any pleasurable sense. I am going to ring up and ask them to just put the stock map back on and accept I have lost 500 quid on the map. The car stalls much much easier.
It is understandable that introducing a new map will affect other aspects of the drive but I think the drive is compromised too far.
What are peoples thoughts on this or am I missing something?
Regards
Stuart
I am getting a bit exasperated with my car just at the moment. I has it mapped and as I have noted before I have done just over 1000 miles on it. The problem I am finding now is that I am wheelspinning everywhere, even on bone dry roads.
To put it into perspective if I give it anything but the slightlest tickle and ride the clutch slightly it wheelspins. It has trashed a set of Pirelli's already. This happens on limp home mode as well. I am having the switch selector replaced on Monday so we will be back on turbo again which will add to the issues no doubt.
Prior to the map it never wheelspun, it was press and go. I realise that torque has increased etc but it has made the car very uncomfortable to drive.
I realise that there is only a little patch of rubber in contact with the road etc and the reason for a wheelspin is that it fails to get traction on the road surface. DCCD (If I understand it correctly) makes a user changable bias. I have a WRX so my diff cannot change the bias to the wheel) you can vary how the 4WD places the power down across the four wheels.
Very unhappy with the map as it has essentially made the car undrivable in any pleasurable sense. I am going to ring up and ask them to just put the stock map back on and accept I have lost 500 quid on the map. The car stalls much much easier.
It is understandable that introducing a new map will affect other aspects of the drive but I think the drive is compromised too far.
What are peoples thoughts on this or am I missing something?
Regards
Stuart
Last edited by StueyBII; 29 November 2015 at 01:15 PM.
29 November 2015, 02:13 PM
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29 November 2015, 08:35 PM
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Well on the positive side it means its the clutch and not the map 
They can damn well fix the clutch. I am taking the car to the local garage tomorrow to get it checked out.
They can damn well fix the clutch. I am taking the car to the local garage tomorrow to get it checked out.
02 December 2015, 06:28 PM
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What pirelli tyres do you have fitted and what presure are they at?
I've never experienced wheel spin in the dry on any dccd setting and mines running 442ftlbs
I've never experienced wheel spin in the dry on any dccd setting and mines running 442ftlbs
Last edited by InTurbo; 02 December 2015 at 06:30 PM.
04 December 2015, 06:56 PM
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So to update you I took it to the garage. I had them check the tyre pressure all round as well as per door guide (ifyswim) They drove it and found no clutch issue. To be fair to the guy driving he was a very careful chap and it was a bit like driving Ms Daisy 
Doing a bit more investigation.. Wheelspin kicks in at 1100 RPM in first. Let me put it into context, I got overtaken by a Yaris whilst trying to start without wheelspinning
Doing a bit more investigation.. Wheelspin kicks in at 1100 RPM in first. Let me put it into context, I got overtaken by a Yaris whilst trying to start without wheelspinning
04 December 2015, 07:27 PM
#21
As said before there is defo somethig wrong either that or you have the worlds worst set of tyres, im running close to 500bhp with dccd and in the dry im lucky if i get a miniscule amount of wheelspin(pulling away hard from standstill) unless i launched it with the diff open.
At 270bhp with nearly 50/50 split and its struggling for grip tell me that something aint right.
At 270bhp with nearly 50/50 split and its struggling for grip tell me that something aint right.
Last edited by **jay**; 04 December 2015 at 07:29 PM.
04 December 2015, 07:37 PM
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The best way I can describe it is that if I want to avoid wheelspin I have to very slowly blend the clutch and press the accelerator so there is no "jump on, jump off" the clutch if that's what you mean.
04 December 2015, 07:40 PM
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It was serviced by API and the mapping was done by Thwaites Developments if I recall correctly (API send out for the mapping service I found out after the fact)