Views upon ECU remapping and brabus chip

[jubhi]

Yikes, I would just save that money, your car will loosen up and get faster with time anyway

Yes I was thinking the same thing, would never get that money back on re-sale either. I didn't realise it was that expensive, thought it was in the region of £1500.

 

[st4]

Yes I was thinking the same thing, would never get that money back on re-sale either. I didn't realise it was that expensive, thought it was in the region of £1500.

Still too dear when £500 gets you a remap which will achieve the same result, more power.

 

[Retired]

Inchcape want £1818 incl tax for the D6 (iii) part which is what the Brabus site says you need.

The Brabus site says it takes half an hour to fit. So call it £1900 tops.

Not exactly cheap but less than £2300.

When I was looking some while ago it seemed quite possible to negotiate a pretty good discount. Can't remember numbers.

The BB upgrade means you keep full warranty up to 60k miles.

 

[hawk20]

"As a guide, when cruising with light throttle the lock-up clutch will be fully engaged, so no slip at all. When stationary and at idle the clutch is fully open. Everything in between will depend on the variables listed above."

So said the Mb technical guy. Not a quote from me.

 

[davidsl500]

Not wishing to open up the "when is it locked up" debate again but having read Hawks MB Tech quote my interpretation is that whilst cruising above certain speeds it is, but when you accelerate it comes out of lock up. Thus if you blip the accelerator at speed then the revs will rise as the clutch unlocks immediately as a change in state is detected. Thus blipping the throttle cannot be used as a method for determining lock up state.

 

[hawk20]

Not wishing to open up the "when is it locked up" debate again but having read Hawks MB Tech quote my interpretation is that whilst cruising above certain speeds it is, but when you accelerate it comes out of lock up. Thus if you blip the accelerator at speed then the revs will rise as the clutch unlocks immediately as a change in state is detected. Thus blipping the throttle cannot be used as a method for determining lock up state.

I think that is exactly right.

What I've noticed on mine is that , on a level stretch of motorway, if you accelerate very gently indeed the speed goes up directly in proportion to the extra revs. That suggests little or no slip.

What is great about electronic lock-up is just how close to manual fuel economy and performance auto boxes can get nowadays. The eight speed box on the new 5 series claims the same mpg as the manual version. Maybe with enough gears and modern lock-up technology we can have our auto cake and eat it -with no penalty in fuel and VED bills?

 

[television]

I think that is exactly right.

It is not right as in the info I put up it says it does not lock up completely at all

 

[st4]

....................:

 

[television]

Not wishing to open up the "when is it locked up" debate again but having read Hawks MB Tech quote my interpretation is that whilst cruising above certain speeds it is, but when you accelerate it comes out of lock up. Thus if you blip the accelerator at speed then the revs will rise as the clutch unlocks immediately as a change in state is detected. Thus blipping the throttle cannot be used as a method for determining lock up state.

This blipping is not really blipping David, the amount of throttle change is too small to do that,,and you would feel something,, just the slightest pressure on the throttle is all that is needed

 

[jubhi]

Inchcape want £1818 incl tax for the D6 (iii) part which is what the Brabus site says you need.

The Brabus site says it takes half an hour to fit. So call it £1900 tops.

Not exactly cheap but less than £2300.

When I was looking some while ago it seemed quite possible to negotiate a pretty good discount. Can't remember numbers.

The BB upgrade means you keep full warranty up to 60k miles.

Interesting, thanks I will shop around then.

Yes it is because it keeps the warranty that I will be willing to spend up to £1500 maybe a little more but £2300 seems a joke..

 

[hawk20]

This is what I have always been saying every time

This is what you said when I first posted the MB tech guys comments. see post 121

 

[television]

This is what you said when I first posted the MB tech guys comments. see post 173

I should have removed part of your quote on that post,, the truth is it never locks up completely at all

 

[whitenemesis]

This blipping is not really blipping David, the amount of throttle change is too small to do that,,and you would feel something,, just the slightest pressure on the throttle is all that is needed

The electronics will detect the slightest movement. The info you posted was for the new (at the time) 7 speed box and it says the torque converter is similar to some of the earlier 5 speed boxes. Thus implying not all the 5 speed boxes are the same. It does say the lock-up torque converter is never fully locked up but keeping in mind the potential differences one cannot assume all boxes operate the same way?

 

[hawk20]

I should have removed part of your quote on that post,, the truth is it never locks up completely at all

This is from your quote about the seven speed box: -
"The seven-speed automatic transmission also features a torque converter lockup clutch. This is located in the hydrodynamic torque converter and largely eliminates slip between the impeller and the turbine wheel in many operating situations. "

 

[television]

The electronics will detect the slightest movement. The info you posted was for the new (at the time) 7 speed box and it says the torque converter is similar to some of the earlier 5 speed boxes. Thus implying not all the 5 speed boxes are the same. It does say the lock-up torque converter is never fully locked up but keeping in mind the potential differences one cannot assume all boxes operate the same way?

What electrics come into play here,,I am confused

 

[hawk20]

The electronics will detect the slightest movement. The info you posted was for the new (at the time) 7 speed box and it says the torque converter is similar to some of the earlier 5 speed boxes. Thus implying not all the 5 speed boxes are the same. It does say the lock-up torque converter is never fully locked up but keeping in mind the potential differences one cannot assume all boxes operate the same way?

Yes and it seems the lock up releases -imperceptibly- when we accelerate or other conditions change. It is just a smooth process from no lock-up, to partial lock-up, to full engagment of the lock -up clutch.

Or as the MB guy said: -
"The component you are refering to is called the torque convertor lock-up clutch and is housed within the torque convertor. This is controled by a electrohydraulic valve (torque convertor lock-up solenoid valve) in the valve body which is in the sump of the gearbox. This valve is controlled by the gearbox control unit. The point at which the gearbox control unit actuates the lock-up function depends on a number of things, engine load, engine rpm, road speed, throttle position. Because all of these influence the lock-up clutch behavior I can't give you specifics as to the speed or engine rpm at which the clutch changes from an Open State, to Slipping, to Fully engaged. It's a constantly varying process."

 

[television]

This is from your quote about the seven speed box: -
"The seven-speed automatic transmission also features a torque converter lockup clutch. This is located in the hydrodynamic torque converter and largely eliminates slip between the impeller and the turbine wheel in many operating situations. "

But it still says that it never locks up completely, momentary yes but all the time no

 

[television]

Hawk please read this link
http://www.mercedestechstore.com/pdfs/286_722.9/286 HO 722.9 062504.pdf

 

[davidsl500]

This blipping is not really blipping David, the amount of throttle change is too small to do that,,and you would feel something,, just the slightest pressure on the throttle is all that is needed

We will have to agree to disagree on that then Malcolm. Even a gnats whisker of an increase in throttle position must have an effect in changing the vehicle state otherwise nothing would happen at all! - otherwise there would be no point to the countless number of calculations per second being carried out by modern electronics! As the lock up - and consequently, the de-lock up is progressive, very light acceleration would mean a small proportion of slip and thus the speed picks up in proportion to the revs - a la Hawk's experience.

 

[television]

We will have to agree to disagree on that then Malcolm. Even a gnats whisker of an increase in throttle position must have an effect in changing the vehicle state otherwise nothing would happen at all! - otherwise there would be no point to the countless number of calculations per second being carried out by modern electronics! As the lock up - and consequently, the de-lock up is progressive, very light acceleration would mean a small proportion of slip and thus the speed picks up in proportion to the revs - a la Hawk's experience.

Thats OK by me,,but there are no electrics involved here,,just torque controlled, unless otherwise selected.

With a slightest pressure on the throttle, thus not increasing the torque, the car does not speed up in proportion to the RPM change. And as before a diesel car is doing much lower RPM than a petrol, and much harder to see on the Rev counter, to increase the speed on my car I have to increase the pedal pressure more than the slight pressure to change the RPM