GolfGTIforum.co.uk
Model specific boards => Golf mk6 => Topic started by: am1w on 16 January 2011, 03:14
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VW have re-calibrated the ACC for GTI/GTD/R models to be firmer in comfort, normal and sport modes than for other Golf models.
I personally would like to have the 'comfort' as the 'normal' mode, make the 'comfort' mode even more comfortable, and leave the 'sport' mode as it is, it being useless for this country.
Therefore, I would like the ACC for my GTI to be re-calibrated to the standard set-up.
Can anyone be able to fulfill this request?
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Doubt it, as its all programming.
I should still have the design overview and explanation from the company who makes it/designed it for VW somewere unless i through it out. It was in one of my electronics design trade mags i get.
Normal mode constantly adjusts its not like comfort or sport its operational band is allowed to go to the extremes but its start/reference point is much higher than the comfort start point.
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Thanks Snoops.
In general, I am aware of the workings of ACC.
What I would like to know is whether the specific software bundle for ACC for the 'standard' Golf models may be used to replace the specific ACC programming bundle for the GTI?
Be nice if the ACC on the GTI could mimic the standard set-up.
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its a sporty car... WHYYYYYYYYY??????????
:huh:
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You could try swapping the control unit to one from a non gt version
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You could try swapping the control unit to one from a non gt version
That is a very interesting suggestion. I thought of this too, but wondered if the software could be re-calibrated.
its a sporty car... WHYYYYYYYYY?????????? :huh
Because I don't like squashed tomatoes. :tongue:
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Can anyone please tell me:
(a) Where the ACC control unit is situated?
(b) Is it easy to get to?
(c) Is it part of some other electronics module?
(d) Has anyone attempted re-calibration?
(e) The cost of a replacement module
Thanks.
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I'll pull the fuse this week one day and let you know what happens, I can't help but think a non acc car will be fine for me next time as I use normal 90% of the time.
The sport for me is too firm and the comfort too sloppy for me personally.
I'll have to drive a GTD with no acc to be sure but I've always been happy with the ride in MK6 GT TDI's.
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Doc:
No need to pull the fuse out as I have already compared the 'normal' ACC mode with the standard set-up. The ACC equipped cars were definitely better. But many thanks for the offer.
However, my four questions still remain unanswered. :sad:
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It's to see if it goes all "out of shape" or as I suspect makes very little difference, I keep reading that it adjusts in normal mode but what does it adjust and how?
On the other hand with no power going to the shocks they may go super soft just as you require :-)
I don't have the answers you require to your questions above.
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It's to see if it goes all "out of shape" or as I suspect makes very little difference, I keep reading that it adjusts in normal mode but what does it adjust and how?
On the other hand with no power going to the shocks they may go super soft just as you require :-)
I don't have the answers you require to your questions above.
Most grateful to you for trying. But please don't risk your car by pulling the fuse out.
Thank you. :smiley:
I'll be doing it because I want to know if I'm right :grin:
I'd like to know too. :grin:
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I'll be doing it because I want to know if I'm right :grin:
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It won't go super soft, not if its been designed correctly and known the company who did it i would guess they did just that.
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but what does it adjust and how?
In normal mode it's constantly adjusting between the extremems of sport and comfort dependant on how it's being driven etc. The computer is adjusting the damper valve orifice using an actuator integrated into each damper.
I'm sure that the differences between the GTI and lesser Golfs are down to physical hardware differences in spring and damper rates rather than being just a software change. If someone wants their GTI more comfy they'd have to put softer springs (possibly with longer travel and increased ride height) and/or ACC dampers from the stock Golf. No doubt a few tweaks would be needed for the ECU to be happy with the dampers.
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mac7:
Yes, the suspension on the Mk6 GTI/GTD is firmer then for the Mk5 GTI and other Mk6 Golfs.
Also, VW have re-calibrated the ACC software for GTI/GTD/R models to be firmer in comfort, normal and sport modes than for other Mk6 Golf models.
The question on this thread is whether the Mk6 GTI ACC module can be re-calibrated to mimic the standard Mk6 ACC set-up or changed for the standard Mk6 ACC set-up.
There is no question of physically changing dampers or springs.
I hope this clarifies the purpose of this thread.
The reason this whole thread started is because in the last 500 miles (I've done 3.3k miles), I have definitely felt that the 'comfort' mode is no longer as comfortable as it was and have also felt there have been changes wrt ride in 'normal' and 'sport' modes. The three modes now have distinct differences, much more so than when I first got the car. I regularly check the tyre pressures very carefully and have maintained these at 2.6 bar (37.7 psi).
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I like this post btw, it's the kind of thing I like to get my teeth into :smiley:
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mac7:
Yes, the suspension on the Mk6 GTI/GTD is firmer then for the Mk5 GTI and other Mk6 Golfs.
Also, VW have re-calibrated the ACC for GTI/GTD/R models to be firmer in comfort, normal and sport modes than for other Mk6 Golf models.
The question on this thread is whether the Mk6 GTI ACC module can be re-calibrated to mimic the standard Mk6 ACC set-up or changed for the standard Mk6 ACC set-up.
There is no question of physically changing dampers or springs.
I hope this clarifies the purpose of this thread.
Yes, but I'm pretty sure in this case the term re-calibration relates to the base spring and damper rates being uprated for the GTI, not the software. If I'm right then even if you did reprogramme the control software you still wouldn't be able to go outside of the physical sport/comfort limitations of the GTI damper hardware.
What I'm trying to say is it's a hardware difference, not a software one.
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No mac7, it is a re-calibration of the ACC software in addition to a change in the spring and damper rates plus thicker anti-roll bars. This is straight from the mouth of the Mk6 GTI chassis engineer Ulrich Sonnek. :smiley:
In a GTI pre-launch write-up in Car, the chassis engineer Ulrich Sonnak was interviewed by the magazine. His goal was to sharpen the Mk6 GTI even further whilst working within the constraints of the Mk5's architecture. The anti-roll bars are a bit thicker, which naturally tightens body control. They contibute to a chunkier feel through the steering on turn-in. So there is a better sense of grip and more confidence. The spring rates are also firmer.
Thus the Mk6 may have a harder ride than the Mk5.
It is for this reason I ordered ACC.
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The reason this whole thread started is because in the last 500 miles (I've done 3.3k miles), I have definitely felt that the 'comfort' mode is no longer as comfortable as it was and have also felt there have been changes wrt ride in 'normal' and 'sport' modes. The three modes now have distinct differences, much more so than when I first got the car. I regularly check the tyre pressures very carefully and have maintained these at 2.6 bar (37.7 psi).
Are you still on the factory tyres, or did you put winters on? Reason I ask is the weight of the tyre might make a difference (unsprung weight). Also from experience it takes a few thousand miles for dampers to 'bed in' which could also explain the change.
No mac7, it is a re-calibration of the ACC software in addition to a change in the spring and damper rates plus thicker anti-roll bars. This is straight from the mouth of the Mk6 GTI chassis engineer Ulrich Sonnek. :smiley:
Thinking about it, you would have to recalibrate the software to match the different spring oscillation characteristics and roll bar rates. But I stand by my belief that to soften the GTI beyond the comfort setting would require different dampers and springs.
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I am still on factory Bridgestone tyres and have done 3300 gentle miles.
The winters are now in storage at the tyre fitters.
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Fit 16" wheels with 205x55x16 tyres job done. :tongue:
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At the end of the day, ACC only adjusts a valve on the damper body that regulates the oil flow of the damper.
So, dampers are model specific to start with...fitting Match dampers to a GTI would completely bugger up the GTIs handling.
There is only a finite amount of adjustment available on the adjuster I'd imagine...it's only a 2 pin connector, so the min to max orifice will be set...so regardless of which controller you fit, you'll still only be able to control within the physical limits of the model specific damper.
I would imagine the controllers are the same with slightly different maps maybe, for speed of response...but I very much doubt that changing any one controller for another will give massive differences on AC function if the dampers remain as supplied with the car.
Personaly, I find the GTI settings pretty spot on. Standard is as you'd expect a well honed hot hatch chassis to be...comfort is under-damped and wallowy...sport too harsh for most roads nowadays..but the steering map changes do allow you to get the tail moving a bit.
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Thanks Ess_Three for your response, mac7 for looking into it and branchespark for posting relevant links in the ACC?.. thread.
So a change or re-calibration will have a very slight effect. This could be what I am looking for. But I'll also wait to change the tyres and see if this improves the secondary ride.
But can someone answer the questions below, please?
(a) Where the ACC control unit is situated?
(b) Is it easy to get to?
(c) Is it part of some other electronics module?
(d) Has anyone attempted re-calibration? Answer = No
(e) The cost of a replacement module
Thanks
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Third time request:
Would an expert answer the questions below, please?
(a) Where the ACC control unit is situated?
(b) Is it easy to get to?
(c) Is it part of some other electronics module?
(d) Has anyone attempted re-calibration? Answer = No
(e) The cost of a replacement module
Most grateful.
Thanks.
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Third time request:
Would an expert answer the questions below, please?
(a) Where the ACC control unit is situated?
(b) Is it easy to get to?
(c) Is it part of some other electronics module?
(d) Has anyone attempted re-calibration? Answer = No
(e) The cost of a replacement module
Most grateful.
Thanks.
I'm no expert, but it seems your answer is nobody knows yet
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The questions to a, b and c are answered in the links that branchespark provided and e can be answered by your VW dealer.
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The questions to a, b and c are answered in the links that branchespark provided and e can be answered by your VW dealer.
Thanks. I was being lazy and did not look at the links carefully enough. Will do so now on your recommendation.
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On the subject of ACC - does anyone know how to adjust the steering assist setting in "Sport"? Following repairs my car came back with normal and sport being more or less the same (both being too soft for me).
I've read that steering assist can be adjusted using VAG-COM but only up to 2007: Controller 44, Steering Assist, Adaptation, channel 1.
Does anyone know?