Y Cymro Posted November 15, 2022 Report Share Posted November 15, 2022 Hi I’m using Carista diagnostics on my UK mark 7.5 2018 Golf R and see under ‘Chassis & Engine configurations’ there is a setting for ‘Haldex AWD System Setup’ which allows me to change the parameters from the current ‘Standard’ to ‘Rear bias’. Has anyone tried this using a diagnostic tool and does it work/is it worth the change, or would it work only on the mark 8? Many thanks Quote Link to comment Share on other sites More sharing options...
Y Cymro Posted November 15, 2022 Author Report Share Posted November 15, 2022 Ok, a quick search found the answer on the Carista website: https://blog.caristaapp.com/more-on-haldex-5702d727d8b6 Dickie-D 1 Quote Link to comment Share on other sites More sharing options...
sibbers Posted November 15, 2022 Report Share Posted November 15, 2022 I’m interested to know what reduced noise does… I’ve tried increased traction and you can definitely notice it. I thought I noticed it being more juicy and decided to reset back to default, given I’m not driving spiritedly enough to warrant it full time. works on mk7s btw Dickie-D 1 Quote Link to comment Share on other sites More sharing options...
Y Cymro Posted November 17, 2022 Author Report Share Posted November 17, 2022 So ’rear bias’ was turned on yesterday using the Carista app, and as @sibbers confirms above it definitely makes the rear more lively. On a short drive it appears that any delay in triggering the Haldex coupling has been removed, and that torque is sent instantaneously to the rear diff once cornering forces are identified. I’ve read many road test reviews of the mk7/7.5 R and the results are often that the car is ‘boring to drive’. I think reviewers confuse the feeling of being boring with being massively capable, but from my very brief drive I would suggest that with this new setting the car is more exciting, and drives more like a rear-wheel drive car with very good rear grip and traction, though any rear waywardness is quickly controlled by ESC. It might be that ESC Sport will be even more lively so will try this over the weekend. Of course, this may not be what you (or I) want on the public road - where capability is far more important than excitement! - though it might be fun to explore on a track day. Dickie-D 1 Quote Link to comment Share on other sites More sharing options...
sibbers Posted November 17, 2022 Report Share Posted November 17, 2022 That’s a great summary. Exactly what I think too. I might re-enable it and see if I still think it drinks juice faster - do let us know your findings. Quote Link to comment Share on other sites More sharing options...
BenEssex1989 Posted November 18, 2022 Report Share Posted November 18, 2022 Can carista also change the "starting vibration reduction" ? I've heard for manuals this greatly improves the launch, apparently the car doesn't bog down as easily. Quote Link to comment Share on other sites More sharing options...
NJS Posted November 18, 2022 Report Share Posted November 18, 2022 19 hours ago, Y Cymro said: So ’rear bias’ was turned on yesterday using the Carista app, and as @sibbers confirms above it definitely makes the rear more lively. On a short drive it appears that any delay in triggering the Haldex coupling has been removed, and that torque is sent instantaneously to the rear diff once cornering forces are identified. I’ve read many road test reviews of the mk7/7.5 R and the results are often that the car is ‘boring to drive’. I think reviewers confuse the feeling of being boring with being massively capable, but from my very brief drive I would suggest that with this new setting the car is more exciting, and drives more like a rear-wheel drive car with very good rear grip and traction, though any rear waywardness is quickly controlled by ESC. It might be that ESC Sport will be even more lively so will try this over the weekend. Of course, this may not be what you (or I) want on the public road - where capability is far more important than excitement! - though it might be fun to explore on a track day. I have had the rear bias turned on on both my mk7 after trying the standard setup for a few months and mk7.5 almost immediately after collecting it. There is a definite difference that I think is most noticeable when pulling out into fast moving traffic from a side road. I find it instils far greater confidence on a wet road as well. I also found this on Carista but now use OBDII so I haven't bothered to look at it on the OBDII app or long coding. Quote Link to comment Share on other sites More sharing options...
markjw326 Posted November 28, 2022 Report Share Posted November 28, 2022 Sorry for my ignorance, but is this something that could be coded to only be switched on in Race or Individual driving mode?ThanksSent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
BenEssex1989 Posted November 29, 2022 Report Share Posted November 29, 2022 Got carista in black friday, changed the haldex bias to more traction and changed the throttle response. You can definitely feel the rear wheels kick in sooner, feels as if there is no delay at all now. Dickie-D 1 Quote Link to comment Share on other sites More sharing options...
golf7.5r Posted November 29, 2022 Report Share Posted November 29, 2022 23 hours ago, markjw326 said: Sorry for my ignorance, but is this something that could be coded to only be switched on in Race or Individual driving mode? Thanks Sent from my iPhone using Tapatalk Nope, not using any of the std tools anyway. Quote Link to comment Share on other sites More sharing options...
markjw326 Posted November 30, 2022 Report Share Posted November 30, 2022 Shame, sounds like it would make the R much more fun, in the right circumstances….Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
GB30001 Posted December 1, 2022 Report Share Posted December 1, 2022 Although not mode switchable not to hard to switch on before a Sunday Morning drive. would imagine it does use more juice due to higher drivetrain involvement. Quote Link to comment Share on other sites More sharing options...
sibbers Posted December 5, 2022 Report Share Posted December 5, 2022 I tried it again. Instantly noticeable. It does feel more grippy, but it doesn’t feel quicker and I think that it’s a false economy to want something that feel more like full time 4 wheel drive in this car - it’s a FWD car with the ability to engage the rear wheels when needed. I think the balance is about right for what is essentially a passenger car. I tried the XDS settings too. Strong interferes too much. I’m not sure if I prefer weak or deactivated but am leaning towards deactivated. I would love to find some definitive explanations of all the things going on, but regarding the increased traction option - I think that unless you’re spending time driving on dirt, it’s better left at default. Oh yeah, and definitely more juicy. Makes sense as said above. Dickie-D 1 Quote Link to comment Share on other sites More sharing options...
Deano Posted December 5, 2022 Report Share Posted December 5, 2022 XDS is just wheel braking. For example when you’re cornering it brakes the inside wheel to send more power to the outside to improve traction. It basically gives the open diff some of the characteristics of a limited slip diff. It’s quite clever but results in excessive brake wear. sibbers 1 Quote Link to comment Share on other sites More sharing options...
sibbers Posted December 5, 2022 Report Share Posted December 5, 2022 I’m not so sure how clever it really is. Is it just as simple applying braking force to the inside wheel(s) according to steering input, or does it do clever stuff in addition to that under any other circumstances that make it behave more like an actual diff? Do you know of it takes effect on front only, rear only or both inside brakes? I assumed rear but actually I have no idea. It just felt like that. I think my preference will be to deactivate seeing as an open diff is fine when the inside wheel doesn’t lift and there’s no traction benefit when it comes to laying down the power etc… Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.