Nice one Alex.

Its amazing how much difference it makes. Mine was in RWD only recently after the G-Sensor needed replacing, in the wet it was useless. Now its working again, when it kicks in you really seem to need it. It is lots more stable, just on the road.

Clever system IMO.

 

Do you have any logging under braking?

 

Yeah I was logging all day so there will be plenty of different conditions will be in the data, let me have a look see if it turns up anything interesting.

 

How much do you charge for home tuition?

 

1.3 g is really impressive. Are you still on the AD08R's?

Good to see you having fun, anymore footage?

 

Yes still on the AD08Rs, they are 18mths old now I think, only done a few dry trackdays on them though. Seemed to rain every time I went on track last year!

The figures look good but they were a bit more noisy than the RSRs and no longer have the grip levels of the A048Rs which they pretty much had when brand new.

Lots of raw footage from the 19th not much edited yet. Just the geakery above and this sport with an amusingly driven 991 Turbo.

 

Sorry I think you was talking to the OP not me haha

 

Hehe I couldn't tell either. I saw some of your onboard though, looked great, 620 is a nice number, interesting you've detuned a bit, I've also turned down the wick, I was running 1.2bar and have managed 2:32 fairly consistent with a 2:30 fluke once in 2014. Now only 1bar but with much better response after Mark at Abbey dialed in the closed loop boost on the Link using the data we sent back and for in the course of the day at Silverstone. I get full boost after a gear change a full second sooner now. The result is around 450-470fwhp I guess which is pretty nice. I've also taken out the ABS and not yet got to grips with that so I'm afair bit slower over a lap, where I was getting 1.2g on the brakes I now squeak 0.9g and you see it in the logs killing the lap times, best I managed in decent conditions was a 2:36 on the 19th. Not all about lap times though and its really lovely to drive now. I was temped to switch back to high boost when I cpuldn't quite pass that Turbo on the straight though.:chuckle:

 

Alex, how are you collecting the 4WD torque split data? are you probing the CAN bus? I would like to get the same into my VBOX logs but I guess I would need to find the PIDs and then ask Racelogic to add those.

 

The old style ATTESA doesn't have any data output really so I fitted a pressure sensor into the transfer case itself and fed that into a gauge and then into an analog input on the link ecu. In due course I will output that onto the CAN bus and log it on my race technology video 4 logger which is already reading everything else from the Link CAN bus output, but for now its just logged in the Link ECU.

On an R35 no doubt it will all be on the bus so it may just a question of getting the CAN ids for your logger. The race technology logger can input box is configurable so if you know the can stream/frame details you can add it yourself which is very handy.

 

Thanks, I will try and find the PID for it and contact Racelogic, it would be interesting to see how the R35 torque split compares with the older generations.

 

Nice one AlexJ, definitely much better than what I read from my defi!
Now I really know how the AtTESSA helps me to look good.. hahhaha

Do you mind if I post the video in my local R32 whatsapp group?

 

Sure, feel free to share

 

Thanks!

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Yes that was a crap and confusing post- sorry!

Good seeing all these figures and trying to understand them. Thanks for the vids

 

Really interesting thread Alex. As discussed on the phone the other day it's really useful to be able to compare as I was convinced my 4wd was in too much when I'm seeing almost full 4wd on a try straight on hot tyres and therefore had a problem. However, it would appear that is exactly how it's supposed to work.

So that's good then, it's not broken again )

 

Good result.

 

Pulled some interesting data from the logs from Snetterton on Wednesday running in some very mixed conditions. Especially looking at the effect of the Skylab. I wish I'd been more methodical, I even forgot to turn on my main data logger so only got data from the Link ECU. That said, there is enough here to make for some interesting investigations next time:

Can anyone guess what happened around 8:15?

 

Go on.

 

Turned the Skylab down ... or up... wish I could remember You can see the attesa goes from being mildly active most of the time, changing to cutting in dramatically but less frequently.

The data above is basically two full laps at the start of the second lap I changed the setting because of changing track conditions, I just can't remember if it was getting wetter or dryer at this point lol.

The white plot is attesa pressure again btw. I've sorted out the scale in the link, nearly, the numbers are PSI but the label says kPa.

 

The skylab works great, and it really does make a difference to how the Attessa reacts...
Still waiting for the newest version though. .. getting impatient.. hahaha

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Which Skylab have you got?

 

Skylab Fusion

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Lol Fusion here also

 

Thought so.
Looks like you turned up the longitudinal and turned down the lateral or vice versa.

 

I can't see a link, is cos I'm on an iPad?

 

Oh, I've been a div again about sharing images from google photos here's what i meant to share, i'll try to embed the image again properly tonight when i am at a desktop (google have made it so you can't view the sharable url for images on the mobile browsers) https://photos.google.com/share/AF1...1PgeEZiZjByWjIsUExSOmaTyYktzUyc8xu?key=ZmRSMGpvLWU5VjNiR1pqSWtWdVhsN1k2UmNtdzJn

 

I think I figured it out using Dolphin, maybe my first post today will look a bit less cryptic now!

 

I didn't have problem viewing on my mobile..

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I feel that these test are very good, as by understand how the attessa works, and how skylab can adjust the system, we are able to adjust according to the tracks.
I use my 32 for 3 different tracks, so having an idea how all this works help me in deciding how much to turn the knobs
***128077;

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I didn't realize it would kick in for higher speed acceleration like at the end of your video. Is this behavior standard? Is there any amount of wheel spin it is detecting?

 

Very interesting, didn't know about the high speed stability 50/50

I'd also never heard of this, was surprised to see it and suspected some fault in my system, although at least one other person has reported seeing the same on the factory gauge so may be standard after all.

I dont have a reliable way of logging wheel speed unfortunately, the link can't handle the signals from the factory abs/ets wheel sensors; too high frequency and too high voltage at speed.

 

Very interesting, didn't know about the high speed stability 50/50