K04 + tiptronic software question (max shift RPM and WGDC)

[baldy]

Just have 2 questions for anyone with a tip that's running a K04 or bigger, whether on Unitronic, APR, JHM, Maestro, GIAC, UM, etc.

1) in your logs, what max RPM does your transmission shift at?

2) under spool up, what is your WGDC?

Since some tuners up the rev limit to 7,200 RPM (which is fine for manual vehicles, but the tip max shift point is limited to ~6,800 from my understanding), should the RPM limit for a tiptronic tune be increased or left alone? Reason I ask is in my case, sometimes it will shift smooth ~6,700, while once in a while it feels like it will cut almost all power and won't shift until ~6,900 almost. (no I don't always drive like this, but when passing on the highway I have noticed this)

In regards to the WGDC question, I'm running the standard Unitronic K04 RFD file (labelled Rev5) which seems to only request a max of 74.9% during spool up, whereas every other log I have seen from other tuners (and even Unitronic tunes for the MKV K04 / golf R, and every log I have from the prior rev file and all prior stages) shows the usual 99.6. I emailed Unitronic back in November asking about this, since I remember CanadianB7A4 (think that's right) said that a post (and a PM) that Unitronic limited the WGDC on the file because he was over boosting (and testing the new revision that now has increased timing vs the previous revision) and wonder if they just forgot to put it back to 99.6 after everything was completed.

Thanks guys

[vce1232000]

Im going to probably run some logs with another member on here for my JHM KO4 tune this week or next. I will ask to run what your looking for and pm you the data. But I can tell you that my Tip shifts at 7200 rpm with its wot. The transmission finds itself in a delay between gears upshifting for about a full second

[baldy]

Hey, thanks for the reply. I thought APR left the RPM limiter at 6,800 (at least according to their website)

[Sanjman]

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[vce1232000]

Hey, thanks for the reply. I thought APR left the RPM limiter at 6,800 (at least according to their website)

With that being said. Let me at the rpm closer when the tip 's at wot. I remember seeing it starts to shifts and then its a delay. Then rpm surges slightly then s into the next gear. Maybe im getting it between the tune and what actually happens

[Mindstorm20]

I was under the impression that no ECU tunes could change the rpm limiter on the tiptronic because it's coded in the TCU. With that being said, I have seen what vce is saying happen plenty of times.

[baldy]

I was under the impression that no ECU tunes could change the rpm limiter on the tiptronic because it's coded in the TCU. With that being said, I have seen what vce is saying happen plenty of times.

That's the same impression I had as well after researching via a friend who is a master tech at Audi. He looked up some technical papers as well as the documents from ZF that basically state the 6HP19 in our cars is programmed to shift at an absolute MAX of 6,900, which is why the stock Audi tune has an RPM limit of 6,800.

So my question about this is when getting a tune from any tuner, (let's say Unitronic as an example in my case), if the tune is made for a tiptronic then shouldn't the RPM limit in the ECU tune be set to accommodate this limitation? Maybe I'm not reading something correctly, or missing something, but it appears that you would want the ECU and TCU limits to be the same.

I understand the TCU will intervene, worst case, and shift once it sees the RPM signal from the ECU is higher than it should be, and the "actual design limit" on the input shaft is 7,450 RPM on our transmission (and will throw a code if it reaches it, and go into limp). All good. But when you let the transmission shift on its own while you're passing (foot to the floor or close to), because the RPM limit in the ECU is higher than the anticipated 6,800 (...and the engine is revving still...), every so often the transmission panics and kills engine power for a second or two (literally) while trying to shift. However, if you manually shift before, say, 6,700 RPM the transmission shifts really quickly as though you were under part throttle. That being said, it appears if the ECU limit would be left at the stock RPM, those of us with tiptronics would enjoy quicker shifts...

Am I wrong?

Or if JHM would release their TCU flash, maybe we could benefit from the higher ECU rev limits...

[baldy]

So after looking over a few threads on various forums (local and abroad) every log I could find for a K04 on our FSI engines shows the wastegate on spool up is 99%. Even the golf R Unitronic logs.

I sent an email to David at Unitronic a couple of days ago about this, as it appears maybe this 74% cap really is an oversight that they just didn't change back after helping someone out or were modifying / upgrading the tune.

Will wait and see what the response is.

I flashed back to the custom file they made for me, and the WGDC 99% as well. That being said, under part throttle around town and on th highway, it's much much more responsive. The boost on the highway at 2,000 RPM when applying a little throttle up hill is easily at 10 psi and the transmission doesn't have to shift to maintain speed. Much smoother. Whereas on the 74% capped regular file it struggles with 5 psi and ultimately the transmission either unlocks the torque converter or it shifts.

About the rev limit for shifting on Tiptronic, I found quite a few logs from "across the pond" that the shift point is just below 6,800, but the majority of logs I saw from our side of the world were between 6,820-6,880 RPM. Not sure what to make of it. The only thing that stands out in the logs where people left vagcom running during the shift is anything over 6,800 looks like it takes at least half a second longer to shift, judging by the boost and MAF logged.

[Sanjman]

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