Hey so I've been trolling on this website for awhile and learned enough to do a rudimentary tune on my 02 A6 with a 2.7t. Last revision was awesome to the point of an AWD drift on somewhat wet pavement and an accelerated heart rate. My smile was soon replaced with lots of wrenching as the clutch was no more after a couple more launches on boost... Long story short I replaced the clutch with a stage 3 from ECS and while I was at it I replaced the turbos to KO4's. I've got a P6133 code after putting it together and based on the manual it would appear that my ECU isint sending voltage to the sensor. Anyone know about this>? Also I'm looking for some info regarding the safety of the KO4 using a ko3 tune

There is nothing wrong with running k04s on a k03 tune *if* the wastegates are set up correctly.

Well, the least you can do until you manage to log your car is loosen your wastegates to avoid excessive boost or sudden boost spikes, as nyet suggests.
Until your fueling and ignition and boost control system is calibrated for the new turbos, it is not a good idea to just let it run like this.

6-8 degrees is a lot. That's one knock event away from being maxed man.

Almost a thread hi-jack, but what do you guys consider an acceptable CF limit?

I tend to aim for 2-4 in a 4th gear WOT run, I figure if it gets hotter during the logging then it's a bit safer during real world driving as it gets even hotter then if you're going up into 5th or even 6th gear.

If I do a quick run in 3rd I don't tend to get any CF, sound acceptable/correct ballpark?

Thanks Ddillenger, that's exactly what I've been aiming for. I usually get as you say, 1/2 cylinders with a couple of corrections which subside almost immediately.