Odd behaviour on the rollers

[Rosso TT]

Took my car to a dyno day (RR event) on the week end.
The operator started to load the car and when on boost, all of the sudden the power cut down for a split second and kept doing this a couple of times during the pull, car never done this on other RR events.
The operator rekoned is the haldex cutting in and out, i've seen a graph where the haldex makes more jagged line than what i've got, i think is throttle cut of some sort, the ESP was turned off when on the RR.
My car is 05-00 build, so is my car been recalled by the factory to fit ESP or did it come with it?
I'm asking this because i've heard storyes where a retrofitted ESP can never be turned off completelly or are just bolloks and problem is something else?
Cheers
Ross.

 

[<tuffty/>]

Assuming 4wd rollers? looks like haldex kicking in tbh... if the rear rollers aren't matched/driven from the front rollers then haldex will be cutting in and out.. easy fix is to run with the fuse pulled...

<tuffty/>

 

[Rosso TT]

Yes tuffty, 4wd dyno, this is the first time the car runned on a mailine dyno.
Past times always used dyno dinamics.
Other cars like TTS, 8P A3/S3 and golf R didn't suffer from the same issue, i do run a peloquin TBD at front.
Next time i'll pull the fuse out.
Cheers
Ross.

 

[<tuffty/>]

Gen2 and above Haldex on later cars don't suffer as much as our Gen1 ones do... pulling the fuse is a simple enough task though...

<tuffty/>