VSA/traction probleme when tuning?

[Garrett_si]

Does someone notice power reduction on dyno sometimes?

I tune 2 civic Si 2012 last week, and sometimes the power in the powerband drop

I attach the dyno sheet, and the datalog files

Ignition, throttle, cam don't change at all during the run.

both cars do it.

[Spunkster]

You need to post the calibration that was used when the datalog was made.

[Garrett_si]

here is the cal file used

I did 3 dynoruns with this calibration.

2 were fine, one has the dip

[Spunkster]

The only thing I can see is that it gets a little leaner in the 6000-7000 rpm range on the datalog, but I do not see anything else in either the datalog or the calibration.

[Garrett_si]

I see the same thing, and I don't understand why the car do that, this happens a couple of time the same day on 2 differents civic Si 2012

[Spunkster]

The only other thing that I can see that could be effecting this is the knock ignition limit tables where there are negative values. Read more about this at http://www.hondata.com/help/flashpro/kn ... tsub=knock