Question on timing & fuelling (with graphs)

[muckipup]

I'm hoping a 'techy' can help with some advice as to whether things don't look right or could be improved with the below graphs taken from some VCDS logging last night using a 4th gear pull. I am particularly interested in the timing pull, particularly on Cyl 2 and the lambda correction values that I have seen (lambda correction maxes to the full 25% at one point in the run!). Only 1 misfire on the sum counter on Cyl 2 throughout the run.

I am on a K04 fitted in December (so new S3 injectors etc) with relatively new iridium plugs, running Tesco 99, new APR HPFP and intake temps were 30 degrees C at start reducing to 25. Revo settings are B7  T6  F7 as set up at time of K04 conversion. The crude conversion of peak MAF gives an estimate of 310 bhp which is close enough to the 321 bhp when it was dyno'd.

Should I be tweaking Revo settings, investigating the timing pull or relax because its nothing unusual??  









And for info, here is the boost, rail pressure (interesting, as I thought Revo had that at 130 through most of the range) and MAF plots which don't look too bad...







Thanks  

[vRSAlex]

I would drop the timing down to 5.  You pull is very low down the rev range.  What gear were you doing the runs in?  I always run my car at fueling 9, but its all down to preference.

If you dont have the RS4 FPRV fitted then get one on the car.

The massive fueling dump at 5.5k is odd.  Shouldnt be doing that.  Could be a missfire or the EGT's getting too high.  How does the car feel when it does it?

Intake temps are good.

[muckipup]

Thanks again, Alex.

I will drop the timing down to 5 and play with the fuelling and see how I get on. I have hankered after the RS4 valve for a while but always vowed that I wouldn't go for it unless the rail pressure logs dictated - I think I'll give it a shot.

I am not feeling or logging misfires and the car generally feels fine. It feels 'laggy' in this rev region however I always put that down to the characteristics of the K04 as it comes to life very nicely from about 3000 rpm.  EGT is something that I will investigate (I'll need to look up the Ross-Tech manual on that one!) as I can't think what is causing that dump at 5.5k!!

[vRSAlex]

EGT is logged on 112 iirc.

RS4 reg is deffo worthwhile having.  Just gives the extra headroom needed for the high fuel pressures.  I fit loads of them here and everyone so far has been very impressed with the results.