Just because it may happen at tip in doesn't necessarily mean it's due to tip in settings. More likely it's due to not enough closed loop fuel or plain old too much timing.
Also, you have to look at the very first occurrence of the knock to see what the problem is. All the repeats in that same rpm/load cell are noise.
Example (marked):
http://datazap.me/u/solidone/z6-kc1h...1711&mark=1576
Data:
- Constant load
- Constant rpm
- Closed loop
Cause:
- Too much timing
- Too lean closed loop
Here's one you would probably like to think is tip in:
http://datazap.me/u/solidone/z6-kc1h...mark=1576-7884
Data:
- 5700 rpm
- 0.75 load
- CL/OL transition
- 14.0 Commanded AFR
- -1.0 FLKC
Cause:
- Open loop, and possibly closed loop too lean. Open loop should probably be around 13 and closed around 14 then commanded would likely be more around 13.5 and that knock would be less.
- Or take some timing out of that area if you want it running around 14.0.
- Or reduce transition timers or whatever other people like to do.
You're at 14.0 COMMANDED AFR at 5700 rpm, then 0.2 seconds later at the same rpm and load you're at 13.0 which is what you actually want. Tip in enrichment is a work around when the real solution is to fix your commanded AFR by 5 to 10 points.
OR if you want to be at 14.0, just make open loop 14.0 in that column and take the timing out. Then it won't knock in both closed and open loop.
Quote:
Originally Posted by solidONE
Not quite a track log, but here is one going up the canyons today. Log started after a decent pace run up and down the canyons so oil and coolant temp should be up there. I'll have to remember to change the parameters next time. It looks like I'm getting pretty consistent transient throttle flkc. Not a huge amount but consistent FLKC at throttle tip in and each time I close the throttle suddenly. Did not have the KC logged either. I may look into doing some more adjustments on the transient ignition retard tables as well after I get some more logging done with the relevant parameters. Will also check my exhaust hardware just to be sure I'm not getting this flkc from exhaust vibrations.
http://datazap.me/u/solidone/z6-kc1h...og=0&data=1-11 |