How many of you guys are seeing knock on 3rd gear pulls? With a slightly retarded factory timing map I am still seeing some knock counts at wot. Heres my timing map:

 

Doesn't help much without AFR logging.

 

http://forums.openecu.org/viewtopic.php?p=5961#5961

Just a little something i've been working on to help with the read of the logs and yes it needs alot more work.

 

yep timing is pull about 2-4 degrees at about 5200rpm on 3rd gear. well atleast always for me

 

try extending out your load colmuns to 300 or so (search for how this is done). That seemed to do the trick for me when I was getting timing pulled between 3-5k.

 

$15 spent! Can't wait to use it!

 

UNGH!!!!! I lost my serial number to register on my computer.....what do I do???

Who can I e-mail to get the code????

 

pm evo4mad on openecu.org forum

 

6 items being logged X 108 samples collected over 4.6 secs on run through 3rd gear, going WOT at 3000 where the log starts and lifting at 7000 RPM, 1.65 kg/cm^2 held through midrange, rolling at the top - moreso in 3rd gear than in higher gears.

This graph http://john824.fotopic.net/p31038755.html shows injector pulse width (ms), ignition timing (degrees - may not be scaled correct yet), knock sum. I also logged TPS, O2 sensor which are not shown.

 

^^ Timing looks to be scaled right. It's certainly not off by + or - 10 degrees. Helluva lot better sampling rate than my slow-a$$ OBD-II logger.

l8r)

 

http://john824.fotopic.net/p31039777.html

Here is a more complex log at the same high boost setting as the first one I posted. It is the ECU that had been mapped that I received the car with. It runs a bit more timing during spool up, but I retarded and enriched this area on my maps to prevent detonation here. You can see through the midrange that there is a higher knock sum being recorded and it runs less overall timing. There are differences between the fuel maps. You'll see at the top end they are similar, but that there is a lower IPW on the first one I posted - it runs a nicer AFR for top end power. I voluntarily pulled a degree out at 6000-6500 RPM because of occasional knock, it seems that the ECU is recording a lower knock sum and therefore probably ending up with the same timing but safer and perkier overall. The logging is all displayed here with Excel, and it is difficult to put logs over each other at this stage.

 

Extending your load columns will do nothing to combat existing knock counts. The only time extending the load columns should come into play is if you are getting some pulled timing with 0 knock - read: your logged timing values are lower than the matching load cell in the HOM 260 column, but higher than the matching cell in the LOM 260 column.

l8r)

 

A note on injector pulse widths... on the first plot the last point plotted is 6906 RPM with 15.6ms IPW out of 17.4ms available at this RPM, so injector duty cycle is 90% at this area of 3rd gear. It will be interesting to see what it does in higher gears. WBO2 readings are low 11:1 at the top +- a bit depending on gear again.

 

how do you save the datalog file. I just tried to do a run and I can't figure out why I can't save it to look at it. Am I missing something

 

It saves automatically.