I would still like to see the PV be able to export the log file to a .dif file for viewing in LogWorks 3 (The DashDaq can do this so I think it's possible to get the PV to do it).

 

Thank you very much all your efforts here helping us its very much appreciated. I was confused with the spark knock selection could add "retard" on selection instruction? I did not recall reading it but that does not mean it was not there. It makes sense now that you point out the log tuner is looking for Retard. I think I am good to go for the time being.

 

Thank you for the additional input.

 

Actually, most (all?) knock detection today has no external hardware mounted to the engine block to detect knock. Ion-sensing knock detection, the method used in Harleys at least as far back as '07, does not use a sensor that is externally mounted on the engine. The name "ion sensing" is derived from the fact that as detonation occurs ionization at the plug tip changes the resistance to fire the plug. The actual detection of this change in resistance is internal to the coil and the signal is sent back to the ECM.

 

i monitored the spark knock while riding.. it has always displayed zero. is this normal ?

 

I stand corrected. My Dodge Magnum hemi has knock sensors physically mounted to the engine. The downside is that sometimes they can produce "false knock" when the displacement changes from 8 cylinders to 4 and back again. I log sometimes 5 degrees of KR during the transition of 8 to 4 and back again.

 

If you are using a canned tune with good quality fuel, yes 0 knock is normal and very desireable.

 

Iclick, can you explain something to me on how the PV knock adjustment works? I used the PV Basic tuner to tune for knock. I'm unable to use it for tuning VE since I'm using the stock NB sensors and my dyno-tuned map AFRs are too far off from 1.00 lambda. So I figured I would use the spark adjustment capability of the PV basic tuner just to see what I would get.

I logged a number of good runs that varied alot. The dyno-tuned map was pretty good from a spark perspective but there were a few areas where there were small knock events. Mostly out near 70-90 kpa and 3500-4000 rpms. Again these were relatively small events but I thought I would let the Tuner make the appropriate adjustment.

The tuner lowered the spark and when I logged again the knock event was either gone or reduced to nearly nothing. What I did notice was that the performance of the bike from just this small timing adjustment made a noticeable reduction in performance that could be felt from the saddle.

Is it possible that the basic tuner algorithym is too aggressive in lowering the timing when it reads a knock event. In any case I went back to the original dyno-tuned map and immediately felt the improved performance. Is it possible that PV tuner is lowering the spark advance more than the ECU knock retard is lowering it which is why I feel the reduced power?

 

Zero for spark knock is a good thing. You would only see it when a spark occurred and you needed to retard your timing. That is normal.

 

So how come the parameters from my ORIGINAL factory tune are so small (see screen shot). Where are the VE tables, etc??