lookforjoe
True Classic
And with those changes, how does it feel different from before? Any logging for the AFR?
Is the Volvo knock sensor system very aggressive in knocking back timing? Would it be better to use a normally aspirated system like VW's that they used on the 9A twincam or similar? I would think a system tuned for a NA engine would be less aggressive in knocking back the timing and more willing to move it back up. Just a thought.
Could it be the placement of your knock sensors or is that a non issue as its looking for a particular frequency? Lots I don't know about knock sensing systems...but willing to learn.
Yes, it does feel much better now, just need to refine the timing. I cannot log AFR.
The ignition control does not pull that much timing, it can do it in small increments or larger amounts, I just don't recall offhand. I'll need to check the manual for exact numbers. It is an NA setup - the turbo version actually has less advance & much more fueling.
The placement of the knock sensor may be an issue. I used the oil pressure port, maybe it's not registering the frequency properly in that location. I haven't had any error codes for knock malfunction, but if it's just not recognizing that knock exists, that's a problem. I'm going to attach a 'det can' to the motor & listen for knock while testing under 'spirited' driving conditions - I have some sweeping mountain roads near me that are perfect for load testing without going too fast..
Current mapping, took just a lttle off the upper load cells.
Last edited: