When asking for technical help at the very least let us know the version of firmware you are running.Cliff's Calibration (Mapping) Guide is a MUST READ: http://www.vemssupport.com/forum/index.php/topic,97.0.html
Thanks Dave, solved it!Internal 54 kOhm pull-up inside CPU on SDA pin is not enough (naturally), now mounted 2.4 kOhm pull-up to +5 Volt inside ECU before 10k protection resistor.
Dynoed this engine with a Precision 6766 to 790 whp, with 800 Nm or more between about 4000-7000 rpm. It's quite ridiculous on street tires.
Also I had to set "measure tooth" to 4 to give me a third trigger position between 23-63 degrees.With this engine third trigger occurs every 90 crank degrees (15 crank teeth). Cam moves maximum 40 degrees and you do not want the third trigger position to be near 0 or 90 degrees at either end of the cam movement. Too close and at times it can trigger past the measure tooth and then the ECU will think the cam has moved to the complete opposite end and can't get it back. Dynoed this engine with a Precision 6766 to 790 whp, with 800 Nm or more between about 4000-7000 rpm. It's quite ridiculous on street tires.
Quote from: mattias on October 05, 2015, 03:25:33 pmAlso I had to set "measure tooth" to 4 to give me a third trigger position between 23-63 degrees.With this engine third trigger occurs every 90 crank degrees (15 crank teeth). Cam moves maximum 40 degrees and you do not want the third trigger position to be near 0 or 90 degrees at either end of the cam movement. Too close and at times it can trigger past the measure tooth and then the ECU will think the cam has moved to the complete opposite end and can't get it back. Dynoed this engine with a Precision 6766 to 790 whp, with 800 Nm or more between about 4000-7000 rpm. It's quite ridiculous on street tires. Do you have dyno plot. I'm doing one s54b32 car and i need to choose a turbo.