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
your map is very bad, probaly knock at 3000rpm. At high rpms you need more advance, no less.here is little retarded map for c20let 8.5:1, safe map(not for max power).http://img263.imageshack.us/img263/5743/mssparkv2set3.jpgbtw opel c20let stock exhaust mainfold is crap, cly 2 and 3 have many better flow.what is your trigger tooth and rising or falling?
I have 6*9+63=117