Wayne Cox wrote: > baseline by moving the distributor is invisible to the ECU, and > performance gains can be made. 17 - 19 BTDC is optimal. On stock cams and ECU. Last I saw S3's with stock ECU made more power at 15 degrees. With JWT ECU always 15 unlise otherwise specified by JWT. However these results are all on crappy SoCal gas. 93 octane might make a difference. Not sure. RK