Hi! I drive some vintage racing (in sweden) and also has drove lot of other dragracing but i will try to tune my engine more (rotax 537) and for the moment i wounder little about rotaryplate settings.
Just now i have tried to run on 142-72 and engine feels strong and we drove quite fast this winter but my carbon disc has been litte damaged (worn in edges) so now i will try to new ones and my question is.
Porting/engine feels good but what would happen if i set it to 144-76 or 144-78 if i compare to my 142-72,
have had some problem to get it up to right RPM but have with little pipe work got it to near 9000 few moments. it would go up to 9200 and it is not weight problem so van disc have something to do with it??