I'm building up a 998 with an M45 supercharger. It will be running a HIF44 which I am able to set up using a wideband and a camera looking at needle position; however I could do with some wiser peoples' knowledge regarding ignition timing....
As far as I can establish from loads of googling it seems that the max ignition is likely to need to be around 24degrees. To achieve this I'll modifiy the max advance limit stop within a new 59d distributer so that I can run 10degrees static, advancing to 24degrees maximum. Obviously the curve in between isn't necessarily going to be ideal, but initially is this a sensible approach?
Is there anybody who can share what their ignition mapping is for a 998 supercharged engine? I'm fully aware that the spec of the engine will affect the finer detail, but some knowledge of what oithers have ended up with can only help
Here are some pictures of the parts of the system I've made so far for those interested. Nearly finished..it'll be ready to start in a week or so:-
20220110_172721767_iOS (1).jpg 50.55K 1 downloads
20211205_191759142_iOS (1).jpg 102.07K 1 downloads
20220110_172740187_iOS (1).jpg 89.91K 2 downloads