Hi all. Happy to see this thread has started some interst.
I agree with most of what has been said in the above posts. Too many "experts" give advice based on their experience in a limited field, not counting all the missinformation that gets thrown around in racing circles.
In my case, I have spent many hours doing the reserch before deciding to go down this path. I would not recomend it to someone with limited knowledge of engines and their operating systems.
Dave. to answer your questions. I am going to fuel inject the engine with a multipoint set up. Engine management system with closed loop O2 sensor and baro compensation. This is fairly easy to set up with the sysems available now. Sensors include ,crank and cam angle,MAP, intake temp ,coolant temp and knock sensor as well as tach. I am setting the compression ratio at 9.5 to 1. I am hoping to get around 100hp at WOT but anything between 80 and 100 will be ok for my aircraft.
This is another consideration: what aircraft is the engine going to power. Mine is a STOL and fairly slow cruise so the torque of the engine is being set at around 4000RPM for cruise and the prop set to achieve this.