in ems booklet, it is specified that you can display the % power on 8.5 /1 compression ratio lycomings. Are you planning to add support for 8,7 /1 engines like io360c1e6?
It turns out what really matters is the redline of the engine. If your engine is a 2700 RPM engine, it will work fine. A future update will suport 2600 / 2800 RPM engines.