What kind of losses can I expect in horsepower based on altitude? I'd be doing most of my flying around airports that are between 100-1000 MSL so I don't exactly need a turbo to help get off the ground. However, since this is a Cozy and it climbs quickly, it wouldn't be unusual to cruise between 8000-10000'. I'm debating whether a turbo would be beneficial, and if so how much.

Regards,
Chad