Some may find this site of use when considering engine upgrades
http://www.forcedaeromotive.com/

(used on Cessna and Cirrus aircraft as well as homebuilts)


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Homebuilt Product Details

The FAT supercharger system is now available for the TCM I0-550-N for
homebuilt aircraft. The lightweight system is located right next to the
firewall for good C.G. and a compact fit. No cowling modifications should be
necessary and no modifications to the propeller shaft are necessary. The
supercharger offers excellent performance gains, and has unsurpassed
durability.

Technical Information:

The supercharger is belt driven off the accessory drive pad next to the
vacuum pump. It will run much cooler than a turbocharger and should result
in much lower maintenance costs. It will add 7-8000 feet of altitude
performance to the I0-550-N. Impeller speed is a function of engine RPM and
therefore over speed and bootstrapping are not considerations. There are no
MP fluctuations while adjusting the throttle, or mixture. Idle cool down
periods are not necessary.

Sea level power to 8500 feet.
77% power to 12, 500 feet, 65% power at 17,500 feet.
Efficient - uses approximately 4.0 horse power at cruise.
Light weight - 27 pounds.
Cool engine temperatures.
Easy pilot workload - no bootstrapping or overshoot.
No TIT to monitor.
No pre-shut down cool down required.
Easy installation - no modifications to exhaust system, fuel system, or
intake system passed the throttle body.
No engine-oil driven control systems.
No scavenge pump.
No waste gate.
Can be removed and the aircraft returned to the normally aspirated
configuration.