Natalie and I just got back from Stick and Rudder. She was in the 912iS with the AirMaster the whole time and I was in the 914UL with the fixed Whirlwind. They were probably 50lbs lighter than us.

The 914 had a hose stop so that it generally only made 100HP with no over boost.

We out climbed them everytime and the plane showed its stripes once the DA started getting above 5000' but they were faster and could catch us everytime in cruise. The AirMaster with a turbo should be the best of both worlds.