HPBCANADA.COM

I only have seen one of these. It was on a small motor. It worked well. It likely could not handle big power. Maybe some smart drag racer could copy the idea and make one with super tuff materials.

http://ontario.kijiji.ca/c-cars-vehicle ... Z429020578

i was told they grenade when surfaced.

That they do. They are also not legal. For our. Racing

I had a torqueshift for a while. The best water ski prop I ever had on my old Virage. It grenaded when I surfaced it, and was repaired under warranty. After that I kept it buried and started grenading my XR4 gearcases. I sold the prop after two gearcases.

Someone else made a shifting prop for a while. I think it was Aerotech. Theirs only shifted 6". Never heard much about them.

Good ski props as there were also concerns with the cam set-ups to get the right shift point

Anthony's right about the cam set ups. My brother never got his right and it keeps shifting at ski speeds, making a steady speed impossible.

There's a guy selling replacement parts. He seems to know what he's doing, but who knows.

http://www.torqueshift.aeromarine.com/