Rotary Powered GPR in the works...

[Hydrotoys]

Welcome Aussiegp1200.

Keep us up to date on your progress.

The only things I can think of right now, is that you will need a water jacketed exhaust, and the overall engine height looks tall in the picture.

[HopatcongGPR]

LMFAO,,,,,you boys are getting sick in the head. looks like i need to drink a bottle of gray goose, smoke a joint, and go get fek'n nutzo trying to pump an aluminum 3.8 twin turbo GN motor in there. i CANT let you boyz have all the fun...

weeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee eeeee

[H204YOU]

LMFAO,,,,,you boys are getting sick in the head. looks like i need to drink a bottle of gray goose, smoke a joint, and go get fek'n nutzo trying to pump an aluminum 3.8 twin turbo GN motor in there. i CANT let you boyz have all the fun...

weeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee eeeee

Hey Dan,Let me have a hit off that I'll fly right over
and help ya shoehorn that mo-fo in there

[WFO]

LMFAO,,,,,you boys are getting sick in the head. looks like i need to drink a bottle of gray goose, smoke a joint, and go get fek'n nutzo trying to pump an aluminum 3.8 twin turbo GN motor in there. i CANT let you boyz have all the fun...

weeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee eeeee

http://www.pwctoday.com/showthread.php?t=67870

[Hydrotoys]

Any updates from down under?

[Vern]

This thread is both interesting and puzzling to me ... I love all the work on hybrids that is going on, but so far the only running skis I have heard of have been a number of RXP powered GPRs, one rotary powered GSX (Rexx), and a couple Merc 2.5 EFI powered skis. I think the reason Mark and others have actually produced a number of running skis is the motors and setups they chose were marine engines, with marine computer/electronics/fuel pumps, etc, had the output shaft low (no gear or belt drive needed) for a standard direct connection, and they already had water jacketed exhaust.

I love hearing about built, powerful engines, but it seems to me that is the relatively easy part. I think the really big hurdles will be fabricating water-jacketed exhaust, the engine to pump drive mechanism (and mounting it securely in the hull), integrating engine control with fuel pump and the fuel tank, and to a lesser degree setting up and controlling engine cooling. Strictly my opinion, but to me those are really big hurdles.

All the above are why I would still bet that getting a finished, fast, reliable ski on the water will be cheaper using an existing PWC engine rather than using a car-based engine ... there is far more custom work and fabricating to be done and that does take time and money.

I am lined up with everyone else, waiting to hand out high-fives and kudos as soon as the rotary and/or Honda powered skis are done, but I am wondering when these hybrids will actually be on the water?

[Hydrotoys]

Exactly why I chose the RXP engine and am keeping my eye open for the next marine engine for a gpr.