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View Full Version : What does 10,000 RPMs in a boat get you?



Havasu Hangin'
02-27-2006, 05:15 AM
120 MPH (http://www.xtremerotaries.com/boatvideo/roh_boat_3.wmv)...if it's a turbo rotory motor in an Aussie ski race boat.

Jbb
02-27-2006, 05:31 AM
nice whistle.....

RiverOtter
02-27-2006, 05:35 AM
Dam! Talk about needing ear plugs. I'm surprised that a rotary has enough torque to be a boat motor. Guess the turbos help a bit :220v:

Flying Tiger
02-27-2006, 06:14 AM
Were the Rotarys Apex seal problems ever corrected?

Tom Brown
02-27-2006, 06:20 AM
Were the Rotarys Apex seal problems ever corrected?
Yes. Long, long ago.

h2oski2fast
02-27-2006, 07:59 AM
Interesting! HH do you have a link to more info on that boat? The tach was an 8K tach and was only runinng 7K in that vid. That sounds awesome.

sorry dog
02-27-2006, 08:19 AM
Too bad it isn't an outboard. Roland needs a 4 stroke to fish those "green" california lakes.

desertbird
02-27-2006, 10:07 AM
http://www.xtremerotaries.com/

Havasu Hangin'
02-27-2006, 08:31 PM
Check out the acceleration at the end of this video (http://www.xtremerotaries.com/main2/Quicksilver/60-102mph.wmv).
:supp:

HMF'er
02-27-2006, 08:36 PM
Check out the acceleration at the end of this video (http://www.xtremerotaries.com/main2/Quicksilver/60-102mph.wmv).
:supp:
Wow, I want one of those engines.......in a SeaDoo.

FLEA DIDDY
02-27-2006, 08:40 PM
Check out the acceleration at the end of this video (http://www.xtremerotaries.com/main2/Quicksilver/60-102mph.wmv).
:supp:Ha Ding! checked the fock out.

Tom Brown
02-27-2006, 08:48 PM
2 liters of displacement... 800 hp. lol! :D

YeLLowBoaT
02-27-2006, 08:53 PM
Sure sounds like they are putting a sh*t load of boost in that thing.

wsuwrhr
02-27-2006, 09:04 PM
Yes. Long, long ago.
Yea, for $800 EACH for a ceramic seal. Each, as in three each per rotor.
At least that is what I remember the big boys having to run.
Brian

Tom Brown
02-27-2006, 09:10 PM
Yea, for $800 EACH for a ceramic seal. Each, as in three each per rotor.
At least that is what I remember the big boys having to run.
Brian
I don't know where you're getting your stuff but you can get a fresh 13b rotating assembly from MazdaTrix for about $4500 CDN.
If you need seals, PM me and I'll find out where we had ours done. It was way less than the price you cite and that was installed.
20b eccentric shafts are a little spendy, as are the carbon fiber intakes, light weight end plates, etc. ... as are any of the trick pieces for any engine. The base engines are cheap power, though. :cool:

wsuwrhr
02-27-2006, 09:14 PM
I've never personally messed with rotaries, though I have hung out with a couple guys that were into them.
I seem to recall they were pretty pissed off that you had to spend that kind of money to seal the cylinders, with any longevity, when "on the boost."
Brian
I don't know where you're getting your stuff but you can get a fresh 13b rotating assembly from MazdaTrix for about $4500 CDN.
If you need seals, PM me and I'll find out where we had ours done. It was way less than the price you cite and that was installed.
20b eccentric shafts are a little spendy, as are the carbon fiber intakes, light weight end plates, etc. ... as are any of the trick pieces for any engine. The base engines are cheap power, though. :cool:

Tom Brown
02-27-2006, 09:20 PM
I seem to recall they were pretty pissed off that you had to spend that kind of money to seal the cylinders, with any longevity, when "on the boost."
What kind of pressure were they running? I've never built a turbo engine but I know a stock turbo engine will handle 15 psi with little problem.
I can't imagine building a big block that will take serious pressure for anywhere near as cheap as a rotary. I'm not saying the rotary is perfect for all applications but they spank out a cost versus horsepower ratio that is pretty tough to compete against.
They have a power to weight ratio that's tough to compete with too. In fact, I'm pretty sure they have the best power to weight ratio of any liquid cooled engine in their power range. There are some air cooled engines that best them, though.
I've found the people who really dislike them tend to have never owned one ... or worked on one... or even spent much time looking at one or riding in something rotary powered.

FLEA DIDDY
02-27-2006, 10:33 PM
Back in the late 90's I had 2 rx-7's. rotories love n2o and also boost, they can take a shiat load in stock trim and run really well. If the seals went you could get a salvage engine for less than the cost of having seals replaced.

RiverDave
02-27-2006, 10:39 PM
Is it just me or does this look like a stock bravo with no external steering on it in this picture?
http://www.xtremerotaries.com/main2/Quicksilver/Lge%20pics/Sthn%2080%20parade.lge.jpg
Am I missing something here?
RD

RiverDave
02-27-2006, 10:44 PM
Just read the magazine article on it. It's a bravo 1 "direct drive." (Never heard of a direct drive Bravo?) They say though they are going to be changing the drive line though becuase they want a gear box do to the lack of torque on start up until the turbo spools.
RD

h2oski2fast
02-27-2006, 11:08 PM
Just read the magazine article on it. It's a bravo 1 "direct drive." (Never heard of a direct drive Bravo?) They say though they are going to be changing the drive line though becuase they want a gear box do to the lack of torque on start up until the turbo spools.
RD
Direct drive is how most Bravos are setup. The difference here is that there is a longer drive shaft between the motor and drive (like would be done in a staggered motor application). Also there is hydraulic steering on the boat, but it is on the inside. Essentually like a cable over hydraulic setup. Aussies dont like to add any weight to their race rigs. That's why this boat is so fast, even with 600+ ft/lbs of torque. Bullets are very fast boats and light boats, as most are built with outboards.

ROZ
02-28-2006, 12:13 AM
Direct drive is how most Bravos are setup. The difference here is that there is a longer drive shaft between the motor and drive (like would be done in a staggered motor application). Also there is hydraulic steering on the boat, but it is on the inside. Essentually like a cable over hydraulic setup. Aussies dont like to add any weight to their race rigs. That's why this boat is so fast, even with 600+ ft/lbs of torque. Bullets are very fast boats and light boats, as most are built with outboards.
Is the Bullett or the Cyclone available in the states?
I love them damn things!

RiverOtter
02-28-2006, 04:36 AM
Check out the acceleration at the end of this video (http://www.xtremerotaries.com/main2/Quicksilver/60-102mph.wmv).
:supp:
Holy Cow!!!

h2oski2fast
02-28-2006, 08:02 AM
Is the Bullett or the Cyclone available in the states?
I love them damn things!
There is only one Bullet that I know of in the states, it more than likely will be pulling in the Parker Marathon ski race. Randy Davis, owner of Prime Marine and now Nordic Boats, had been importing the Cyclones. There are quite a few Cyclones running around. They are a drivers boat and a handfull to drive, from what I have heard.

INSman
02-28-2006, 08:12 AM
Check out the acceleration at the end of this video (http://www.xtremerotaries.com/main2/Quicksilver/60-102mph.wmv).
:supp:
damn !!!!!!!!!!!! :220v: :cool:

H20 Toie
02-28-2006, 08:33 AM
holy crap !!!!!!!!!!!!