Boy,
did I just hear some wind going out of many folks sails. I somehow doubt 66 is going to generate many stock craft sales.

Thanks for being honest at least.

Was this a full tank run, or your standard half-tank radar runs?

7850? Seems a little low. I wonder if they have the same "overfull" oil issues that the Seadoo's have?



'05 RXT STG I + RR s/c -71.5 (more to come)
'04 RXP STG III w/B kit 81.8- (NJ Shootout 2006)/ 80.5 untuned- (MB II 2006)
'02 XP - 61.9 stock -wife
'01 Gpr 1200 Stg II - sold!


http://www.windmillhotdogs.com/

All of our testing is performed the same every time. 1/3 tank of fuel and trim in neutral position where applicable.

BDNJ - Why do you feel 7,850rpm is too low? Just curious.

BDNJ... you are prob wondering why the Kawasaki makes More power than the Sea-Doo RXP at Less RPM. Both engines have almost exact same displacement.

The answer is simple: The Kawasaki makes significantly more torque. Horsepower = torque x a given RPM. Just look at a Dyno-graph.

wow 66 is a huge let down my intrest just went way down .

i thought one went 69 at dream demo .

.

I can understand why some, or most, are disappointed by the stock performance #'s. Since the annoucement of a 250HP Supercharged engine in a new hull there have been high expectations. Some maybe too high!

We've spent some time on the new Ultra on our flat test lake and in the ocean in rough conditions. While the Ultra 250X may not "shine" as expected on flat water, it most definitely excels in the rough stuff. It's very stable. No unpredictable drifting (aka hunting). And when you're running across sets of waves the nose stays fairly level. This allows you to maintain speed with confidence.

We're convinced that when it comes to riding in rough conditions the Ultra 250 is definitely the craft to have.



Oh, and don't forget, the Ultra 250 offers a lot of storage, reverse, easy reboarding, etc, etc!

This message has been edited. Last edited by: RIVA CREW,

quote:

Originally posted by RIVA CREW:
All of our testing is performed the same every time. 1/3 tank of fuel and trim in neutral position where applicable.

BDNJ - Why do you feel 7,850rpm is too low? Just curious.

RC: I could have sworn that the Ultra was set up with higher strength internals to turn 8000+ rpms. Unfortunately, I cannot recall where I read that. I will look again.

Brendan



'05 RXT STG I + RR s/c -71.5 (more to come)
'04 RXP STG III w/B kit 81.8- (NJ Shootout 2006)/ 80.5 untuned- (MB II 2006)
'02 XP - 61.9 stock -wife
'01 Gpr 1200 Stg II - sold!


http://www.windmillhotdogs.com/

excell must be great! but im kind of dissapointed to hear 66. afterall in watercraft world dream demo 69.2 was posted as the highest run. it sounds like a great piece of machinery,but it seems too big and heavy, i'll stick w/ my 15f and use the 2k i would have used to upgrade to the ultra to endurance for my 15.

RC: Page 32 of the January Watercraft World Ultra article says "At the engine's core is the same long-stroke, 1498 cc mill shared by the STX-15F, now tweaked to have a lower compression ratio (7.8:1) in order to minimize detonation at high-boost pressures. Redline also has been increased to 8900 rpm."

Typo?

Brendan



'05 RXT STG I + RR s/c -71.5 (more to come)
'04 RXP STG III w/B kit 81.8- (NJ Shootout 2006)/ 80.5 untuned- (MB II 2006)
'02 XP - 61.9 stock -wife
'01 Gpr 1200 Stg II - sold!


http://www.windmillhotdogs.com/

Keep in mind that when Dream Demo was held it was cold here in Florida (that's right, cold!). When we received our first Ultra 250X and tested it the weather was significantly warmer, more so than it was for Dream Demo and for this time of year in general. We all know that heat is the enemy with these supercharged 4-strokes. Look at the difference in #'s with RXP's & RXT's. A mere 5-degree change in temperature will rob the engine of power resulting in noticeable losses in speed.



We don't have any specific technical information to support or refute the article in WW. And we have yet to put the engine on our Dyno. The article reads that "redline was increased to 8,900rpm". I interpret that to mean the highest capability with the stock ECU, not necessarily the targeted operating RPM. Some may think I’m wrong (again), but that is how I read it.

I read elsewhere that the Kawi produces the peak hp @ 7750 rpm. So go figure. :/<:


'05 RXT STG I + RR s/c -71.5 (more to come)
'04 RXP STG III w/B kit 81.8- (NJ Shootout 2006)/ 80.5 untuned- (MB II 2006)
'02 XP - 61.9 stock -wife
'01 Gpr 1200 Stg II - sold!


http://www.windmillhotdogs.com/

i think sales will take off.

RC has a sales winner i hope... you guys are nutz, imo...66 in the chop is gonna kill everything out there, in the rec world, stock class. And i think it'll be 66 in the chop for this beast.

Then mod the ride plate, and...

Just a comment about the Dream Demo speeds. They are typically higher than anyone else's Magazine or otherwise on stock craft. It has been pointe dout thatr dream demo will test preproduction boats whereas PWI waiots until thiwer boats can be purchased off the shelf just like a consumer. That way, you get what anyone else can get with no specail tweaks from the factory. I wonder if anyone herre remembers the Dream Demo Ultra?? 69mph I believe. No production models did that speed. Same with abnormally high numbers for the Polaris Pro 785. 3 mph more than PWI tests.

66 doesn't surprise me in the least. The manufacturers are still working under an informal agreement with the CG to limit stock speeds. Kawasaki does not want a repeat of the debacle that happened with ATV's twenty years ago when it went all the way to signing a Federal consent decree.

It is not hard for the mfg. to limit "stock" speeds on a craft and then let the aftermarket (Riva ) fix the problem. I suspect some combination of a pump wedge, impeller, rideplate will immediately bring the hull up and add 3mph to that top speed, putting the ski where it could have been stock.

From there, people will be faced with other modifications that will take a little more money and probably void some warranties.

I've got an 06 GPR that has just a prop, pump seal and Riva rideplate that has seen 70 on the GPS but it can't run with an RXT, either in acceleration or rough water so the 70mph does me little good in the real world while that 66mph RXT kills me everytime. That same RXT usually kills the RXPs here in very rough water.

You can either be king of the radar gun or king of the lake, usually not both in stock condition. I think (hope) the Kawi wears the crown for king of the lake and if Riva puts out some easy mods that gets me closer to 70mph, so much the better.