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Scott 912 - 9.1" Two Stage with Trim

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Scott 912 - 9.1" Two Stage with Trim

Postby rockchuckar » Thu Sep 07, 2017 4:18 pm

It's been a long time coming but we have just finished 10 days of intense testing of the new Scott 912 ( 9.1 in. 2 stage ) I'll have some good solid figures and numbers for those interested in about a week once we get our graphs made but I can tell you that testing went very well and in fact exceeded our expectations which were set fairly high. Until then here are a few pictures of the prototype .


100_1201.JPG
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100_1203.JPG
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Re: Scott 912

Postby FlyLow » Sat Sep 09, 2017 8:47 am

How much does the test boat weigh?
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Re: Scott 912

Postby mgrant » Mon Sep 11, 2017 7:24 am

I can't wait to hear the results! :)
OutKast 24ft (self built). Fuel Injected 499 Max Wedge Mopar. Hamilton 212, impeller modified by Intermountain Machine & Fab (4.4t).
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Re: Scott 912

Postby rockchuckar » Mon Sep 11, 2017 11:47 am

Test boat was a 22 ft HCM with a LSA engine. Boat weighs 4500 . When we were testing we had 3 guys, 6 empty plastic 55 gallon drums , tool box, cooler of water , 1 inch pump ( to fill drums ) and 110 gallons of fuel on board . Once we got test results with that load we started filling up drums with water and tested again.
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Re: Scott 912

Postby callingalltheshots » Sun Sep 17, 2017 5:25 pm

Well done Gentleman
2006 HCM Granite HD 1703.5 hours
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Re: Scott 912

Postby rockchuckar » Mon Sep 18, 2017 4:16 pm

Here's a picture from testing. Full up trim with the barrels empty
HCM rooster tail.jpg
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Re: Scott 912

Postby mgrant » Mon Sep 18, 2017 5:14 pm

Nice!
OutKast 24ft (self built). Fuel Injected 499 Max Wedge Mopar. Hamilton 212, impeller modified by Intermountain Machine & Fab (4.4t).
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Re: Scott 912

Postby viking » Sat Sep 23, 2017 8:57 am

GPS comparison with other pumps in same boat?
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Re: Scott 912

Postby rockchuckar » Sat Sep 23, 2017 10:46 am

viking wrote:GPS comparison with other pumps in same boat?

We are working on those graphs right now. As soon as they are finished I will post them up here .
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Re: Scott 912

Postby Great White » Sun Oct 01, 2017 10:09 pm

New pump...can't wait to see the performance data.
21' Custom Weld WWS...LS3/212.
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Scott 9.1" - SWJ912 - Test results against Hamilton HJ212

Postby Scottwaterjet » Mon Oct 02, 2017 7:23 pm

Overview of 9.1" Two Stage WaterJet Testing- [Compared to Hamilton HJ212]

9.1” Two Stage WaterJet Development
Scott WaterJet is pleased to announce the development of our new 9.1” Two Stage WaterJet model SWJ912.
This new addition has been in development for the last 12 months, and we have just completed two weeks of intensive and very successful testing in Boise, Idaho, USA in an LSA powered 22ft Hells Canyon Marine Jet Boat.

The Challenge
To have a WaterJet (Pump) more suited, in the first instance, to the North American Jet Boat market.
In particular, the WaterJet must be capable of;
• Fully utilising the increased torque and horsepower of the more modern V8’s, in particular, the direct injected LS3, LSA’s, LT4’s and Raptor range to name a few.
• Pushing larger and heavier jet boats onto step (planing speed), with no loss of performance from cavitation.
• Providing great cruising speeds through the full engine rpm range.

All Great Ideas Have a Champion
Scott WaterJet distributor, Jeff Schlagel of Schlagel Marine and Motorsports, has been instrumental in bringing this WaterJet development to fruition. As a longtime supplier to the North American Jet Boat Industry, he could see that a WaterJet with more grip, more push, more lifting power, better load carrying, better-cruising speed, and ability to fully utilise the available capabilities of the modern V8 engine was needed. His strong belief and commitment saw Jeff purchase, and provide the test boat.

Ultimate Performance Goal
To Outperform a comparable WaterJet in this application.

Key Performance Critera
• Able to cope with the output of more modern, more powerful V8 engines.
• Have exceptional holeshot without cavitation.
• Provide huge load carrying capabilities.
• Efficient cruise speed at low rpm when loaded or unloaded.
• Excellent all round speed when loaded and unloaded.
• Massive low RPM push.
• Exceptional whitewater performance.

Key Design Criteria
• Retrofit/Mount into the same footprint as an HJ212 without alteration to jet or engine mounts.
• All the advantages of a Two-Stage design in the new unit.
• Trim control as a standard feature. Available at the driver's fingertips.
• Effective and efficient reverse with hydraulic cockpit control as a standard feature.
• Protective WaterJet Bash plate.
• Tough and durable construction.
• Easy to service and maintain.
• Intake clean out as standard.


Comparative WaterJet Testing

The Equipment
The test boat was a typical North American jet boat with the following configuration:
Hull - 22ft Hells Canyon Marine, 6 1/2 ft bottom, Cab forward with white water bow.
Engine - Marine Power LSA 6.2 l supercharged 540hp & 550 lbs-ft of torque.

[u]WaterJet - Original unit - HJ212 single stage[/u]
- 4KW Turbo impellor
- 4.25" (108mm) nozzle

WaterJet - Retrofit unit - Scott WaterJet 912 two-stage
- 19” std front Impellor, 19” pro rear impellor
- 4.88'' (124mm) nozzle (trimmable)

The Team
Jeff Schlagel
- Scott WaterJet Distributor, marine dealer, longtime experienced jet boater.
Konrad Scott
- Scott WaterJet founder, Chief Designer, Two times World Jet Sprint champion
- 40 years of jet boating experience, passionate about all things jet boating.
Richard Kallahan
- Engineer, Longtime experienced jet boater

The Goal
To confirm the Ultimate Performance Goal: “To Outperform a comparable WaterJet in this application”.

The Process
To confirm in a typical North American jet boat that we had achieved our Key Design and Performance criteria, therefore, confirming our Ultimate Performance Goal.
• Firstly, establish the performance of the Test Boat with HJ212.
• Have a controlled, consistent environment with repeatable test procedures.
• To ensure a true real-world test where the only variable was the WaterJet (Pump).
• Test from no load to high load.
• Determine the maximum load that can be lifted onto step.
• Ensure the retrofit met the criteria. Change the WaterJet from the HJ212 to the SWJ912.
• Repeat the test procedures with the SWJ912 installed.


The Results
The outcome exceeded our expectations with the 912 significantly outperforming the HJ212; providing more grip, more push, more lifting power, better load carrying, better-cruising speed, and ability to utilise the available capabilities of the 6.2l LSA fully.

Key Observations of the 912
Higher cruising speeds at the same rpm. More range. Less travel time.
Carry bigger load. More equipment to your destination and back.
Extremely resistant to cavitation under all load and throttle conditions giving confidence in big water.
Lifts 60% more load onto the plane and up to ~ 42 mph.
Lifted 3 Barrels more ~ 1,455 lbs more. [8 Barrels compared to 5 Barrels]

Test Result Sheets
There is a detailed test sheet for each of the following test scenarios.
Load Tests
• No Load
• 3 x 55 Gallon Barrels ~ 1,455 lbs
• 5 x 55 Gallon Barrels ~ 2,425 lbs
• 6 x 55 Gallon Barrels ~ 2,910 lbs
• 7 x 55 Gallon Barrels ~ 3,395 lbs
• 8 x 55 Gallon Barrels ~ 3,880 lbs
Cavitation Tests
• No Load
• 5 x 55 Gallon Barrels ~ 2,425 lbs
Attachments
1 9.1 Two Stage - Cover-page-001.jpg
3 9.1 Two Stage - 0 Barrels - No Load.jpg
4 9.1 Two Stage - 3 Barrels - 1455 lbs.jpg
5 9.1 Two Stage - 5 Barrels - 2425 lbs.jpg
6 9.1 Two Stage - 6 Barrels - 2910 lbs.jpg
7 9.1 Two Stage - 7 Barrels - 3395 lbs.jpg
8 9.1 Two Stage - 8 Barrels - 3880 lbs.jpg
9 9.1 Two Stage - Cavitation - 0 Barrels.jpg
10 9.1 Two Stage - Cavitation - 6 Barrels - 2910 lbs.jpg
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Re: Scott 912

Postby mgrant » Mon Oct 02, 2017 8:46 pm

Jeff, keep my name on that waiting list!! :-)
OutKast 24ft (self built). Fuel Injected 499 Max Wedge Mopar. Hamilton 212, impeller modified by Intermountain Machine & Fab (4.4t).
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Re: Scott 912

Postby tnairn » Tue Oct 03, 2017 12:34 pm

Just reading through this i am curious if you are utilizing the same intake block as the hj212 which would make it a awesome change over and a huge saving for consumers looking to upgrade.
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Re: Scott 912

Postby rockchuckar » Tue Oct 03, 2017 12:43 pm

tnairn wrote:Just reading through this i am curious if you are utilizing the same intake block as the hj212 which would make it a awesome change over and a huge saving for consumers looking to upgrade.

Yes you use the same intake block and the close coupler . Take the 212 out and drop the 912 in .
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Re: Scott 912

Postby rockchuckar » Tue Oct 03, 2017 12:44 pm

mgrant wrote:Jeff, keep my name on that waiting list!! :-)


Yes sir !
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Re: Scott 912

Postby 792 » Tue Oct 03, 2017 1:30 pm

Do you have any information on how the pump would perform with a 496?
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Re: Scott 912

Postby rockchuckar » Tue Oct 03, 2017 5:04 pm

No we do not . Seeing that both engines are similar in horse power range the differences between the 2 pumps should be similar as well.
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Re: Scott 912

Postby Fishbucket » Tue Oct 03, 2017 9:03 pm

That performance is very impressive. Does anyone know the cost to make the swap? Pump price?
Also, gotta ask...
Since this Scott is utilizing the same intake and stern penetration sizes. Would there be a "Scott like" impeller/nozzle combination modification for a 212 that would bring the 212 close to these performance numbers? I would have no problem installing Scott performance impellers in a grey pump.
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Re: Scott 912

Postby rockchuckar » Tue Oct 03, 2017 10:09 pm

Since this is the first one no one has done a swap yet but us. I figure a good shop could have it done in one day plus. We are still working on the price of the 912. I can tell you that we do not have any plans of making any impellers for the 212.
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Re: Scott 912

Postby Eagle1 » Tue Oct 03, 2017 11:42 pm

I want to drive it.


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