[ultrazls1]

Looks like maptun just released boost tunes. Clutched for 79-8000. 195-200 hp. Looks like pump gas. Maybe they figured it out or it’s crap

from what I gathered on google some of the mountain guys love maptun. Not sure if this is just for mountain boost or both

 

[patrioticinnovations]

If you load the sled to run 8100-8200 it will derate
That’s why the octane booster helps or some sort of way to boost octane
They should’ve named it octane boost lol
The factory clutching is higher because of this

Yes. DTR has many articles about how detonation is created and eliminated. I own a twin turbo 69 Plymouth Roadrunner with a .030 overbored 440, 8:1 forged pistons, high stall auto, mild RV cam, Rhoads adjustable lifters, 3.23 gears. I have adjustable boost and timing retard per lb of boost from in the car. It's easy to see what induces detonation or eliminates it. Talk about a sleeper.

 

[trdehmer]

What seems a bit off is the Sports Unlimited Boost out of break-in made 183.6HP at 8150RPM.

The HRSS Boost out of break-in made 190.2HP at 7900-7950RPM.

Something seems off IMO.

Same dyno for both at DTR. After 23 dyno pulls. 9R 170. Boost makes 20 more hp

View attachment 2143403

 

[ultrazls1]

What seems a bit off is the Sports Unlimited Boost out of break-in made 183.6HP at 8150RPM.

The HRSS Boost out of break-in made 190.2HP at 7900-7950RPM.

Something seems off IMO.

They explained it was because of miles on the motor. Which they also experienced with NA 850s. The HRSS boost had several hundred hard miles on it past break in . According to the article

 

[ultrazls1]

 

[patrioticinnovations]

Also, slight differences in boost pressure from sled to sled can account for some variation in hp. In the DTR tests done 2-8-2023 hp and boost was as follows:
Stock 190.2 hp @ 7900 and 3.0 lbs boost on 90.8 octane pump premium non ethanol fuel
Stage 1 206.4 hp @ 8100 and 5.2 lbs boost on same fuel
Stage 2 222.6 hp @ 8050 and 7.0 lbs boost on 100 octane fuel
Stage 3 240.5 hp @ 8150 and 9.4 lbs boost on 114 octane fuel

Retunes were done using Torque Link.

By comparison back in Dec 1991, I turboed the world's first 92 VMax 4 750 and had it dynoed at DTR. On pump 93 ethanol fuel, it made 199 hp at 7 lbs boost and 217 hp at 9 lbs boost. No race fuel. 4 small low compression pistons are much more forgiving than 2 big high compression ones.

 

[ultrazls1]

One could easily run 100 octane tune with carrying some boostane on board. With head mod that’s 230 hp. Trail friendly and realistic.

sounds good to me

 

[letsirkdor]

I would absolutely love to ride one of these at 225 ish hp. But, my bank account may not😁

 

[trdehmer]

Also, slight differences in boost pressure from sled to sled can account for some variation in hp. In the DTR tests done 2-8-2023 hp and boost was as follows:
Stock 190.2 hp @ 7900 and 3.0 lbs boost on 90.8 octane pump premium non ethanol fuel
Stage 1 206.4 hp @ 8100 and 5.2 lbs boost on same fuel
Stage 2 222.6 hp @ 8050 and 7.0 lbs boost on 100 octane fuel
Stage 3 240.5 hp @ 8150 and 9.4 lbs boost on 114 octane fuel

Retunes were done using Torque Link.

By comparison back in Dec 1991, I turboed the world's first 92 VMax 4 750 and had it dynoed at DTR. On pump 93 ethanol fuel, it made 199 hp at 7 lbs boost and 217 hp at 9 lbs boost. No race fuel. 4 small low compression pistons are much more forgiving than 2 big high compression ones.

Also note the fuel flow between recent Boost dyno tests. Way different, something seems a bit goofy to me...

 

[patrioticinnovations]

DTR tested the new 9R on 2-9-2023. 2 hrs breakin only made 161 hp. 23 plus dyno tests later it made 170 hp @ 8300 rpm. Each test seemed to gain hp. Very slow to break these newer 650-900 cc CF engines in.

 

[31cccat]

🤔
I’d rather have the 840 crank

 

[Lid2]

Inquiring minds want to know if guys are gonna be mad when 900 big bores based off an 840 punishes the 9r.

 

[31cccat]

It’s going to happen

 

[Lid2]

It’s going to happen

For sure . ESP. If that power number is indicative of the norm.

 

[letsirkdor]

Inquiring minds want to know if guys are gonna be mad when 900 big bores based off an 840 punishes the 9r.

I agree with this, but also want to remind everyone the 9r was not intended for flat land use, designed for different applications. And I honestly don't think Poo will deliver THAT 900 in a flatland sled, if they do it will be because people are asking and talking about it.
I think a quicker revving 170 HP sled would be a hoot, and I'd be interested in it, but agree an 850 with bigger jugs would be a better choice for the flatland segment.

 

[ExcursionPSD]

Anybody seen failures on the 9R bottom ends?

 

[Lid2]

Is it the same as 650 ? Or at least same oiling , seals , crank , journals etc. ?

 

[ExcursionPSD]

Differences and similarities are explained here:

MY23 Mechanical & Electrical parts changes

2023 March 21st Linked from Matryx FAQ MY23 Snow Polaris Online Parts website This is a very good overview of the MY23 Polaris engine lineup: MY23 Polaris Engine overview & details NOTE: Polaris uses the abbreviation 840T for the Patriot Boost engine. That is correct by cc displacement...

www.hardcoresledder.com

This is also linked in the reference section of the Matryx FAQ.

 

[31cccat]

Changes in case

 

[Lid2]

Do you know what they changed in cases ? Besides anything size wise to occomadate a 900.