And to be fair, DT says the oem pc can detect a controller to void the 4 year warranty? Hopefully I didn't go to far with Jims info.

 

With a bullydog or similar controller I can see that but I dont know how it would detect an inline controller.

 

167.6 at 8100 rpm to be exact after only a few pulls still in break in mode. I would kind of be suprised if dynojet even makes a PCV for this sled they are pretty much obsolete with ecu programmers now

 

Are you sure it was still in break in mode when they got these results?

 

I was leaving out a little info since Jim asks for not too much info not to be posted.

 

Was that first run or after several break-in runs?

 

They did like 80 passes on the Engine. As I said its 167 and 172 with it leaned out.

 

I read Set in full power setting.(premium, non ethanol )
Torque 109,12.6 air fuel ratios.

 

I'm excited to try this sled when snow flies. I won't bother voiding 4 yr warranty to gain the 6 HP.

 

167... nice! I’m good with that for sure!

 

They way I read it, it was out of break in mode.

 

That's the way I read it also - "After the engine breakin was complete ..." The engine was run on the dyno at wot until the rings were seated and the Hp stopped to climb for a 5-6 Hp gain. However it isn't clear if this was enough to clear the beakin chip (using the term loosely), but the Polaris engineers brought with them an ECU with the breakin mode turned-off to ensure the Engine Management was set to deliver the maximum power that new 2019 Patriot 850 owners can expect out of their sleds after breakin.

 

You guys are lucky to have the octane switch for a lean vs safe map. I hope one day Ski-Doo comes out with Econo/Sports modes like they do with the 4 strokes.

 

Hey 167 is good! And that's alot of torque too!

 

Was Poo claiming a 9hp or 9% gain over the 800 HO?

If 9% then the HO would only be 153-154 HP to put the 850 @ 167....I guess that is about right?

if you do the math, 5cc per 1 HP seems to be the safe avg. ratio of a modern 2 stroke sled engine....600, 800, 850...all pretty close.

 

was poo claiming a 9hp or 9% gain over the 800 ho?

If 9% then the ho would only be 153-154 hp to put the 850 @ 167....i guess that is about right?

If you do the math, 5cc per 1 hp seems to be the safe avg. Ratio of a modern 2 stroke sled engine....600, 800, 850...all pretty close.

see in bold^^^

 

167 is good. we put our 2018 on the dyno just to see how much and where it made the most torque/h.p. It pulled 158 three times in a row. Hot motor. And it is the quickest fastest Polaris stock sled we have ever had. They all vary some. no two sleds will ever dyno the same.

A few years ago and it was in the amateur class at Epping N.H. a 145 h.p. pro-r won every time it raced. Even in the 1000 stock class. It's not always about peak h.p. I'AM o.k. with 167 H.P. the 850 doo is 168 and it is a true 850 the Polaris is a 840 c.c. motor.

 

i see 174hp here ?

 

Where can I read the results and information you guys are talking about?

 

I believe you need to subscribe (pay) at Dynojet's website. It's one way they keep the doors open I guess. Or wait a day or 2 and it will show up in someones sig.....LOL

 

And does it really matter if it comes in 1-2hp less than 850doo? No it doesn’t. Getting the power into motion is key and it seems poo has been very efficient at doing this.

 

Polaris clutching is top knotch. Just popped the cover off my primary @8000+ miles and besides a broken spring the assembly is damnear tight as new.

 

So as it stands now the guys who ordered the 850 are a bit disappointed at their measured dick size but there is talk of an enhancement that may get them to the porn sized wang they thought they'd be swingin this winter...is this close to fact or....?

 

Lol...there nothing wrong with having the 2nd highest HP 2 stroke on the snow.

 

Was told by a Polaris rep that they can detect almost any mods done to the 2015 and newer sleds within 2 minutes on DW.

IMO, this is believable because the ECU has numerous algorithms that detect most changes to things like rate of rpm increase, speed increase, detonation sensor activity, pipe temp, T-Map readings, etc. Autos already have these as well and can be used to deny warranty, find fault in accidents, etc.:bc:

 

Funny we had a sled blow up. 2015 and had a pcv, pipe, timing key, and it was 100% covered. After we took this all off. It had a bad TPS that caused it.

t-mapp sensor? Temp and manifold air pressure. no Fuel controller i know of changes this senor in any way? A clutch kit can change rate of rpm increase? They better take the comments about clutching out of the service manual if there going to deny warranty for that? It clearly states sleds may have to have gearing and clutching changes for certain area's of the country.

pipe temp and det. A dirty injector does the very same thing. And we clean ever injector when doing rebuilds. You would be surprised how many of these were dirty. And how many det codes were stored. One sled from M.E. a HCS member had his 2013 pro-r repaired twice under warranty. One injector was 15% flow restricted the other was 9%. Had like 40 det codes. Polaris apparently didn't catch that.

Now i agree if the sled was over heated, has numerous det. codes,etc. then absolutely warranty can be denied. MY extremely well tuned 600 pro-r has all kind's of mod's on it. Has only 6 det. codes from dialing the fueling in. And no over heat codes.It would be extremely hard for them to look at the ecu and determine what was done to it? It runs under the rpm it did from the factory.

 

lets not get hung up on one HP difference. Dynos vary and engines as well. The dyno pulls were made in what I consider warm air. I wonder what it will make down at 10degF. I don't think you guys are gonna have any trouble with mustard bucket crowd!

 

I guess you missed in the write up that dyno pulls are made with refrigerated dry air.

 

From tests I have read, I think the 850 owners are going to be impressed with how smooth this new engine is due to its mounting system.
Smooth, light, powerful and hopefully RELIABLE will hit the 4 stroke guys with a sled they can easily transition to.

 

Holy man its a bloody number ride the dam thing. Have fun.

 

Not bad, it’s 5-6% larger in displacement than the 800 and they got more than that out of it. If they run hard I’ll probably trade my 600 on one for everyday trail use and boost up the turbo to race gas only.

 

90% of you guys will never use the HP it can attain anyways. too old and scared. But if it has 850 on the side when you pull up to the bar or warm up shack, at least it will make your dick look bigger than the others.:stirthepot:

 

Sure does, I see ya gotta lil' 8 there huh? Take a note 'er two & watch how I handle all the chicks in the bar....:bc2:
I been a Cat rider forever so I'm GOOD at that.

 

Jim clarified on FB it was out of the break in mode. He feeds the sleds 30F cold air to simulate winter time temps. The density altitude of the runs was -600ft. That's about as good as it's gonna be without leaning it down.

 

Jim clarified on FB it was out of the break in mode. He feeds the sleds 30F cold air to simulate winter time temps. The density altitude of the runs was -600ft. That's about as good as it's gonna be without leaning it down.

He stated that it was out of the ECU breakin mode? Or that the engine was fully broken in? This is two different things. IMO, he didn't run the engine long enough to get to the ECU cutoff point. The fuel flow and A/F ratio indicates it was still overly rich compared to similar Polaris 800, Doo 850 and Cat 800 C-Tec Dyno runs.

 

Polaris is lighter than Doo's are, which will be very noticeable.[/QUOTE]

Not with an extra 3 gallons of fuel they're not.

 

Not with an extra 3 gallons of fuel they're not.

xc 840 is 460lbs dry with a 12 gal tank

mxzxrs 850 is 495lbs with a 9.5 gallon tank
https://www.ski-doo.com/content/dam...ntent/dam/ski-doo/Global/MY2019/Documents/Spec-sheets/English/2019-MXZ-X-RS.pdf

gallon of 'gas' weighs 6.3lbs

xc full of gas 535.6lbs

mxzxrs full of gas 554.85lbs

it's just math

if they were full of water instead of fuel

xc 560.8lbs

mxzxrs 574.23lbs


now, if you filled the tanks with gold... :roflmao: