Chain case life Gen 5

[caper11]

Your "feel" comes from torque and no initial restriction from the turbo as it is bypassed early. This is a very good design on a 2 stroke.

I am talking top end between the Boost and the G5. It was obvious between the two.

The boost has about 171- 172hp.

 

[Teth-Air]

HP is as deciding factor as torque, weight, rolling resistance, clutching, track, snow pack, etc. And with G5 doo has hit the home run as what comes to overall performace.

Boost has 8hp less than Turbo R just as Doo says. There are plenty of small dyno shops and you can see their results +- 20hp depending how dyno is calibrated and operated. Most of them have no proper knowledge or know-how and results are unreliable. When you put those sleds to certified dyno on the same day and then you will get those realistic numbers.

Sorry, not buying BRP's marketing propaganda especially when this is the trail version that has to have the water/methanol to maintain their numbers. There are real reasons I'm not buying it. The Boost has a bigger bore and shorter stroke. This bigger bore will allow for higher RPM and this dyno chart shows both the Doo and the Polaris flattening out in power at the same RPM. Polaris makes its big power above the RPM Doo makes their power. This and higher boost pressure will make more power on a dyno. BRP claims 180 HP. which is about 8 HP higher than Polaris's NA motor at sea level. Are you saying the Boost version makes no extra power over the NA version? More likely than not, htis dyno chart on the BRP video is comparing a heat soaked Boost motor compared to the methanol cooled Doo motor. If Doo did not have something to gain with methanol they woul dnot have designed a system with it. Now you compare combined with the mountain sled weight to brag about best "power to weight"? I don't htink anyone will buy that arguement.

I mountain ride at 1500-4000' most of the time. The boost does not even come close to the turbo r. I'm pulling 10-12 mph over any boost in the group on the top end, and get out the hole way faster. The turbo r also gets the 9r from dig evey time. I jumped to doo last year, and we have 3 more in the group selling the boost for doo turbo r. The boost with 20hp tune from bikeman or ibexx still can't out run a stock doo turbo r.. I had a boost in 22 and had a 9r for 3 weeks later season to see what's its all about.

Maybe so but I have 2 friends I ride with that have identical turbo r sleds. One sled is much faster than the other. What does this say? One has poor clutching I suppose? Now when comparing to a Polaris how many other things are different that could explain your findings other than HP? This is starting to sound like a conversation from 2019 when the Polairs 850 NA would beat up on the Ski-doo 850 G4 turbo in a race and the Polaris clearly had less power.

 

[Teth-Air]

I am talking top end between the Boost and the G5. It was obvious between the two.

The boost has about 171- 172hp.

I would believe 171-172 HP for the Boost after it was heat soaked and the ECM pulled the power. Back to NA, sea level power. I think this thread was about failing drive chains? Or not?

 

[caper11]

I would believe 171-172 HP for the Boost after it was heat soaked and the ECM pulled the power. Back to NA, sea level power. I think this thread was about failing drive chains? Or not?

My G4 turbo made 166hp on a dyno in Edmonton. I think I would believe Doos HP claims when other manufacturers will not post their numbers, and leave it open to interpretation.

The trail version that has meth injection is not different from any other supercharged/turbocharged vehicle from the factory. Only a matter of time before doo turns up the wick on the summits HP and puts meth injection on a mountain sled.

I expected more from a sled that was tuned, clutched, just didn’t have it and the trackspeed numbers showed it.


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[Teth-Air]

Will be intersting to see if the Boosts will beat up on the Doo's this year now they have a competitive track for that kind of power. It may take more than that though as the clutching and gearing have not been ideal.

 

[Driver]

Sorry, not buying BRP's marketing propaganda especially when this is the trail version that has to have the water/methanol to maintain their numbers. There are real reasons I'm not buying it. The Boost has a bigger bore and shorter stroke. This bigger bore will allow for higher RPM and this dyno chart shows both the Doo and the Polaris flattening out in power at the same RPM. Polaris makes its big power above the RPM Doo makes their power. This and higher boost pressure will make more power on a dyno. BRP claims 180 HP. which is about 8 HP higher than Polaris's NA motor at sea level. Are you saying the Boost version makes no extra power over the NA version? More likely than not, htis dyno chart on the BRP video is comparing a heat soaked Boost motor compared to the methanol cooled Doo motor. If Doo did not have something to gain with methanol they woul dnot have designed a system with it. Now you compare combined with the mountain sled weight to brag about best "power to weight"? I don't htink anyone will buy that arguement.

Maybe so but I have 2 friends I ride with that have identical turbo r sleds. One sled is much faster than the other. What does this say? One has poor clutching I suppose? Now when comparing to a Polaris how many other things are different that could explain your findings other than HP? This is starting to sound like a conversation from 2019 when the Polairs 850 NA would beat up on the Ski-doo 850 G4 turbo in a race and the Polaris clearly had less power.

Methane is for trail riding and its very well explained by brp why its needed. Mountain sleds dont need this system and its not very difficult understand why.

Doo has one huge technological advantage, and that is direct fuel injection. As long as Pol doesnt have this technology, they wont be able to match doo performance. Enviromental legislation makes the modern sleds run very very lean. Its not just about the bore and stroke, its not that simple. If it was, those old day big blocks would be more powerful than modern day engines but they are not. If the Boost was the most powerful 2-stroke out there, Polaris would not be shy to put out hp numbers. But now they are just talking about % which is quite lame. Doo says that Turbo R is the most powerful 2-stroke out there, and Polaris isnt denying this claim. If they could they would.

It seems that you are not willing to accept facts that Doo engine is more powerful, both torque and hp. Boost is getting smoked on both dyno and on the field.

Your other friend should get his sled checked, probably faulty injector/ecu or reeds.

 

[Driver]

Will be intersting to see if the Boosts will beat up on the Doo's this year now they have a competitive track for that kind of power. It may take more than that though as the clutching and gearing have not been ideal.

Lots of Boost riders did install G5 tracks to their Boosts last season, but that didnt change the outcome.

 

[damx]

I had a gen4 doo track on my 22 boost.

 

[caper11]

Lots of Boost riders did install G5 tracks to their Boosts last season, but that didnt change the outcome.

Got them closer to the door with doo parts tho.


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[kanedog]

Sorry, not buying BRP's marketing propaganda especially when this is the trail version that has to have the water/methanol to maintain their numbers. There are real reasons I'm not buying it. The Boost has a bigger bore and shorter stroke. This bigger bore will allow for higher RPM and this dyno chart shows both the Doo and the Polaris flattening out in power at the same RPM. Polaris makes its big power above the RPM Doo makes their power. This and higher boost pressure will make more power on a dyno. BRP claims 180 HP. which is about 8 HP higher than Polaris's NA motor at sea level. Are you saying the Boost version makes no extra power over the NA version? More likely than not, htis dyno chart on the BRP video is comparing a heat soaked Boost motor compared to the methanol cooled Doo motor. If Doo did not have something to gain with methanol they woul dnot have designed a system with it. Now you compare combined with the mountain sled weight to brag about best "power to weight"? I don't htink anyone will buy that arguement.

Maybe so but I have 2 friends I ride with that have identical turbo r sleds. One sled is much faster than the other. What does this say? One has poor clutching I suppose? Now when comparing to a Polaris how many other things are different that could explain your findings other than HP? This is starting to sound like a conversation from 2019 when the Polairs 850 NA would beat up on the Ski-doo 850 G4 turbo in a race and the Polaris clearly had less power.

Teth-Air anger is off the chain(case). haha

 

[Teth-Air]

Methane is for trail riding and its very well explained by brp why its needed. Mountain sleds dont need this system and its not very difficult understand why.

Doo has one huge technological advantage, and that is direct fuel injection. As long as Pol doesnt have this technology, they wont be able to match doo performance. Enviromental legislation makes the modern sleds run very very lean. Its not just about the bore and stroke, its not that simple. If it was, those old day big blocks would be more powerful than modern day engines but they are not. If the Boost was the most powerful 2-stroke out there, Polaris would not be shy to put out hp numbers. But now they are just talking about % which is quite lame. Doo says that Turbo R is the most powerful 2-stroke out there, and Polaris isnt denying this claim. If they could they would.

It seems that you are not willing to accept facts that Doo engine is more powerful, both torque and hp. Boost is getting smoked on both dyno and on the field.

Your other friend should get his sled checked, probably faulty injector/ecu or reeds.

It's time you went looking for the dyno results of both motors from independant shops. Also you are relating direct injection to making power but you should learn that Doo does not rely on direct injection to make power, they use old fasion port injection, just like Polaris, when on boost.

 

[Teth-Air]

Teth-Air anger is off the chain(case). haha

Never angry when the subject is sledding, only enjoy the discussion. I might challenge some, based on experience or opinion, but often I learn myself when new facts come to light. I have flip-flopped on many viewpoints over the years because someone challenged me and had better science or real life experience to back it up.

 

[caper11]

Anyone get the update kit yet and get a pic?


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[jcjc1]

Anyone get the update kit yet and get a pic?


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wondering the same but it seems most posts regarding it mentioned dealers doing this mid october or so. i'm interested in seeing what people are being told that have upgraded on their own.
just saw this yesterday, this guy has a cool channel and he mentions the high number of chain case failures that he's seen starting at 20:10.

 

[Driver]

It's time you went looking for the dyno results of both motors from independant shops. Also you are relating direct injection to making power but you should learn that Doo does not rely on direct injection to make power, they use old fasion port injection, just like Polaris, when on boost.

Show me at least result from same dyno what shows that Boost has more peak HP than Turbo R?

 

[Driver]

wondering the same but it seems most posts regarding it mentioned dealers doing this mid october or so. i'm interested in seeing what people are being told that have upgraded on their own.
just saw this yesterday, this guy has a cool channel and he mentions the high number of chain case failures that he's seen starting at 20:10.

This guy even doesn't know what chain gen5 is running so I would not trust his "expertise". It was not a "new chain" but old Rexnord.

 

[jcjc1]

him seeing G5 chain cases failing doesn’t really have anything to do with expertise. they are failing, hence the recall. that he stated the wrong type of chain really doesn’t matter.

 

[Teth-Air]

Show me at least result from same dyno what shows that Boost has more peak HP than Turbo R?

Plenty of the Boost making more than 180 but can't seem to find any dyno results of the G5. Maybe it is making way more than Ski-Doo claims? Bikeman did dyno the G4 and the results were close to what Ski-Doo claimed so should we trust their results for the Boost?

 

[10003514]

Anyone get the update kit yet and get a pic?


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Mine was done Friday, dealer just received parts this past week. My chaincase was rebuilt in May under warranty but still replaced chain and gears again. Dealer told me there was another gear update after they fixed my sled in May.

 

[caper11]

Bikemans dyno reads high, and I have only seen a 2020.5 doo turbo done.


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