Not Average Joe Boost review

[TRS]

Struthers has a modified weight out for the P22 right now. I believe Bikeman has one as well.
I don’t know how much testing has been done with either one. Jack probably has more test time because of his close affiliation with Polaris.

https://bikemanperformance.com/media/catalog/product/cache/edd9d3e0080345c5553f3e95dc0a8e7e/p/o/polaris_boost_850_clutch_kit_2_1.jpg

 

[TRS]

I also checked the sheave angle of the p22 I have on the bench. It’s a 26* vs the AXYS 27*, that makes it an overdrive clutch.
Also, bad for bottom end performance.
I’m sure in time there will be more options after a year worth of testing.
There is the option to go back to the P85.

 

[volcano buster]

A great question too. How could we mitigate what you are describing with the new clutch? (problem currently is the clutch is starting shift out at a higher gear...)

Change the gearing? Is there a lower gearing option with the Q2?

 

[JeffBrines]

Change the gearing? Is there a lower gearing option with the Q2?

I don't think there is, though I'm sure the aftermarket will come out with something. Problem here is top end of the turbos are obviously high. My guess is (TRS knows best) the way the sheeve is grabbing the belt is causing part of the problem (some slip maybe?). Load is everything for a turbo setup.

 

[volcano buster]

Load is everything for a turbo setup.

While waiting for TRS to add inciteful input on the clutching side of the equation...

Since I know very little about turbo setups, I have a question: Is the fluttering sound from the exhaust the pulse input into the muffler from the two sources? The first source would be the exhaust gases coming from the turbo, the second being the gases being routed through the waste gate purging pressure? If this flutter comes from the waste gate valve opening and closing very quickly to maintain a certain pressure that the ECM requires, is there a chance that the mix of components are not exactly size matched for the engine needs? I'm curious if the turbo is slightly too large creating too much pressure requiring it to burp that off and being bigger may add to bottom end bog. Now back to the clutching side, I think one has a direct relationship to the other here. Fire away!

 

[JeffBrines]

While waiting for TRS to add inciteful input on the clutching side of the equation...

Since I know very little about turbo setups, I have a question: Is the fluttering sound from the exhaust the pulse input into the muffler from the two sources? The first source would be the exhaust gases coming from the turbo, the second being the gases being routed through the waste gate purging pressure? If this flutter comes from the waste gate valve opening and closing very quickly to maintain a certain pressure that the ECM requires, is there a chance that the mix of components are not exactly size matched for the engine needs? I'm curious if the turbo is slightly too large creating too much pressure requiring it to burp that off and being bigger may add to bottom end bog. Now back to the clutching side, I think one has a direct relationship to the other here. Fire away!

Most of what you are going to hear is "compressor surge". As far as I know there is no blowoff valve on the polaris boost buggy. Hence, when the throttle body closes shut, there is a pressure differential. As we all know, pressure will always try and equalize (go from high to low), so if the pressure on the backside of the turbo is less than on the front of the turbo, the air will literally reverse direction in the charge tube and blow past the turbo causing significant air turbulence and the compressor wheel to slow. This is the audible sound you are likely hearing.

The other sound is either the turbo spooling (we all know that one) or the exhaust passing around the turbo (which is a pretty similar sound to most people's ear; a whistle of sorts, though lower pitched).

Before you ask, compressor surge can effect the longevity of your center section (bearings) in a higher boost and higher mileage setup (like a car). In a low boost (sub 10) application where the total mileage is going to be measured in 4 digits, its not all that material.

 

[damx]

From a dead dig, yes the boost has a bit of leg. But so does the turbo doo, if you compare them back to back to the same brand of n.a. once your moving the boost has such a smooth power delivery, almost electric feel. Easiest turbo to ride in the trees.

 

[JeffBrines]

From a dead dig, yes the boost has a bit of leg. But so does the turbo doo, if you compare them back to back to the same brand of n.a. once your moving the boost has such a smooth power delivery, almost electric feel. Easiest turbo to ride in the trees.

Good feedback. Keep it coming. Few buddies I trust sent me some video, its got lag but their latest (out of break in) the sled seemed pretty damn responsive to me. Requires an aggressive rider but they had nothing but good things to say.

 

[live2beel]

Damx, nice to hear something positive for a change. Of course it’s not going to be perfect on the first year. Or maybe second?. They deserve some kudos for making something that we all thought would never exist.

 

[goridedoo]

The on throttle noise is the sound I’m referring to.

Making sense now, I just remembered they are dumping pressure right out the side of the pipe, and I believe that remains completely separate to the outlet?

Pretty much exactly what you said in the first post, just taking some time to wrap my head around how it works and sounds differently from current aftermarket turbos.

I took a crappy screen shot of an exhaust can cut-away off youtube to try to illustrate this a little better.

The exhaust can has two different chambers, one pre turbo, that is dumping exhaust out the side of the pipe via an electronic wastegate, and one post turbo, which is the same as any other turbo sled. The two exhausts remain completely separate all the way to the outlet (I remember seeing a picture of the outlet on here last spring).You are getting constant exhaust out the post turbo side, and intermittent exhaust from the electronic wastegate that is basically constantly cycling to dump pressure and regulate boost.

A constant braap out one side of the outlet and a braap braap braap braap out the other side, all happening at the same time, making for a sound that atleast to me sounds very similar to a rev limiter.

 

[damx]

Its a turbo, if your not an aggressive rider, you will be a better rider on a n.a. sled. We see it all the time. Ride it aggressive and it will reward you, ***** foot around it will fight you all the time.

 

[turboless terry]

So even though chadly is an expert rider you don't think he is being aggressive enough?

 

[06 Dragon]

I am currently in the market for a new turbo sled. Sold both of my previous after market turbo sleds, one four stroke and one turbo pro Rmk. I went out to Revelstoke just before Christmas for a three day trip and wanted to rent a Matryx boost but none were available for rent as everyone knows due to delays in delivery to the dealerships and their customers. So I ended up renting a 2022 skidoo summit x 165 X3” track. The sled only had 2.8 km on it when I picked it up. So still in break in.
I was very impressed with the throttle response. It was like a N/A, zero turbo lag! It Had good power. As we went up in elevation you could hear the turbo start to spool up. Once up into the alpine it held the power consistently. I have not rode a doo since the rev chassis so it took a little getting used to and the T motion threw me off a bit, but I would say that doo has their turbo set up dialed in pretty darn good right out of the box.
Our group along with some others, a mix of doo and Polaris riders all took turns riding it making comparisons through out the days of our trip. The Polaris 850 N/A riders thought their sleds maybe a little crisper right off the bottom end. Another did not really like the doo chassis. Both guys are loyal Polaris riders. The doo riders in the group really liked it. The guys who had the exact same sled gen 4 only N/A with a 165 X 3” track summit X said that there is definitely a power difference and really enjoyed the sled. They did not want to switch back. The other couple of guys in our group were riding gen 4 850 N/A 175 X 3” doos. They also commented they said definitely a power increase in the turbo and also commented on how they could not believe the zero lag from the turbo. Also great track speed. Just that on their 175’s they could tractor around slower in the deep snow and not trench as bad compared to the 165 T doo.
This is just the opinions from various riders during our trip. I my self would have no problem owning one.
On our next trip out hopefully there will be a Matryx boost available and we will also rent a new t doo again and can make some more on the mountain side by side comparisons along with some video footage. Also a good friend has a 2021 T doo with a 175 x3” all stock engine, and exhaust only has some clutch and suspension work, will hopefully be coming along or he said that we can borrow his as well
So it will be interesting.
I hope the Matryx boost impresses me as much as the doo.
As I said I am in the market for a new sled and just trying to make a fair comparison prior to my next purchase.

 

[Beauford t]

So today we had a brand new 165 Matryx Slash Pro NA in the group. I take back what I said about a little lag. The turbo has a huge amount of lag. I have 8 hours on my sled now and the NA was on its first ride. I also might agree with what was said above about the 22 having the snap of a 900. The NA flies out of the snow. I might be trying to find someone to trade this turbo for a 2nd NA. It rips going up hills but it sucks in the trees and it really does take twice the effort to ride. So far nobody who has ridden my turbo likes it better than their NA sled haha

I ended up buying a N/A 165 (for the wife) as the boost isn't here and my axys blew up.
I put 250 miles on it and the response and fun factor has me concerned about the boost.. Thinking what you just said
Found a set of take off Khaos shocks for it hope it'll help a little. Aggressive clutching to follow... can... hood...

 

[JeffBrines]

So even though chadly is an expert rider you don't think he is being aggressive enough?

I'll answer this for fun...

Chadly can be an expert level rider (whatever that means) and still not be so fond of the turbo setup. I agree that any turbo I've owned required more aggressive riding, and it also required more fitness. You will be muscling the sled more throughout the day. How much that bothers you has a lot to do with technique and ability, but also a lot to do with your overall willingness to "keep muscling the sled". You can't get the sled to do as much off bottom, which means more weight on skis, more steering input, less track spin off idle etc.

If you want something easy, something that doesn't require as much attention or muscle, you likely will be happier with the NA stuff. (this is comparing NA to aftermarket turbos).

I only have one day on the factory Doo turbo, but it does not require as much attention as the Polaris, Cat or aftermarket Ski-Doo turbo setups I've owned (but also did not have the same output).

Ultimately, I am hoping the Patriot Boost is akin to the Doo, but with a chassis I actually enjoy riding. In do time maybe I'll get to see...lol

 

[turboless terry]

Wasn't wanting an answer. Just having fun stirring the pot

 

[RBalazs]

Of course you were[emoji13]. I ride with Chad and Chad needs all the crap one can send. He dishes, so he gets[emoji23][emoji23][emoji23]


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[DUDEE]

Ok Im somewhat convinced Boost owners will want a clutch kit or gear down..So I hope TRS can shed some light on this Boost problem soon so I can spend some more $ on this money pit..

 

[turboless terry]

Of course you were[emoji13]. I ride with Chad and Chad needs all the crap one can send. He dishes, so he gets[emoji23][emoji23][emoji23]


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Exactly

 

[jvb]

Well if any sled takes some muscling around it wont be the sled for chadly! He has had so many bad turbo experiences that he is biased no matter how it runs. Years of trying to get pos turbo doos to run all he did was pull on skis so if he has to pull on anything he starts freaking out.