Warning, -16 late build Viper turbo breakdowns, bad rods.

[staggs65]

Mpi says in the sales annonce that it is possible with 270hp, but in the text above its not recomended with more than 240hp ???View attachment 112842

I'm pretty sure that has always been MPI stance regardless of the year. They have to draw the line somewhere. You can't expect a 135 hp engine to be capable of infinite hp without some upgrades

 

[apexgturbo]

Makes sense to me, you can achieve 270hp with the add ons but you need to use stronger internal engine parts if you go over 240hp.

Why do we need to add stronger internals now with the viper engine to go pass 240hp.The old nytro engine was fine at 270hp on 91 octane with stock internals.what I am saying is the people that bought these new vipers to install a turbo setup to go to 270hp will now have to spend the extra $ to install rods which was not a issue before with the old nytro motor.

 

[phazerelit]

I agree that stingray has a bias but his point is valid. One turbo vendor is saying there are problems while the other isn't having any. Not sure which company is right, but the differing opinions are something to note!

It has been stated before, Hurricane has also canncelled/delayed all delivery of turbos for the 2016-motor until the rod-issue has been sorted out. Who is right and who is wrong, not so easy to say, cause there has been motors blowing up, thats for sure. What we do not know is if for example MPI has blown any rods/motors but found a solution to it, just that they are keeping their mouth shut about it.
I do not give a damn about who is right or wrong, I just wan't a engine that i can boost as done before.

 

[Srxspec]

MPI & Ulmer Racing will have aftermarket rods available shortly for those looking to turn up the boost. It is Ulmer Racing's opinion that the Yamaha/MPI kit available through dealers will function just fine.

 

[staggs65]

Why do we need to add stronger internals now with the viper engine to go pass 240hp.The old nytro engine was fine at 270hp on 91 octane with stock internals.what I am saying is the people that bought these new vipers to install a turbo setup to go to 270hp will now have to spend the extra $ to install rods which was not a issue before with the old nytro motor.

It is MPI'S disclaimer. Again, they had to draw the line somewhere. Does it mean your engine will blow at 241hp....no. If you look at MPI'S old site they only went to 220hp on the nytro with stock internals and recommended race fuel for that so they've actually upped they're disclaimer number.

 

[ntm_08]

MPI & Ulmer Racing will have aftermarket rods available shortly for those looking to turn up the boost. It is Ulmer Racing's opinion that the Yamaha/MPI kit available through dealers will function just fine.

So the 190 and 235kit from MPI will work with the stock 2016 rod??

 

[Srxspec]

I have run several 190 MPI kits on the 2016 rods. In my opinion I would not run the 240 kit on stock 2016 rods.

 

[ntm_08]

I have run several 190 MPI kits on the 2016 rods. In my opinion I would not run the 240 kit on stock 2016 rods.

So in your oppinion the 190 kit is proven in dyno to be reliable.
How many long/runs etc?

To say the 240kit would not hold the -16 rod. Where is the limit? 191hp?

 

[tator]

remember the yamaha warranted mpi kit is NOT 190 hp. it is 4.5 lbs boost not 6. so your looking at roughly 175hp on the mpi kit. mcx and hurricane are 6 lbs and are a 190 hp kit and both seem to be leery on the late 16s. also hurricane stands behind his kit AND motor for a year. haven't herd any complaints on here about troubles, service, or warranty, with the hurricane kits. but with that said if i had a mpi kit i WOULD take ulmer's word for gold. from what i have read on here, he is the clutching/engine man to go to. especially for mpi kits.

 

[HURRICANE]

I think that the rods become an issue in the short term at a certain level of hp. What is the short term level of hp? Well, it appears to be over the 190hp somewhere. Saying that, how do we test those limits? Also, what are the long term problems of the soft rods both boosted and stock? These questions are why we at hurricane performance have suspended turbo sales on these engines till we can find some concrete answers.
Guys will need to be careful in the future with there mpi upgrades on these engines. According to our dyno, the mpi trail turbo makes 141hp @4.5lbs boost. We turned it up to 158hp@6lbs boost. I can understand why the rods will take longer to break in the engines with mpi trail turbo kits compared to the hurricane 193hp@6lbs and the mcx 184@6lbs.these hp numbers are based on the engine making 130.2hp stock.
Also, we warrantied the engine for one year with the purchase of the hurricane 190hp turbo kits to address the thought of yamaha warranty with mpi turbo kits. This year however we have not extended warranty to the engines due to the success of several hundred hurricane 190 kits over the last couple of years. Also we are aware that the yamaha warranty states that the engine is NOT covered under warranty with the mpi trail turbo installed if engine damage occured due to boost.
I have to think that yamaha will quickly address the rod issue in future engines in 2017. I hope that yamaha will help the 2016 customers as the rods break over time in the near future. In the mean time, we at hurricane performance are working on aftermarket rods as well as a short term solution to the rods.
Dave marshall

 

[phazerelit]

I think that the rods become an issue in the short term at a certain level of hp. What is the short term level of hp? Well, it appears to be over the 190hp somewhere. Saying that, how do we test those limits? Also, what are the long term problems of the soft rods both boosted and stock? These questions are why we at hurricane performance have suspended turbo sales on these engines till we can find some concrete answers.
Guys will need to be careful in the future with there mpi upgrades on these engines. According to our dyno, the mpi trail turbo makes 141hp @4.5lbs boost. We turned it up to 158hp@6lbs boost. I can understand why the rods will take longer to break in the engines with mpi trail turbo kits compared to the hurricane 193hp@6lbs and the mcx 184@6lbs.these hp numbers are based on the engine making 130.2hp stock.
Also, we warrantied the engine for one year with the purchase of the hurricane 190hp turbo kits to address the thought of yamaha warranty with mpi turbo kits. This year however we have not extended warranty to the engines due to the success of several hundred hurricane 190 kits over the last couple of years. Also we are aware that the yamaha warranty states that the engine is NOT covered under warranty with the mpi trail turbo installed if engine damage occured due to boost.
I have to think that yamaha will quickly address the rod issue in future engines in 2017. I hope that yamaha will help the 2016 customers as the rods break over time in the near future. In the mean time, we at hurricane performance are working on aftermarket rods as well as a short term solution to the rods.
Dave marshall

Thanks, that was a very informative and honest text on this matter, from my point of view.

 

[apexgturbo]

I was at my dealer a couple weeks ago and in the shop was a 2015 viper with a mpi 190 kit install that had blown a rod through the block.the mechanic told me that mpi now recommended to use a 50/50 mix a race fuel at sea level.

 

[ViperNorway]

I think that the rods become an issue in the short term at a certain level of hp. What is the short term level of hp? Well, it appears to be over the 190hp somewhere. Saying that, how do we test those limits? Also, what are the long term problems of the soft rods both boosted and stock? These questions are why we at hurricane performance have suspended turbo sales on these engines till we can find some concrete answers.
Guys will need to be careful in the future with there mpi upgrades on these engines. According to our dyno, the mpi trail turbo makes 141hp @4.5lbs boost. We turned it up to 158hp@6lbs boost. I can understand why the rods will take longer to break in the engines with mpi trail turbo kits compared to the hurricane 193hp@6lbs and the mcx 184@6lbs.these hp numbers are based on the engine making 130.2hp stock.
Also, we warrantied the engine for one year with the purchase of the hurricane 190hp turbo kits to address the thought of yamaha warranty with mpi turbo kits. This year however we have not extended warranty to the engines due to the success of several hundred hurricane 190 kits over the last couple of years. Also we are aware that the yamaha warranty states that the engine is NOT covered under warranty with the mpi trail turbo installed if engine damage occured due to boost.
I have to think that yamaha will quickly address the rod issue in future engines in 2017. I hope that yamaha will help the 2016 customers as the rods break over time in the near future. In the mean time, we at hurricane performance are working on aftermarket rods as well as a short term solution to the rods.
Dave marshall

Very well said. It is nice that a supplier enters the forum and helps the snowmobile community.
I am sure Mcxpress is hard at work on the matter, but still. Answered most of my questions.

Over to something else, when I am engine swapping my 16 engine to a 15' engine, do I also need to change ECU?
And is the igniton any different?

 

[shagman]

I was at my dealer a couple weeks ago and in the shop was a 2015 viper with a mpi 190 kit install that had blown a rod through the block.the mechanic told me that mpi now recommended to use a 50/50 mix a race fuel at sea level.

How many miles? We're there gauges on that sled?


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[apexgturbo]

How many miles? We're there gauges on that sled?


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How many miles? We're there gauges on that sled?


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guages were installed but not sure on the miles.