Power to Weight Ratio: Four Stoke vs. Two Stroke

[Matt@MPI]

I have asked MPI for some of their Dyno results from all the testing they did this year. Hopefully they can share some of their testing results for Aspirated and Boosted sleds.

I'm trying to find the graph but I can tell you that @6psi it holds 100 ft/lbs of torque from 5000-8800 RPM. The stock sled made about 72-73ish it too was a flat line.

 

[cacsrx1]

Speaking with NO real firsthand knowlege here.

Are there any legitimate mass produced 2S Turbo kits for $2,500 on the market??

The MPI Turbo option on Snowchecked Vipers is an absolute STEAL in the industry.

They HAVE TO make these kits available dirt cheap.........other wise nobody in their right mind would buy an MTX.

 

[christopher]

They HAVE TO make these kits available dirt cheap.........other wise nobody in their right mind would buy an MTX.

 

[BigFish BC]

They HAVE TO make these kits available dirt cheap.........other wise nobody in their right mind would buy an MTX.

says the guy riding the heaviest 2s out there

 

[BigFish BC]

So explain to me why you allow for a turbo to be added to one sled and not the other? You can turbo up a Pro just as easily as you can turbo up a Viper. Comparing a turbo sled to a non turbo sled and claiming apples to apples is disengenuous at best...

I think what needs to be done, if this comparison is to be at all valid, is to use a turbo 2s when comparing to a turbo 4s. Of course that would ruin your power to wieght argument wouldn't it?

because you will never see a 2s turbo from factory & there is already a couple 4s turbo from factory.

 

[cacsrx1]

says the guy riding the heaviest 2s out there

Says the guys riding the Nytro ......aka the worst mountain sled ever produced.

 

[BigFish BC]

Says the guys riding the Nytro ......aka the worst mountain sled ever produced.

funny i can ride it just fine
glad you are happy with a 470lb dry 2s
we can do this all day if it makes yah feel any better

 

[christopher]

Says the guys riding the Nytro ......aka the worst mountain sled ever produced.

Oh here we go...

 

[rmscustom]

Power to Weight Ratio only matters when your full on the flipper... How should we measure the other 90% of the ride???

 

[cacsrx1]

You can spin the power to weight argument any way you want it.......1000Lbs sled with 350hp has a good power to weight ratio........Im sure it would be a great seller.

 

[cacsrx1]

Yep here we go Christopher, have you sold your Nytro yet?

 

[10003514]

Where is the 610 weight coming from? I thought Yamaha and snowest weighed a 153 Viper MPI turbo this spring at it was 641 lbs ?

 

[cacsrx1]

funny i can ride it just fine
glad you are happy with a 470lb dry 2s
we can do this all day if it makes yah feel any better

Looks like the 174's are comming in at 545 RTR.

 

[Jager Bomb 243]

Go to 1:40 and watch till about 3:30

https://www.youtube.com/watch?v=LtjsylwWboc

Polaris 543

Ski Doo 576

Yamaha 641 (with MPI turbo installed)

<iframe width="853" height="480" src="//www.youtube.com/embed/LtjsylwWboc" frameborder="0" allowfullscreen></iframe>

 

[treemagnet03]

What's also missing here is a graph with detailed analysis of how much energy is required to ride a sled. And that, right there, has been the difference for most riders to this point. No one wants to be stuck with the fat girl at the dance. Even if her output is higher...

 

[mr.deeds]

This might have already been said (I didn't read the whole thread).. but when I figure power to weight I add my weight and gear into the mix. Adding another 200 pounds makes a lot more difference to a 120hp sled than it does to a 200hp sled.
Even with that I prefer a 2-stroke in sleds... and a 4-stroke in dirt bikes.

 

[yamahajohnson220]

Says the guys riding the Nytro ......aka the worst mountain sled ever produced.

Yep here we go Christopher, have you sold your Nytro yet?

About time to go pick fights with your younger sister? Take your crap somewhere else.

 

[BigFish BC]

Looks like the 174's are comming in at 545 RTR.

show me the money
didnt feel that light when i tried to move one

 

[10003514]

show me the money
didnt feel that light when i tried to move one

Snowandmud.com has a couple weighed, 539 T3163, 545.6lbs for T3174.

 

[cacsrx1]

Snowandmud.com has a couple weighed, 539 T3163, 545.6lbs for T3174.

I take all of these # with a grain of salt....they could be total bs, just like the 641-turbo vs 601lbs.