HP to weight ratio

thor9

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Jan 12, 2005
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sacandaga lake area N.Y.
:yam: In a Yamaha advertisment it states "unbeatable horsepower to weight ratio" For the people that rode the 2006/ test ride, what do you think? Do the Appex's really have a lot of pull compared to say a two stroke of equel HP ?
 

i rode an '05 rx1 for quite a while on the trails this winter and that thing was fast, even though they are kind of heavy, all that torque in the bottom and mid, along with the never ending top h.p., they definately do have some balls.
 
hey blue, I agree, I think that one has been tossed around for about 4 years now... Smart move to lay off of it... lol..... Well now at least with the fusion there can be comparisions to 4 stroke to 4 stroke. Considering poo's add takes a real good jab at yammi...
 
runwatyabrung said:
hey blue, I agree, I think that one has been tossed around for about 4 years now... Smart move to lay off of it... lol..... Well now at least with the fusion there can be comparisions to 4 stroke to 4 stroke. Considering poo's add takes a real good jab at yammi...

link to this add?
 
http://snowmobiles.polarisindustries.com/snowmobiles/snowtech.aspx

Go to real world power/4-stroke. I can't cut and paste what is brought up when you put the cursor on the turbo. But is says" this is the type of four stroke performance customers have been longing four" Hmm considering yammi is the only one to make a perfomance sled (4-stroke)who else can they say it towards?? Pretty much the yammi's lag without the turbo.... Sorry it's not a mag ad, just their site info. hey it's their first try here, let's see how it does. I think I feel the same about Poo as I did yammi a few years ago. Where are they going? The transition game continues....
 
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power as in tq it has far more than others at the same rpm levels. I always thought it just meant more low end tq to weight. I dunno, feels a lot faster than they look on paper lol. and feels a lot lighter, just like my viper feels lighter on the trail than it is.
 
Its been said that the RX-1 had the top-end power of an 800 but on the bottom had the torque of something much bigger.
I personally felt that the '05 RX-1 and '05 RS Vector that I rode felt faster than the '05 Fusion 900 that I rode (I rode all 3 sleds on the same day). You could really feel the torque and "pickup" of the 4-strokes but not so much on the Fusion. The Fusion certainly wasnt slow (no 900 is) but it just didnt have the torque of the 4-strokes.
As far as Polaris taking a "jab" at Yamaha, I dont see it that way. All the OEMs talk a lot of smack about how their's is the best and how everything else is junk, thats nothing new. Every year the OEMs try to convince us that we NEED the new sleds because they are so completely superior to what was made the previous year. Sometimes its true, most of the time it isnt but its up to us to weed through the BS and decide for ourselves what we want out of a sled. Its glad to see Yamaha giving anyone the chance to try out the 4-strokes. Its a great idea. They let you ride a brand-new sled with no pressure to buy.
Hebi
 
yea i think their demo ride program is a great idea. It gives people that are skeptical about yamaha a chance to ride them without people giving them a bunch of crap about riding a yamaha. The best way to convert people is to let them try it first hand to see how much they love it.
 
when people talk hp to weight ratio they fail to count the heaviest part of the sled. the person driving it

example a 100 hp sled weighs 500 lbs, a 600 lbs sled would need 120 hp for the same ratio.
through on a 200 lbs of rider and gear, and 100 lbs of fluids (easy to do)
the 600 lb sled only needs to make 112.5 hp to have the same power to weight ratio.

for a real fatass like me, the only time the weight of the sled matters at all is when it gets stuck


another point

what really matters is how much power gets to the ground thoughout a pass, not just what the hp peak on the dyno says, and the broader powerband of the 4 strokes whittles away the difference even more.

kind of like comparing a 300 hp deisel to a 300 hp gas engine. the deisel will leave the gasser eathing soot filled smoke
 
HP sells sleds , torque wins races !

Torque is where its at ! HP is a function of RPMs and load. Torque is the resistance to slowing down . 2 stroke sleds engage higher cause the make no power down low , 4 strokes have more torque down low where it matters .The RPM wasted by engaging high means the engine has to spin up faster to reach say 100MPH the gearing in a 4 stroke sled can be much taller and start engagement much lower . Most fast sleds are made to crap out from the factory at about 110MPH give or take ,the torque with a 4 stroke comes into play while you are getting there . Everyone has noticed how much harder you have to push a gas pedal down in a car to take off from a stop and how little it takes to maintain speed .if you have a 2 stroke sled with the same HP as a 4 stroke sled. and the 4 stroke has 25% more torque at midrange RPM,and top RPM , the 4 stroke will win everytime in a less than absolute top speed run . thats why drag race cars run big V8s and are completely out of RPMs going thru the traps . They run gears that let them get to top speed in a given amount of length . Who cares if a 2 stroke can beat a 4 stroke in a 3 mile race ?I would rather get to 1-2000' first by 20 lengths!
 
exactly! my dads vector outruns my viper by so much so quick, that it will take me the whole lake to catch and pass him. and both are BONE stock
 


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