12 w/chain vs 13 w/belt

[steepndeep800]

Has anyone run real world no speculations a stock pro sled with a chain vs stock pro with a belt drive?
I have seen a big difference on the throttle response and power getting put to track in a race in 2 ft of fresh snow.

CMX is claiming 20% gain in power to track from his belt drive
C3 is claiming 10-15%

150 hp + 10% = sled with chain case needs 165hp motor to get same power to track?

Would like to hear from people with comparisons and info

 

[turboless terry]

All I know is that my 12, with a tied clutch, beat the 13 demo in a drag race uphill, last spring. Close out of the hole and 2 lengths at the top of the hill. So if the belt drive gains you 20% then the tied clutch must gain you 30%. I still have the 12with tied clutch and a 13 with tied clutch. I can't compare because I have a 3 inch track on the 13. I call bs on the 20%.

 

[Dootimes2]

No way will you gain that much with a belt drive. If it were the case it would be the number 1 mod people would do and it is not.

 

[Gvrunyn]

I will tell you this I have riden with two seperate 12 pros against my 13 and didn't notice a whole lot of difference in drag racing and powder climbing. I will tell you the 13 revs quicker but as far as any real advantage I didn't see much.

X2 on the tied team. They seem to work well and backshift is better!

The sleds We ran were all 163's

 

[die hard poo]

I will say this, my 13 pro will pull more rpm than my 11 did stock with the same clutching pulled from the 11 and the throttle response on a 13 is far superior to the 11. All in all, if polaris can make the belt drive reliable, it is so worth it! I think it there is a noticeable difference for sure. I am running mtx 68g weights fully loaded with 6g of weight, stock 140/330 sping, and a steeper helix 60/42/.36 and having to run the ethanol fuel mode so it won't over rev on my wife! The 11 ran 2 gram less, and non ethanol mode and didn't over rev at all on her. That is proof enough for me there is a difference between an 11 to a 13.

 

[mrquick68]

in repeated trail drag racing my 2013 continually out pulled a number of 2012s. It also uses less fuel and is definitely more snappy. In a straightup climb, the 2013 might be a little better, but not a ton. Drivability and accerlation though are significantly improved. Love how snappy this motor is.

 

[2XM3]

theres NFW that the belt will gain that much over a chaincase.....pretty much a dead even toss up, well until the belt tears its lugs off...lol I will say however that I believe the 2013 sled does in fact make a tad more power than the 2012, and the fueling is better as well....

 

[allblowdup]

I have done the test on a real dyno. It IS 3% increase at the drive shaft.

 

[mountainhorse]

I'm interested to see how the Std.13 RMK feels compared the 12 and the 13 PRO's.

Engine alone Vs. Engine and better drive-train efficiency.

The 2013 800 DC-CFI-2 definitely has benefited from Evolution IMO.





.

 

[pura vida]

I will say this, my 13 pro will pull more rpm than my 11 did stock with the same clutching pulled from the 11 and the throttle response on a 13 is far superior to the 11. All in all, if polaris can make the belt drive reliable, it is so worth it! I think it there is a noticeable difference for sure. I am running mtx 68g weights fully loaded with 6g of weight, stock 140/330 sping, and a steeper helix 60/42/.36 and having to run the ethanol fuel mode so it won't over rev on my wife! The 11 ran 2 gram less, and non ethanol mode and didn't over rev at all on her. That is proof enough for me there is a difference between an 11 to a 13.

i think it is a mistake to assume all of the difference you are seeing is from the belt drive. the 12s would pull more clutching than the 11 also. my 13 is pulling pretty much the same clutching as other people's 12s. my 13 is pulling pretty much the same clutching as my 11 with a pipe and a head. no way that is all from the QD. as MH said, you/we really need to compare the 13 rmk to the 13 pro to see if there is any really world, on the hill difference between the two. i do believe, there is no way there is a 20% or even 10% difference. as someone else said, if that was the case then every sled would be running a belt drive. for that kind of improvement it would decidedly be worth dealing with stripped belts. keep in mind, chains are exactly considered inefficient. i have stripped one belt so far and if i strip the others i have or it is shown that the QD system is unreliable, then i will have no problem replacing it with a chaincase and weight gain won't concern me.

pv

 

[xTonyCRx]

CMX is claiming 20% gain in power to track from his belt drive
C3 is claiming 10-15%

150 hp + 10% = sled with chain case needs 165hp motor to get same power to track?

Would like to hear from people with comparisons and info

I would imagine the numbers you are quoting are the percentage decrease in the power lost. That is to say if a chain robs say 5hp the belt losses would be reduced buy 15-20%. Defiantly not 20% gain in overall power to the track.

 

[hiwayman]

011 assault and 013 pro RMK both 155's, both with series 5.1 tracks. My 011 has the F-bomb track mod and a team tied. Pro is bone stock. Both drive clutch's have same weights and spring. stock poo spring and 62 gr. weights. Who ever gets the jump at the line wins. Pretty much a 50/50 deal. always within 1/2 a ski length. No way is there 20% difference.

 

[Dootimes2]

I would imagine the numbers you are quoting are the percentage decrease in the power lost. That is to say if a chain robs say 5hp the belt losses would be reduced buy 15-20%. Defiantly not 20% gain in overall power to the track.

Ding, Ding, Ding, I think we have a winner!

 

[whoisthatguy]

I would imagine the numbers you are quoting are the percentage decrease in the power lost. That is to say if a chain robs say 5hp the belt losses would be reduced buy 15-20%. Defiantly not 20% gain in overall power to the track.

If I am reading this right then the Polaris saleman's sales pitch that the belt drives are really getting the power to the track, means:

1 HORSEPOWER MORE !

 

[blackie205]

I will say this, my 13 pro will pull more rpm than my 11 did stock with the same clutching pulled from the 11 and the throttle response on a 13 is far superior to the 11. All in all, if polaris can make the belt drive reliable, it is so worth it! I think it there is a noticeable difference for sure. I am running mtx 68g weights fully loaded with 6g of weight, stock 140/330 sping, and a steeper helix 60/42/.36 and having to run the ethanol fuel mode so it won't over rev on my wife! The 11 ran 2 gram less, and non ethanol mode and didn't over rev at all on her. That is proof enough for me there is a difference between an 11 to a 13.

i got the same thing running mds weights from my 11 it ran 8000-8050 the 13 running 8350-8400 so i have now added 3 grams and switching to a lighter primary spring as well

 

[steepndeep800]

From what I noticed the 13 revved up quicker than a
12. I've been told it could be the new electronics that were put on the 13 and are supposed tobe far superior. Anyone else?

 

[mickyd32]

I am in Idaho today. We have two rented standard RMK 800 x 155

I will compare to my 13 and see what I think

 

[mrquick68]

here's my theory:

1. There is probably a 1 to 2 HP increase in power to the track because of the belt drive.
2. The lightweight benefits are really in accerlation (ie: snappiness) and some pull off the line.
3. There is likely a bit more power being pulled from the 13 due to a cleanup in fueling and perhaps ignition timing. Let's guess 3-4 hp?

Therefore you, could get a sled that's gets up to speed a bit quicker, and has a little more power (5?), and that weighs about 17lbs less than before. That all equates to a sled that is noticably quicker, is a little easier to ride/manuver, but not all that much faster in a climb or rung out on the trail. All in all, good evolutional changes that aren't major but added together make a noticable improvement over last years model.

 

[The Fourth Wolf]

I have a '12 163 and have not thrown a leg over a '13 yet.

IIRC the 20% number being thrown around was that the QD offered a 20% reduction in rotating mass over the chain case.

Less rotating mass has two primary effects:
1) Less gyroscopic effect means less rider input needed during aggressive turns (yep, more flickable)

2) Less parasitic drag so a greater proportion of the HP generated is transferred to the track

I cannot recall reading anything that said the QD resulted in a 20% increase in power to the track.

 

[Hairy Mark]

BUT THE 13 IS MORE FLICKABLE DAMMIT. ALL THE PEOPLE WHO RODE THEM THIS SPRING COULDN'T BE WRONG.