<div class="FTQUOTE"><begin quote>Originally posted by: stendori

i was told a long time ago they were around 56 hp. unknown if its true or not but seems strange they list 2 differnt hp rating for the reg. 800 and no mention of the 800 HO.</end quote></div>

Yep, I've also read that the newer 800's (HO's) were around 55 HP. For me, that would be around the ideal amount of power. Now if Polaris will make an XP with 55 - 60 HP... I'm in! LOL

 

As far as I could tell the advertised claim is the HO has 9% more power/12% more TQ...due to the exhaust,although it appears the cam at least is different also but there is apparently no CARB rating that supports that...maybe Polaris pulled a fast one on the CARB. LOL
BTW on the carb readings..in 2007 and previous years they were rated by HP and the 800 was rated at 50,in 08 they went to Kw and doing the conversion that dropped the 800 to ~48.3.. while the Can-Am ratings stayed cosistent at 61.7...makes you wonder who does the testing..is it provided my the manufacturere on the honor system? lol


BTW-Wolf asked about dyno numbers,chassis dyno numbers are going to be alot lower due to driveline losses,the CARB numbers are at the crank...

I talked to the tech guys at HMF yesterday,the dyno guy was gone already but they said they would have some info for me on Monday. I was curious if they had done testing with air filters ect in addition to the exhaust,as they do alot of times to compliment their exhaust..hoping to get some info on Optimizers settings,and interested in what they found as far as power increases..
Also in the video comparison they said the swamp series exhaust made 4 more hp and the XL made 5 more..but the guy I talked to said the swamp made 5 or 6 and the XL 1 or 2 more...I'll get it from the horses mouth on Monday and try to get him to put up the graphs on their forums..I'm more interested in the graph than peak numbers..

 

None of the ATV manufacturer's are in a HP race with there ATV like with there Snowmobiles. Polaris would of put there 140 HP 4 stroke 750 twin from there "Switchback" sled if that was the case.

Yamaha makes a 80HP 500cc 4stroke twin for there "Venture lite".

A Arctic Cat Jaguar Z1 with a 1000 4 stroke twin Link that makes 125hp, yet there 1000 ATV only makes 66HP!

All there ATV makers are just holding back , if they began a HP war with ATVs the government would band them like they did 3 wheelers back in the 1980,s.

 

Not to forget that there would be more weight added for increased driveline strength. Everyone whines about the weight of Polaris already. The carb numbers are always spot on, of course, but a dyno would be nice. CC1999 will probably have his on the dyno pretty soon.

 

Just remember on a CVT tranny there is about a 30% to 35% loss from crank to wheels. So if the 850 has 70 hp at the crank, it would have between 45-49hp at the wheels. Also tire selection can also effect dyno numbers.

 

Yep..about 30%-35% seems to be average for a CVT machine....for instance Can-AM..61.7 at the crank and 43.4 peak at the wheels...Brute 750 ~50 at the crank and 31 peak at the wheels.
I'm iterested to see the numbers for the XP and see if we can tell if claims of a more efficient driveline are true..anyone have any dyno numbers for a Polaris Sportsman as a base line for driveline losses?

 

Inerestingly the Rincon looks to have better than a 40% loss..rated at 38.5 and appaerently makes about 22 at the wheels...

 

<div class="FTQUOTE"><begin quote>Originally posted by: HIGHOCTANE

Inerestingly the Rincon looks to have better than a 40% loss..rated at 38.5 and appaerently makes about 22 at the wheels...</end quote></div>

Ouch... my John Deere garden tractor has more HP than that... and it's not a belt drive! LOL

 

nice post tlc....interesting.. suprised to see the artic cat 1000 at only 65hp? anyway thx for sharing...

 

<div class="FTQUOTE"><begin quote>Originally posted by: GE4x4

Just remember on a CVT tranny there is about a 30% to 35% loss from crank to wheels. So if the 850 has 70 hp at the crank, it would have between 45-49hp at the wheels. Also tire selection can also effect dyno numbers.</end quote></div>

They all lose HP at the wheels CVT or Manual. A 32hp 500 Suzuki Vinson 5 speed manual can not beat a 35hp 500 Sportsman CVT or 500 Outlander in a drag race.

The 500 Foreman and AC 500 Manuals can just Hang with a 450 Grizzly cvt.

<div class="FTQUOTE"><begin quote>Not to forget that there would be more weight added for increased driveline strength</end quote></div>
The secondary and primary drives and belts of a ATV are made to the same strength as there sled counterparts.

There is a guy on You tube that put a 700 XC 120 hp Polaris sled motor in his Scrambler and he did nothing to the drive train without issues.
Scrambler with a 700cc 120hp sled motor video.