Catalyst Cat Chassis

Radar78

Active VIP Member
Joined
Apr 14, 2013
Messages
499
Reaction score
1,061
Location
Dundurn, Sask. Canada
Holy balls. This thing might actually be awesome! But let me get this straight…..I can’t get one with at least an 800cc engine until 2025? Wtf?


Sent from my iPhone using Tapatalk
 

Kind

Active VIP Member
Joined
Apr 1, 2011
Messages
1,250
Reaction score
5,117
Location
Bonnyville
Do people even buy much for 600cc mountain sleds?

Cat better have monster of a motor/motors in the works. Bring back the 700 and 900’s. Give the 700 a long stroke and beefy crank so it makes decent torque then make bigger jugs to up it to a 900 and square off the stroke to piston diameter ratio to make the 900 happier up top. But what the fuk do I know besides I’m tired of seeing Cat take a back seat to the other two brands.
 

Modman

Active VIP Member
Joined
Mar 13, 2008
Messages
6,009
Reaction score
8,340
Location
Castlegar
Do people even buy much for 600cc mountain sleds?

Cat better have monster of a motor/motors in the works. Bring back the 700 and 900’s. Give the 700 a long stroke and beefy crank so it makes decent torque then make bigger jugs to up it to a 900 and square off the stroke to piston diameter ratio to make the 900 happier up top. But what the fuk do I know besides I’m tired of seeing Cat take a back seat to the other two brands.
Motor specs will come into play, cuz the new injectors shoot through the pistons. Longer stroke is more piston speed and harder on parts. 82 mm X 80 mm bore and stroke is basically the ski doo 850. 84 X 81 mm by the numbers is 897cc. You could lower it but too square and it'll have issues. You have rod ratios, angles etc etc to worry about. The M1000 was 90.3 x 78.7mm bore to stroke, so 1.15 ratio (bore over stroke). New Ski Doo 850 is 1.04 and the Polaris is 1.18. In order to keep the engine height down, they might have to keep the stroke similar to now, not sure how it fits in the new chassis but that's a big consideration. Rod ratio will play a big factor in the piston wear with windowed pistons as side pressure increases, less surface area to support spiton skirts. Also, crank deflection........
 

sirkdev

Active VIP Member
Joined
Nov 2, 2008
Messages
3,127
Reaction score
4,970
Location
Stony Plain
Motor specs will come into play, cuz the new injectors shoot through the pistons. Longer stroke is more piston speed and harder on parts. 82 mm X 80 mm bore and stroke is basically the ski doo 850. 84 X 81 mm by the numbers is 897cc. You could lower it but too square and it'll have issues. You have rod ratios, angles etc etc to worry about. The M1000 was 90.3 x 78.7mm bore to stroke, so 1.15 ratio (bore over stroke). New Ski Doo 850 is 1.04 and the Polaris is 1.18. In order to keep the engine height down, they might have to keep the stroke similar to now, not sure how it fits in the new chassis but that's a big consideration. Rod ratio will play a big factor in the piston wear with windowed pistons as side pressure increases, less surface area to support spiton skirts. Also, crank deflection........
Do these things keep you up at night.. all valid points!
 

mountianguy

Active VIP Member
Joined
Apr 26, 2009
Messages
557
Reaction score
653
Location
stony plain
Arctic Cat hasn't used slotted pistons in the 800 since 2019 on North American models. Some European used the slotted piston not sure if they still do or not.
 

snopro

Active VIP Member
Joined
Mar 3, 2009
Messages
102,000
Reaction score
90,946
Location
Milo,Alberta
😬
 

Attachments

  • 8FBE7D2B-7B92-4A8D-B599-AA179ED152C3.jpeg
    8FBE7D2B-7B92-4A8D-B599-AA179ED152C3.jpeg
    299.6 KB · Views: 318

tmo1620

Active VIP Member
Joined
Feb 28, 2008
Messages
3,810
Reaction score
7,182
Location
Whitecourt
Some riding footage. There’s more on his IG page.



With a real motor it could be a winner, by the time that happens though I’ll either be on a different brand or quit sledding all together so kind of too late for this long time cat rider me thinks.


Sent from my iPhone using Tapatalk
 

Couch

Active VIP Member
Joined
Apr 14, 2013
Messages
674
Reaction score
1,191
Location
Nl
Looks like it's able to lift even with the 600 ...more video would be nice especially without bullet time / slow mo edits

Sent from my motorola edge plus using Tapatalk
 

tmo1620

Active VIP Member
Joined
Feb 28, 2008
Messages
3,810
Reaction score
7,182
Location
Whitecourt
Looks like it's able to lift even with the 600 ...more video would be nice especially without bullet time / slow mo edits

Sent from my motorola edge plus using Tapatalk

But that’s how you creatively make the sled look better than it is


Sent from my iPhone using Tapatalk
 
Top Bottom