For support please email or pm Christopher christopher@snowestonline.com



Upgrade to Premium
Yamaha: Boosted Sleds (Turbo or Supercharged) Turbo discussion for Yamaha aftermarket Turbo or Super Charged sleds.
Reply
 
Share Thread Tools Display Modes
  #1  
Old 08-28-2010, 05:51 PM
mkhoskins mkhoskins is offline
Currently: looking for a new tnytro
Join Date: Sep 2009
Location: kaysville utah
Basic Member
Posts: 223
Thanks: 53
Thanked 19 Times in 16 Posts
Rep Power: 340210
mkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond repute
Default elevation and clutching?

I know this is a little elementary, but why do you set the clutch up according to elevation? What the difference if a clutch is set up for 5-7k feet or 8-10k feet, I dont understand....if someone could explain I would greatly appreciate it.
Reply With Quote


Rate this post: Yes | No
  #2  
Old 08-28-2010, 10:07 PM
philsummers21 philsummers21 is offline
Currently: Enjoying the new ProClimb
Join Date: Nov 2007
Location: Big Horns, Wyoming
Age: 37
Posts: 2,437
Thanks: 94
Thanked 311 Times in 222 Posts
Rep Power: 21474850
philsummers21 has a reputation beyond reputephilsummers21 has a reputation beyond reputephilsummers21 has a reputation beyond reputephilsummers21 has a reputation beyond reputephilsummers21 has a reputation beyond reputephilsummers21 has a reputation beyond reputephilsummers21 has a reputation beyond reputephilsummers21 has a reputation beyond reputephilsummers21 has a reputation beyond reputephilsummers21 has a reputation beyond reputephilsummers21 has a reputation beyond repute
Default

Higher altitude you lose hp.
Reply With Quote


Rate this post: Yes | No
  #3  
Old 08-29-2010, 10:25 AM
mkhoskins mkhoskins is offline
Currently: looking for a new tnytro
Join Date: Sep 2009
Location: kaysville utah
Basic Member
Posts: 223
Thanks: 53
Thanked 19 Times in 16 Posts
Rep Power: 340210
mkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond repute
Default

Quote:
Originally Posted by philsummers21 View Post
Higher altitude you lose hp.
On a boosted sled why would that matter if you can just turn your boost up when you lose power? I am just wondering because so many guys are saying that there clutching is set up perfect for 7k-9k feet and I wonder if that means it will run like **** when you are not at that altitude?
Reply With Quote


Rate this post: Yes | No
  #4  
Old 08-29-2010, 11:58 AM
MTN_VIPER's Avatar
MTN_VIPER MTN_VIPER is offline
Currently: Making roll-over valve kits since 2008
Join Date: Nov 2007
Location: NW WA St.
Age: 60
Posts: 872
Thanks: 150
Thanked 293 Times in 196 Posts
Rep Power: 14753562
MTN_VIPER has a reputation beyond reputeMTN_VIPER has a reputation beyond reputeMTN_VIPER has a reputation beyond reputeMTN_VIPER has a reputation beyond reputeMTN_VIPER has a reputation beyond reputeMTN_VIPER has a reputation beyond reputeMTN_VIPER has a reputation beyond reputeMTN_VIPER has a reputation beyond reputeMTN_VIPER has a reputation beyond reputeMTN_VIPER has a reputation beyond reputeMTN_VIPER has a reputation beyond repute
Default

mkhoskins

What that means is it would probably over-rev slightly at lower elevations and under-rev slightly above 7-9k feet.

I may run ok, however the shift rpms may not be in the ideal range at wide open throttle.

Boosted sleds will usually have a nice broad power peak curve. Possibly as wide as a thousand rpms! While a high strung small displacement 2 stroke can have a very narrow power peak band. Sometimes as narrow as a couple hunderd rpms.

Because of the adjustable boost levels and the broad power band, your boosted four stroke will be less sensitive to elevation changes. This is because it is much easier for the engine stay at it's peak power output. It may not care if it's turning 9200 or 8600! While a 600 rpm change is huge for a N/A two stroke.

I would set it up, so that the rpms are at they're peak power output for the most common areas that you ride. If you happen to go up or down a couple thousand feet in elevation, your still going to have plenty of power to bring a smile to your face!
__________________
Four Stroke Solutions LLC
Patented Roll-Over Valve Systems
ROV kits for M/XF7000/Viper, Sidewinder and King Cat with Quick-prime!
For Arctic Cat and Yamaha Sleds
Patents 8,225,766 8,528,516 9,303,537

http://fourstrokesolutionsllc.webs.com/
e-mail fourstrokesolutionsllc@hotmail.com
Reply With Quote


Rate this post: Yes | No
The Following 2 Users Say Thank You to MTN_VIPER For This Useful Post:
mkhoskins (08-29-2010), vmax6 (01-09-2015)
  #5  
Old 08-29-2010, 12:22 PM
Motleyone's Avatar
Motleyone Motleyone is offline
Currently: "When your going through hell, keep going" Winston Churchill
Join Date: Nov 2007
Location: Pullman,WA
Posts: 797
Thanks: 24
Thanked 114 Times in 74 Posts
Rep Power: 7744165
Motleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond repute
Default

Somebody correct me if this does not sound right. To answer your question about a turbo sled you would want to change clutching (especially primary) at a higher elevation at some point because you can only turn the boost up so high. In terms of a NA sled you lose hp as you go up in elevation. Because of this your sled does not have the abililty to throw the heavier weights around like it did at a lower elevation. Since your motor is robbed of power at higher elevation you need to make it easier for the clutch to close to reach your peak rpm. You do this by decreasing your primary clutch weights. Notice I said spring rate and not preload. This is why there is such a wide variety of spring preload/spring rate combinations out there. The preload determines at what rpm your belt will engaged and the sled starts to move. The spring rate determines how much the spring will compress under load, usually measured in kg/mm. If you leave the same spring in the primary and just decrease the weights there is less resistance for the motor to spin those weights out on the arms to compress the spring and fully close your primary clutch and reach peak rpms. At higher elevation you would want to reduce your preload on your primary spring if it is a deep powder day. This will allow for lower rpm engagement. This will stop you from banging into engagement which will cause you to trench.
__________________
This sh*ts chess, it ain't checker's!!!! DW

Lovin the big boost!!!
Reply With Quote


Rate this post: Yes | No
The Following 2 Users Say Thank You to Motleyone For This Useful Post:
dirk (10-23-2013), mkhoskins (08-29-2010)
  #6  
Old 08-29-2010, 12:34 PM
mkhoskins mkhoskins is offline
Currently: looking for a new tnytro
Join Date: Sep 2009
Location: kaysville utah
Basic Member
Posts: 223
Thanks: 53
Thanked 19 Times in 16 Posts
Rep Power: 340210
mkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond reputemkhoskins has a reputation beyond repute
Default

Quote:
Originally Posted by Motleyone View Post
Somebody correct me if this does not sound right. To answer your question about a turbo sled you would want to change clutching (especially primary) at a higher elevation at some point because you can only turn the boost up so high. In terms of a NA sled you lose hp as you go up in elevation. Because of this your sled does not have the abililty to throw the heavier weights around like it did at a lower elevation. Since your motor is robbed of power at higher elevation you need to make it easier for the clutch to close to reach your peak rpm. You do this by decreasing your primary clutch weights. Notice I said spring rate and not preload. This is why there is such a wide variety of spring preload/spring rate combinations out there. The preload determines at what rpm your belt will engaged and the sled starts to move. The spring rate determines how much the spring will compress under load, usually measured in kg/mm. If you leave the same spring in the primary and just decrease the weights there is less resistance for the motor to spin those weights out on the arms to compress the spring and fully close your primary clutch and reach peak rpms. At higher elevation you would want to reduce your preload on your primary spring if it is a deep powder day. This will allow for lower rpm engagement. This will stop you from banging into engagement which will cause you to trench.
always what I am looking for, motleyone, You're the best. That makes a lot more sense, I have my clutch setup for my sled perfectly right now(done by someone else) And just wanted to know what that truly means. Thank you guys for the post it has been helpful.
Reply With Quote


Rate this post: Yes | No
  #7  
Old 08-29-2010, 12:48 PM
Motleyone's Avatar
Motleyone Motleyone is offline
Currently: "When your going through hell, keep going" Winston Churchill
Join Date: Nov 2007
Location: Pullman,WA
Posts: 797
Thanks: 24
Thanked 114 Times in 74 Posts
Rep Power: 7744165
Motleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond reputeMotleyone has a reputation beyond repute
Default

No problemo, hope you get her dialed this winter.
__________________
This sh*ts chess, it ain't checker's!!!! DW

Lovin the big boost!!!
Reply With Quote


Rate this post: Yes | No
  #8  
Old 01-27-2014, 10:10 PM
Bigbragg Bigbragg is offline
Currently: Not set.
Join Date: Nov 2012
Location: North East Alberta
Basic Member
Posts: 13
Thanks: 8
Thanked 0 Times in 0 Posts
Rep Power: 0
Bigbragg is an unknown quantity at this point
Default

So what would be the ideal RPM for a 2013 nytro with the MCX 270 kit at 5000 - 7000 feet ?
Reply With Quote


Rate this post: Yes | No
  #9  
Old 01-28-2014, 12:46 PM
up-high's Avatar
up-high up-high is offline
Currently: New femur and a new knee and more metal in hip!!
Join Date: Nov 2007
Location: Alberta Canada
Age: 66
Posts: 1,526
Thanks: 50
Thanked 170 Times in 130 Posts
Rep Power: 18129570
up-high has a reputation beyond reputeup-high has a reputation beyond reputeup-high has a reputation beyond reputeup-high has a reputation beyond reputeup-high has a reputation beyond reputeup-high has a reputation beyond reputeup-high has a reputation beyond reputeup-high has a reputation beyond reputeup-high has a reputation beyond reputeup-high has a reputation beyond reputeup-high has a reputation beyond repute
Default

8600 whatever the altitude. That seems to be the rpm that motor likes. Unless you ride over 10,000 feet, I don't think clutching is an issue. The turbo just spins faster to maintain the set boost. Never changed the clutching on 2 Apexes and 2 Nytros. Course I rarely rode over 10,000 feet either.
__________________
65/121 It don't get any lighter!
BERRGG

It's Mountainhorse time now!!!
Reply With Quote


Rate this post: Yes | No
  #10  
Old 02-08-2014, 02:36 AM
Bigbragg Bigbragg is offline
Currently: Not set.
Join Date: Nov 2012
Location: North East Alberta
Basic Member
Posts: 13
Thanks: 8
Thanked 0 Times in 0 Posts
Rep Power: 0
Bigbragg is an unknown quantity at this point
  #11  
Old 02-08-2014, 09:47 AM
BCBOOST BCBOOST is offline
Currently: Heading to the Sand Land.
Join Date: Oct 2004
Location: Kelowna B.C.
Basic Member
Age: 46
Posts: 192
Thanks: 84
Thanked 44 Times in 24 Posts
Rep Power: 1933011
BCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond repute
Warning You Must be a registered member and logged in to view this response.

Click Here to Register

  #12  
Old 02-14-2014, 07:48 PM
Bigbragg Bigbragg is offline
Currently: Not set.
Join Date: Nov 2012
Location: North East Alberta
Basic Member
Posts: 13
Thanks: 8
Thanked 0 Times in 0 Posts
Rep Power: 0
Bigbragg is an unknown quantity at this point
Warning You Must be a registered member and logged in to view this response.

Click Here to Register

  #13  
Old 02-14-2014, 11:09 PM
BCBOOST BCBOOST is offline
Currently: Heading to the Sand Land.
Join Date: Oct 2004
Location: Kelowna B.C.
Basic Member
Age: 46
Posts: 192
Thanks: 84
Thanked 44 Times in 24 Posts
Rep Power: 1933011
BCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond reputeBCBOOST has a reputation beyond repute
Warning You Must be a registered member and logged in to view this response.

Click Here to Register

The Following User Says Thank You to BCBOOST For This Useful Post:
Bigbragg (02-15-2014)
  #14  
Old 03-14-2014, 08:03 AM
julio julio is offline
Currently: thinking fishing while waiting for snow
Join Date: Nov 2007
Basic Member
Posts: 445
Thanks: 2
Thanked 47 Times in 33 Posts
Rep Power: 3288063
julio has a reputation beyond reputejulio has a reputation beyond reputejulio has a reputation beyond reputejulio has a reputation beyond reputejulio has a reputation beyond reputejulio has a reputation beyond reputejulio has a reputation beyond reputejulio has a reputation beyond reputejulio has a reputation beyond reputejulio has a reputation beyond reputejulio has a reputation beyond repute
Warning You Must be a registered member and logged in to view this response.

Click Here to Register

Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Thread — 2010 M series low elevation clutching? Thread Starter — Destroyer Forum — Arctic Cat: M Series Replies — 6 Last Post — 10-24-2009 05:06 PM
Thread — Low Elevation (AK) M1000 Clutching Thread Starter — RMK SeVeN Forum — Arctic Cat: M Series Replies — 0 Last Post — 10-24-2009 01:37 PM
Thread — Clutching for lower elevation? Thread Starter — sleddinhusker Forum — Ski-Doo Replies — 1 Last Post — 02-03-2009 09:16 AM
Thread — No Boost Low elevation Apex Clutching Thread Starter — FBM Forum — Yamaha Replies — 0 Last Post — 01-05-2009 10:59 AM

All times are GMT -6. The time now is 02:51 PM.








no new posts