Track Speed

[silberpro]

What kind of track speeds are you getting? ( In the powder ) no poaching
Turbo
Controller
Intercooled
Boost
Track size
Track Type
Any other info you can think of would be great

Happy blog racing

 

[philsummers21]

Deep snow while pulling a hill 60 mph
Boondockers intercooler kit 10.5 # at 9000 ft
163 peak 2.5
19/42 gearing and 7 tooth drivers

 

[silberpro]

Thats working well.

 

[philsummers21]

It goes pretty good. Ive been trying to get a little more but just cant. Think that peak is just too heavy, sure grips tho. Little far from my tapex that would pull 98mph track speed. Be curious to see what others are getting.

Pro is a hell of alot easier to ride tho.

 

[snosfun]

I was getting 63 mph with 13 silber kit stock gears 155 stock track 8000 ft @ 7 boost early in season. Haven't checked for a while.

Sent from my SCH-S720C using Tapatalk 2

 

[rcb]

52 mph track speed

Last week in revy in huge snow
155. 13 pro. 8 psi

 

[Catmydoo]

64 Mph in fresh snow pulling a long hill.
2013 pro Le 163 stock track
Intercooled BD kit
gtx 2863 turbo
13 psi
4000-8000ft

I think there is more track speed in it. I can't wait for my extroverts to show up so I don't have to run my track like a guitar string. Would also like to play with some taller pulley combos when they become available.

 

[silberpro]

What would a stock pro pull for track speed?

 

[Duramax325]

45-48 mph

 

[powerfuldodge]

What would a stock pro pull for track speed?

I have a 2013 800 pro rmk 155 all stock . Just came back from valemount with 2-3ft of powder on some pretty good inclines track speed 45mph and 8225rpm. Sled is brand new first time put. I have a Carl's cycle clutch kit on the way and will see if that's makes any difference

 

[Dirty10]

2012 PRO RMK 163 2013 silber turbo 9lb, a little low on RPM 8125, 24 plus new powder 12.6 on AFR 51 MPH

 

[silberpro]

So how many RPM do you think a turbo Pro works best?

 

[Catmydoo]

My 13 only pulled around 40 mph stock in our heavy snow.

 

[snosfun]

I think mine stock was pulling around 42 mph most of the time.
In my post above it was in dry fluff with no base so maybe not a good test.
But that was the only time I have checked track speed & need to test again.

 

[BlowinSmoke]

Running a 2012 pro with a 163 track. Installed a 2012 Silber kit with 2013 electronics upgrade and EBC system. Riding western Montana at 5000-9000 elevation with EBC system set to 6 PSI boost. Geared down sled to 19-42 which is showing 56-58 MPH track speed in deep powder with no base.

Primary clutch temp is 86 degrees and Secondary was 100.6 degrees after several repeated pulls on the hill busting pow pow.

Stock 2013 pro 163 had primary temps of 122 deg. and secondary also was 121 deg. on the same hill with 46 MPH track speed.

 

[silberpro]

After the gear change do you still have correct track speed?
What vents are you running.
Like the clutch temps.

 

[philsummers21]

After the gear change do you still have correct track speed?
What vents are you running.
Like the clutch temps.

Should still have accurate mph with gear change but not with 7 tooth drivers. Will be reading higher mph then stock. How much higher i do not know

 

[WaBackcountry]

Who's got the equation for trackspeed with 7 tooths.

 

[High Velocity]

I may be wrong, but 7T drivers (3" pitch) vs 8T drivers (3" pitch) works out to a .083 reduction. So my sled (N/A with 162 x 3, 7T drivers) shows 39 mph, but it's actually 35.76 mph.

Actually, I may have got this wrong. Stock 8T X 2.86 have a circumference of 22.88". 7T X 3 = 21"". 21 divided by 22.88 = 0.917.
Indicated track speed on my 3" of 39 mph X 0.917 = 35.795 mph.


Sent from my iPad when I should be sledding.

 

[silberpro]

Looks like that 3 inch really knocks track speed down on a NA sled.
Tried a 162 x 3 inch on a turbo sled. Love that track
Going to have to get one soon.