Ramp

Grinding

Desired Outcome

Blackjack Racing 2012

1 2 Lane 3 4

Hauck M Laundry Name M Rempel M Thies

18 66 Entry 196 223

0.510 0.456 Rt. 0.504 0.455

1.428 0.000 60 ft. 1.441 1.456

5.705 8.956 Et. 5.767 5.832

1st 4th Place 2nd 3rd

0.000 -3.187 Mov. 0.056 0.072

Ski-doo clutch operation

Typical Practice Day x 10?

Typical Practice Day Results

Typical available parts to choose

from Picture of parts to choose

ProblemDon’t

have a perfect

part

Grind our own rampsHOW TO GRIND IT?

WHERE AND HOW MUCH TO GRIND?

What tool to use Very limited

resources on line Some of the

information is secretive

“You will screw it up”

“You will ruin a lot of sets”

Resources Tool: Stefans Project ConsultingJunk store in Grand ForksMyrdal Orthepedic TechnologiesEcono AbrasivesWhere to grindSki-doo race manuals Garth Race tech from Blair Morgan race teamBranko Hotrod sled shopDean Klatt –Ski-doo racerFAST training video on Ski-doo clutchingGils Engineering

Spindle sander

Where to grind

End result

Two main goals

Modify the engagement

Modify how hard we load the motor during part of the shift

Major clutch components

Engagement Modification

Modification of part of the ramp

Progress Will be able to grind a engagement notch

Will be able to tell where the roller sits on the ramp

Can grind a nice smooth profile

May finish one or two sets

Will modify some one small step a time

Reflection

Not happy with sanding discs available

Sort of need a track dyno

Can’t tell till we get on the track

Research is never finished

Final Reflection