2006 Michigan Tech Clean Snowmobile Matt Prusak - Team Leader Wes Barrett – Vice President

Concept “Design and build a clean, quiet, reliable, high-performance snowmobile that is enjoyable to ride in a wide variety of conditions, and can be operated by a wide range of enthusiasts.”

Outline -Why is the MTU Clean Snowmobile superior to current technology? -Consumer Perspective -High-Performance -Environmental Perspective -Low Noise -Low Emissions -Dealer/Outfitter Perspective -Durable -Low Cost -High Resale Value

Performance - Engine Consumer Perspective ’03 Honda CBR 954RR –4-cycle –4-cylinder –4 valves per cylinder –Electronic Fuel Injection –113kW (152 rwhp) in OEM trim

Performance – Chassis Consumer Perspective Premium suspension components –Fox Float front shocks used Highly tunable –Rear suspension spring and damping rates modified Extensive on-trail Calibration –Multiple-rider input for 200 miles –Calibrated for best possible compromise between bump absorption, and weight transfer for a wide range of users, from beginner to expert

Emissions Development Environmental Perspective Why use a four-stroke engine? –The numbers don’t lie

Emissions Strategy Team-Designed Exhaust System –Emitec Catalytic Converter Installed Power Commander Piggyback EFI Modifier –Used to Modify OEM Fuel Map Significant reductions in tailpipe emissions compared to OEM engine calibration –96.6% Average Reduction in HC –97.2% Average Reduction in CO –93.1% Average Reduction in NOx –Stoichiometric Operating Conditions

Emissions Development

Noise Reduction Environmental Perspective How? Team designed Helical Gearbox Intake silencer 2 piece muffling system –Primary Supercritical muffler –Secondary glass pack to absorb high frequency noise Closed off hood vents Sound absorbing material in belly-pan Minimized idler wheels in rear suspension Made Use of Arctic Cat style Quiet Track Technology

Noise Reduction Testing Environmental Perspective Secondary Muffler Testing Selections: –Long Red GP – 83.1 dBA –Good combination of noise and power output

J-192 Field Testing Noise Reduction Testing Environmental Perspective Selections from testing: –Covered Silenced Intake – 74.5 dBA –Closed Hood Vents – 73.5 dBA

Built on a Polaris Pro-X race driven Chassis – Torture tested for over 200 miles on ungroomed trails Powered by a race proven Honda 954cc High Performance street bike engine –Dyno Tested for over 100 hrs –Constant 10 minute intervals at mode 1 calibration point Durability Dealer/Outfitter Perspective

Cost Analysis Dealer/Outfitter Perspective 2006 TICA –Total Implementation Cost Analysis (TICA) of $ –Coming in at around $ makes it cheaper than the new 4- strokes when added to price of Stock 600 Polaris Highly tuned 4-stroke Engine –Consumes Less fuel than stock – Approx. 14 mpg Maintenance Free –Fouling spark plugs isn’t even considered –Uses no oil, changing oil/filter seasonally

Questions?