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Stock 120, 150, and Unlimited sled class comparisons include SC Nytro, & turning up the boost

rad Valves vs Stock reeds, Maxing out fuel flow with new PCV, adding more HP with pipe swap

GEORGE TAYLOR--74 year old George Taylor has died of heart failure. He had been a partner with DynoTech and American Snowmobiler Magazine for 22 years helping organize and orchestrate the annual stock sled Shootout in the Adirondack...

9/6 Charlie Bush, Polaris 700 triple HTG mod maxing out HP with fuel and timing tweaks 9/8 Adam Schmitt, Polaris 1000 triple HTG mod, maxing out HP with fuel and timing tweaks 9/9 Pete Nixon, AC800 twin, tuning for max winter HP in 28 degree F refrigerated air....

TURBO TIME AT THE ADIRONDACK SHOOTOUT   This is an invitation for all Arctic Cat Turbo commercial tuners/ modifiers/ manufacturers of mufflers, intercoolers, etc to bring a true trailable turbo Cat to this year’s AmSnow/DynoTech Research Shootout at Woodgate....

assess response time to achieve commanded A/F ratio, and assess accuracy

4/2 Pat Kitchen, Joe DiSpirito Cat 1500 triple asphalt sled 4/6 Jim Sigg 103ci H-D PCV tune (CycleDyn) 4/7 Don Puleo 107ci H-D PCV tune (CycleDyn) 4/12 Randy Crouse, Cat 1200 twin, tuning N2O 4/13 Heath Lynk Pol 1080 triple trail sled 4/13 Harry Jones Honda...

From Jim to Kevin Cameron:   If it's not too late, could "goin with the flow" [the name of the next tech article KC is writing for us explaining how fuel vaporization happens] also address sleds with EFI with injectors fitted to the throttle bodies, and maybe...

BAD OCTANE   Octane cheating either intentional or otherwise seems worse this season than ever before! Why do we suspect that? We can hear pump gas detonation on the dyno more this year than in years past! It appears that more than ever before, people come here...

test JDP 4 switch selection tunes with stock muffler, quiet trail muffler, and 3″ ID lakerace exhaust

big power increases shown with 3, 5, 7, and 8 psi boost. More left on the table!

D&D trailport hotrod package and quiet exhaust, tuned to max power on pump gas!

DNE 1700 quad, Mach Z 1000 twin, HTG 1080 triple–record HP is made on this day!

maximum pump gas HP with pump gas/ water methanol injection to suppress detonation

increase airflow and HP with exhaust and intake mods plus excellent PCV fuel tuning

compare all 120hp class & 150hp class sleds torque and hp with fuel tuning information

11/4 Dead one Dave tuning his new stock engine 2012 Procross 800 for max power for hilldrags. 11/7 WakPak Joe tuning a 1000 twin for hilldrags. 11/11 Sean Weir with a SnowCross 600 mod SkiDoo. Also Tom Bachly with a new 2012 bone stock SkiDoo 600RS,...

Dyno Terminology—Fresh and Refresh   The new SuperFlow 902 software has some subtle differences in channel headings in our test data compared to our original 25 year old  SuperFlow 901 software. For long term DTR members I need to clarify the difference, and...

we learn what it takes to increase the stock engine’s 180HP to over 600HP!

9/8 unnamed Cat F6 stock dragracer, PCV tuning for max HP 9/11 Frankie Amalphie Yam SX700 triple asphalt racer, PSI Modblasters 9/11 New Superflow coolant flowmeter arrived today! 9/12 Kevin and Nick Albright nostalgia sled tuning- two Merc 340 (one snowttwister,...