Finally got a cance to put the Evo4 on the track motor is fantastic plenty of power pulled a 16.5 lap & came off the track @ 200 deg leaned it out & tighten the clutch down a 1/2 turn to get more bottom end pulled a 16.1 @240 degree I commonly like to run my sirio's @ 270 but with it being a fresh motor I played it safe & will crank it down a little more @ the next race motor was tested this weekend @ kissimmee raceway & I can't wait to see what it will feel like @ 270deg