On level ground I can shift at 60 but I don't grab a handful of throttle. I usually do 65 & over to make sure I don't lug that mother.

 

55 MPH with no problem at all, sometimes 50. No lugging. It couldn't do that before the T-Max went in.

 

I'm probably like most here.... 55 to 60 or so. Usually don't use it unless I'm on the freeway.

 

70 + and no lower.

 

Even with stg 1 it didn't pull 6th till 65+, below that motor just laboered and felt like needed to give her gas and mileage suffered.
Now with the cams it pulls as low as 58 with ease and mileage increase 3-4 mpgs when using 6th. really smooth and plenty of roll on power at 62, bout like 5th used to be at 55mph.

 

Usually 55 to 60, depending on the grade of the road.

 

Anything above 50 MPH. If I need to accelerate hard I'll drop down a gear or two. If I roll on smoothly the 96" will take it in stride.

 

55 and no issues lugging. I can still accelerate lightly. I"m surprised to hear those that complain about lugging. I only have a stage 1 on it.

 

65 - 70

 

65, bike lugs if slower