The m2b4's 2nd gear tops at about 63mph on our preludes. When Ii went to brooksville to autocross Ii only used 3rd gear for a few seconds. I ended the run topping out 2nd.

Its really hard trying to match your gearing/setup to whatever track your on, so like loren said, a good avg. is about 65 mph in 2nd gear.

whats your current MPH per gear?