yeah i agree maintaining the top end wouldn't be good for the car, i just would like to see if finally max out instead of knowing u had like 700more rpm to go.
I think at low ends its only off by about 1 b/c when i drive by those police speed machines that show ur speed its usually lower by 1 at around 45. I'd say around 130-140 maybe -5mph? does that sound reasonable? unless u have aftermarket gauges that are possibly thread better.