That will make a great contribution to the forum. But unfortunately no one but you can do that since we don't have top speed limiter removed here stateside.
Do you have a Vbox? Why not bring a Vbox with you to Germany and do some real tests, and actually confirm your topspeed with the GPS of the Vbox. Going on your speedometer is useless. Tell us what you do 0 to 100mph, 60 to 130mph etc. That will make the best possible contribution.
