We took it out to the back road where I run mine to test it and I have an approx. 1/4 mi. marked off there. It barely hit 85 mph in the 1/4. Just felt very sluggish all the way through the range.
I took my Dart to the track one time and was only going around 85 mph through the traps and it was sluggish and not RPMing very well. Turned out that I did not have my throttle cable ajusted right and the secondarys were not opening all the way. Don't know if that is it or not but it is easy to check any way.