Hi Atul,
We are a little off topic now, but what the ,, .
Anyway it sounds like your tuned set up is a bit short .
If you extend it , you may loose a little off the top end but it should transition better, and it will hold on better under load in the verticals.
Guys the cooler running is a direct consequence of the higher vaporization temp (higher boiling point) of the Nitro.
I know it sounds wrong but that is the case.

Brian