'09 Corvette ZR1 speeds with Nos

[firewire6587]

I got up to 286 mph with Nos and all upgrades performed already, is there anyway to make it go over 300 mph ?
if so,what can be done to achieve this ?

 

[firewire6587]

my fault wrong section.

 

[kukenjitsu]

Remove the flat floor if you have one, use racing soft tires (or the softest possible); For top speed in the ZR1 you want to be at 7,000 rpm, that's where you get the most power.