Have you thought about putting the nitrous on a delay?
With simple WOT switch activation, you are spraying on top of the inertia spikes. Those inertia spikes only last half a second or on average, but there are 4 of them on a 4spd car and spraying anything on top of them requires more clutch clamp pressure to hold an even larger spike. Spraying on top of spikes not only reduces how much total one can spray, but adding clamp pressure to hold a bigger nitrous enhanced spike also makes the car harder to launch NA.
A nitrous delay basically allows the nitrous to come in on the heels of the inertia spikes, instead of adding to them. The idea is to use the nitrous to fill the gaps BETWEEN inertia spikes without making the spikes themselves bigger. Adding delay can allow a 10sec 175 shot simple WOT switch car to spray at least twice as much between the spikes without increasing the peak impact numbers sent to the drivetrain. That means you can spray more before reaching the threshold that either hurts the transmission, blows thru the clutch, or knocks the tires loose. When you reduce it down to numbers, which scenario do you think would be quicker for that 10sec car?....
...spray 175 for the full 10 seconds, 175hp nitrous x 10 seconds = 1750
...spray 350 for just the 8 seconds between spikes, 350hp nitrous x 8 seconds = 2800
In this example, that's 66% more nitrous assist without increasing peak impact on the drivetrain.
Here's a link to one of my pages with more detail... ClutchTamer.com
Grant