NOS--should I??
How will colder plugs effect my performance when I am not on the bottle?
On a 150 shot, 1 heat range colder should be fine, Nitrous is to some very risky, but if you keep the tune right & plenty of fuel supply, your engine will be just fine, You really want to pull timing too prevent detination, along with higher octane & plug heat range & gap, these 3 work together as the majority of the tune, you can get away with pulling less timing as the octane goes up & the plugs get colder along with a richer tune, but to play it safe, pull 2* for every 50 hp shot, so a bare minimum of 5* from where your at now, don't just guess, if your good NA at 36*, run it at 30* for a 150, run 1 heat range colder & tighten the gap too .033" or .035" max, I like NGKs the best for there easy reading & the way they burn on the Nitrous, Just remember, the higher the Number on an NGK, the "colder" the heat range, so a -6 is hotter then a -8, Make sure the fuel system can keep up with the demand, It wouldn't hurt running a mix or 50/50 of 93/110.
On a 150, your on the raggid edge of needing a dedicated line for the plate, If you know your pump will supply the total needs of both engine/N2o i'd run 2 regulators from the main line, 1 for the engine @ a set pressure, the other for the plate, then set the pressure flowing the fuel through the plate in a bucket.
Your at 525 HP NA, so you add 150, that 675 HP, You'll need a single pump that will comfortably supply enough fuel for 750-800 HP, I know a holley black is close too this, It'll free flow a gallon through a 3/8" line in 22 seconds.
Forgot to add, WOT switch on your linkage is the best set-up, you don't want to be pushing a button if you ever choose 2 hit the button at low throttle or even 1/2 throttle, you risk damage not being at WOT when the N2o starts flowing.