Food for thought: adding a tank, high pressure lines, solinoids, fuel pumps and wiring is going to gain you at least 30-40 pounds for that 15-25 hp momentary boost. All the while one failed component or minor misadjustment will cause catastrophic engine failure and probable fire.

There are better ways to increase horsepower or overcome DA issues.

I've seen too many cars burn from nitrous. It's not for me, thanks.