When used correctly, N20 is safe.
Read up about it (a real book, not just the net).
Properly tuned you can get alot of bang for your buck.
With a 75HP dry shot I cut 2+ seconds off my 1/4 mile.
(BTW, dry rates at the crank, wet rates at the wheels)
And for a low power shot, run a dry kit.
Add a few safety precautions (rpm cut-off switch, fuel pressure cut off switch) and you'll be safe.
