[Russ Dickey]

I used to have a 125 powershot kit (10lb bottle) on my '66 Mustang. Car has a mild 289 w/ C4 auto and 4.11 gears. I would hit the nitrous shortly after launch (once car had solidly hooked up), and stay on it all the way down the track. The car ran low 13's, and the bottle would last 7-10 passes (although as Jerry mentioned, the lower the bottle got, the slower the car got).

I only used it on the street when I felt that a stoplight challenge loss was inevitable.