Ralf aint wrong.
Nitrous is a laugh, but for a decent system it's gonna cost the best part of £1000, well for little over that you could fit a Turbo, and at least that way you, as Ralf said, get the power all the time.
You don't have to bother refilling a Turbo / Supercharger up all the time.
And also, Nitrous is illegal for road use, whereas getting the beneifts of a 100HP Turbo isn't.
