Only just noticed this thread while i was searching for a different nitrous thread.



Difficult for anyone to give you an answer to the "how much can i add" question as different engines stop responding to more gas for a variety of reasons, could be your exhaust restricts flow for example, or if you arent on big enough coil packs or CDi unit it might be the spark that cant cope.

In terms of cleanly burning without Det pretty much any turbo engine can take a 25% increase without any sweat at all as the cooling effect is so massive that it potentially allows HIGHER cr (or more timing) than off gas.


As Rod says though, its not down to wether the engine will cope, its wether the drivetrain will as the torque figures involved on turbo motors can get absolutely silly!