My engine is close to detonation already - I currently use a 98.6 Octane fuel which is the best stuff we can get over here.

I have stand alone fuel management so I can reprogram it myself with a laptop. One thing I thought about doing is connecting the nitrous system to the air induction temperature sensor. When the nitrous is in use, I could set it up to earth the sensor which will throw out a strange valve to the ECU. I could then set it to adjust the ignition and fuelling to suit the nitrous when it sees this value.

This is all theory at the moment and I need to do a few tests, but if it works, I could run a dry system and simply add more fuel directly from the current injectors.

My engine can take 350bhp as it is, so I guess I could add up to another 100bhp. The only thing limiting my engine's strength is the conrods. I need to get steel ones to go any further than that.

What Octane fuel do you guys have over there? Oh - over here fuel is expensive - one litre is $1.24 ($5.64 a gallon)