Alright guys,
I had a tip from a mate of mine that if you add a standard measure, pre-diluted in 2L of petrol, to the tank every time you fill up, it will increase performance significantly.
I have to say, I've tried it and it definitely works, probably about 0.5s off the 0-62 - but there is knocking coming from the engine.
I also fitted a K&N 77 Series intake kit to my 1.2L Corsa at the same time as trying this, so I'm not sure which one is causing the knocking.
Any ideas on where to start?
Les