not being funny but surley the easiest way would be to put a 2 litre in and build on that,i would have thought this would have been a good starting point? Also tried putting a 2 litre throttle body on my 1.8 si and found all it did was make the A pedal sit lower and drink copeus amounts of fuel not impressed But then someone told me thats because i didnt use a cone filter as ive still got the air box on but its just been drilled