Over the last couple of years ive modified the Si and had it on the RR each time so see what improvements they made, rather than look at a number different sheets ive had a play with excel and put them all on one graph to show any one interested in the various improvements.

to add some more info
standard 2 litre silvertop
2 litre, Ashley 4 branch manifold, decat pipe, cone filter & ali cross over pipe.
2 litre, Ashley 4 branch manifold, decat pipe, individual GSXR600 throttle bodies, cone filter,
2 litre, Ashley 4 branch manifold, decat pipe, individual GSXR750 throttle bodies, 270 cams, DIY ported head Emerald ECU.