Sorry to be a skeptic but I believe that it is far more involved then you make it sound. Most of the lower cost EFI systems that I have seen work good at WOT but when cold or during partial throttle they do not seem to function as good as the stock EFI. Maybe good for the track but not exactly what I want on my daily driver. I just want people to be aware of the sacrifices that would be because I do not believe it is as easy as you make it sound.

And just adding more cam and a larger throttle body seems like it would not make such a dramatic difference on an R series motor since my understanding is that the head does not flow well enough to support huge throttle bodies or radical cams. Maybe in the upper RPMs though...

Do you have any dyno numbers for specific combinations you have used?