Prior to being mapped the cars powerband was noticeably bias towards the top end, but the v.i.s is working fine and the car was never lacking power low down. The car has been improved no end by Reidys remap, I'll post up more tomorrow and graphs+videos
any updates ?....
both the power biased towards the top end and your torque graph are not quite normal, if your vis is ok ( how do you know ?), then something else isn't...not saying your cars poor to drive but something is deffinitely not quite the norm.
I have lots of zs 180 power graphs from loads of different zs with lots of different specs and they are all the same shape, torque peaks in the mid range at approx 4250 then starts to tail off....270 cams help torque to hold longer and higher up the revs but peak torque doesnt' move up the rev range and you dont lose low end torque.
Mine was producing max torque higher up the rev band (5k or around there - should really dig out info) to keen to see how it fares against another reidy car.