done exactly that last time he mapped mine but squeezed an extra 17bhp as the timing was that far out as i done it by eye lol
oh and when you say piper 270s arnt actual 270 duration its just the model, and 285s arnt 285 duration either -
http://www.pipercams.co.uk/pipercams...n=8&engine=268
where as my newmans both are 270 duration and 10.79mm lift