an example of a 970kg car with k03s, chipped up as much as you can, 220bhp/250lb (real power) on soft toyo R888 rubbber with proper GPS V-Box timing gear for magazine shoot. 5.4sec 0-60
very much agree high power does'nt neccessarily make for lower 0-60 as traction is significant issue. Factor in some tyres made to grip however and there's time to be had. eg. James Hodsons mk2 Golf, IHI which did 4.2s 0-60 from 380bhp and very light car.
ibiza on k03s just is'nt going to get this.
accelerometer devices are very much influenced by inputed vehicle weight (
ibiza's aint their book weight), tilt factors and the like.
I have Racelogic V-Box myself, not done much with it, but have seen 8.7sec to 100mph on it whilst playing on way back from Combe last track day. GPS logged timing I will believe, acceleromter type I wont. (too susceptable to user inputting inaccurate info & settings)