I'm well aware that you can't really compare dynos but I'm just curious to know if Star and Dastek rollers give similar results. I keep reading on Scoobynet that a VF23 turbo is good for 330 bhp (proven on actual runs so presumably at Star as Dastek is new) whereas my car with VF23, APS fmic, GruppeS, APS caik, 550s, Apexi PFC and AVC-R with AndyF map etc etc etc gave me 305 bhp at Dastek (Dalgety Bay). I must admit that I was expecting around 330 and am wondering if the difference is down to the different rollers. Anybody had experience of both?