Originally Posted by MMZ_TimeLord
Hey Woody,
I realize this thread is about 6 months old... but you should maybe check these guys out... you too HDDP.
AutoEnginuity
Their scan tool is just a scan tool... but it supports most if not all ODBII and CAN stuff out there and comes with their 'SpeedTracer' software for doing on the drive dyno data pulls.
I may get their basic kit just for kicks... as it's pretty cheap.

Thanks TimeLord, I have already built a scantool based on the ELM 327 chip and it works a treat! Cost me about 25GBP to make. The biggest problem was finding out which protocol the car used. There are loads of these about now but most of the DIY stuff are ELM based and there are alot of people buying them in reboxing them and charging far too much for them. Sometimes you are paying for their front end software but there is tons of open source stuff that works perfectly well.