Turbo4wd & Peter I think the Dyno day at C&V showed why you need to do the proper tune. The base car was a very strong example of an Xr6-t and when fitted with the UNICHIP and standard interceptor maps produced great power, however was very much on the lean side and would be unwise to leave it that way. So after some remapping power came down but the air fuel was at safe levels. One thing I got out of the day in Sydney was that there are lots of limiting factors with the T and they need to be considered as a whole and in the correct or appropriate order. There is heaps of people with opinions on this but if you consider it in steps of ECU, injectors, exhaust, fuel delivery etc etc it is very effective....all depends what you want as an end point. The other thing is that in many ways the UNICHIP is a leveller for many cars, it will have the effect of compensating for some of the variations in production T's that are out there. My humble opinion. Peter, Lok and others... keep answering the questions...thanks