Been off on holiday for a couple of weeks, but I'm glad to see that this has provoked a debate about (and hopefully some testing of!) these chips. To throw another idea into the mix, would it be worth trying to hire a rolling road for the participants for the day - time and location to coincide with a nation meet? Might prove expensive, but I guess that at least all the cars and chips would be tested under identical conditions.
A quick update on where I am - I got back off holiday yesterday and picked up my car from my folks' house in Manchester, and drove back to Sheffield. Idle was sounding a bit unsteady and rich appeared to be running very rich. Whilst driving I still got a lot of popping on downshift, and it also started to pop a little under acceleration and lift off the throttle.
Ths morning I've gone back to the original ECU for now. It's weird - although the chip made the car feel a bit more eagar, and slightly smoother on acceleration, having the original chip back in is like putting on a pair of old slippers! I guess that setting the CO correctly with the chipped ECU could have stopped the overfuelling, but I'm back at work soon, so don't really have time to experiment - plus I don't want to pay a garage to adjust the CO once for the chipped ECU and once again to change it back if it still isn't right.
I might look at this again when I have more time, but good luck to the experimenters, and I look forward to seeing your results, which will hopefully end the arguements about chipping the Digi once and for all!
