The AFRs were fine, we were seeing 11-10 on wot while on boost. We took the car to SRR to have it checked and the guys there said it was really good no det and there was room for more as the fueling was good.
The only problem was it is an auto so they had trouble getting a plot below 4000rpm. I have attached the the graphs to show the afrs & bhp. There was no det and it pulled really well. We had the normal dip in the afrs when it changed gear so we wired the pump 12volt.
I know what your saying Ian, when I built my car I would not of even considered running the stock ecu, I didnt even think it would run very well, but because this car was on a budget and we did it bit by bit we tried it and I was amazed how it performed.
My point is that if you dont want huge horse power but you want to go single it works. Obviously you are limited to what the stock injectors can flow but its perfect if you want just over 400bhp but the reliability of the stock setup. The stock ECU is alot more sophisticated than people realise, when you fit a piggyback there will always be a conflict between them as the stock ECU is trying to make corrections all the time.
We proved this by fitting emanage ulimate and 720cc injectors to this car, ok it now runs 445bhp at 1.05 bar of boost with much more potential to come but the fueling is a lot more erratic and its hard to get it to run right low down. So we have now put £1300 more into the car for 40bhp and compromissed the drivability. It was mint on the stock ECU, no fueling issues what so ever and started on the button.
Here is the link to the car if anyone is interested http://www.sussexjapclub.com/garage.php?mode=view_vehicle&CID=68
Sorry for the long post