I'm contemplating to upgrade my pistons and conrods during the spring (after getting a new ECU) and was wondering on the effects that it could have. After having spoken to Ralliart Germany (we can do the work, but won't start the car unless it's a Motec. Thanks a lot!), I wonder what would need to be changed on the ECU map after having fitted wider pistons and new conrods. I suppose the fuelling would have to be altered a little because of the different size of the combustion chamber, maybe even the timing. But shouldn't the car at least run? To be fair that's what Ralliart Germany said, that the car would probably run, but not smoothly. I'm a bit disappointed that these professionals say they won't be able to adjust the GEMS, although I think that the changes would have to be minor and I think the interface should be similar to the Motec.