Morning folks. I am going to buy a bottom end with 83 mm bores. We don't think it's GTI Eng. as the block is original black not blue. I hope it is TSR. Were TSR motors given any identification marks? Regards, Dave.
My first TSR unit had a black block ... I never looked for specific I.D though. The current unit has the blue but is a bit too far away to see for I.D.
?BLUE = GTI ENG.? Get a better camera with an uber big tele lens then. Get a decent macro lens as well cos the photo of your GT3 front boot is rubbish for detailed research.