Sorry but this is a very urgent question. I am in the Classic Adelaide Targa tarmac rally next week and have just discovered a serious issue.
I have R33 GTR turbo rear calipers on the rear of my car. The caliper body is hitting on the rim without me realising (wheels put on by others whilst on a dolly so nobody realised!!). How much can I grind off the edge of the caliper body in the area shown in the attached pic (ie the edge of that roundish bit)? I really need to remove 3-4 mm.
Has anybody done this or pulled one apart and knows the answer?