Sometimes the ideas with the best intentions have a habit of biting you!

When I initally got the car it came with Wilwood 4 pots up front along with 283mm discs with writing on it to confirm. However, it is still on the stock S1 wheels and in order to clear the calipers it had some wonderful Grayston spacers fitted. Great for showing off the 4 pots, not so great for putting the wheel on, potentially causing vibrations in addition to the wheels catching the arches on some occasions.

My RST is still on the stock wheels but it is on trackday esque tyres, which are a tad wider. This may have exaggerated the issue somewhat! With the wheelbolts having less threads I saw a few options:

1) Try another set of calipers
2) Trim the arches, and get some new front wheel bolts.

I decided for some reason to go with option 1. So with delight I bagged a set of 4x4 Cosworth calipers. Great I thought. Fit 'em on, job done.

Whilst they do fit and the wheel now clears the caliper without spacers etc. I have another issue. Unless I fit the carrier in a certain way it does catch the disc. With the caliper on I think it does. It is not enough to stop the wheel spinning but IMO it is catching.

Have any of you peeps come across this issue before? Looking at the calipers it seems this issue has happened with these calipers previously judging by the groove marks. Do I carry on or alter the discs (or buy another set) or grind a tad more from the calipers?

Here are pics showing the issue:



Note the grooves in the carrier:








Any help would be appreciated .