I have 4 old (likely early 1980s) JFZ 4 piston calipers on my Lola 340 D S/R. The pistons are pitted and corroded and no longer usable. Unfortunately, replacements are unobtainium.
The closest I can find are some wilwood stainless steel pistons; the problem is that they are a few thousands too large diameter.
JFZ Piston 1.733 x .85
Wilwood 1.740 x .88
JFZ Bore 1.735 x .90
Does anyone know of a machinist that could bore the holes in the caliper halves to 1.742?
I've bought several used JFZ calipers on-line to try and scare up the right pistons but the used ones are worse than the ones I have.
Alternately, I am looking at some new Wilwood calipers but cannot find any that will spec for my 9.50 inch diameter rotors.
Thanks in advance for any assistance!
Kip