Geoff,
Working on a now very limited budget I'm throwing out worries, possibilities and options to gain opinions before throwing cash at them.
I couldn't work out how the wear occurred where it has. Opinion is, rather than engine block problems, that it was poor machining when the liners were originally installed.
On the options front I can replace the liners and reuse the split skirt pistons my specialist doesn't like, use JP pistons, 9.0:1 Hepolite or 9.5:1 Cosworth pistons at ascending cost; or rebore to plus 10 thou and install JP pistons or Cosworth (presumably). At a higher cost I can even get new pistons made. There may be other options but I haven't discovered them yet.
I have no idea why he doesn't like them. Possibly because they are not recommended for racing?
We have 95 & 98 octane here and I have no problems running my Gold Star (9.5:1) on 95, hence the consideration as the pistons are available.
If other pistons are available in the UK I would like to know and whether it is safe to rebore the liners as Bristol's didn't recommend it.
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