+15 piston rings

[lottex]

Rebuilding an S2 engine, thats been bored in the past to +15 and it came with got a very good set of +15 pistons, struggling to find new rings to fit. Have tried the usual suspects. Any thoughts? or has anyone got a set they’d be willing to part with. Have been told could successfully mod +20 rings as a plan B ...Thanks, Pete

[Craven]

Try here https://www.fwthornton.co.uk
No problem in fitting +20 you need to re-gap to spec, from memory it’s about 0.006 – 0.009 place ring in bore use piston to ensure square in bore and use feeler gauge to set gap you will need a stone ideal Dremel, very hard and brittle material. Quite a long Job 4 pistons 3 rings.

[reds4se]

I think i might have a set of new old stock +15 rings, i will check in the morning and if i have will send you a p.m.
Rich.

[lottex]

Thanks for the very useful responses.
Rich, if you can help re a set of +15 rings, that would be great.
All the best, Peter