I've bought some denso plugs that I was told are equivalent ny9's. However googling tells me they are more like ny11's.
Engine: 1293cc, 11:1 comp. ratio, extensive head work with 45 weber. Car is running a little rich. I'm in Indonesia. Can I safely use these plugs?
Thanks
Michael

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67 Deluxe
Dry suspension
1293cc, 11:1 comp, RE 282 camshaft, 45 Weber, extractors etc
4 synchro close ratio gbox
Cooper S brakes, no booster
Stealth box, as Doc says "goes harder and idles!"
RH tank cos I needed it crossing the Nullarbor etc..

N11YC Champion plug is equivalent to an NGK BP5ES.
Many people here run this hotter plug, BP (or was it Bosch Australia?) recommended going 1 heat range hotter than original when running unleaded fuels, particularly in traffic.
I put BP5ES in my 1412 stroker (it was 10.5:1 C/R) and they are still going fine.
My 1360 (11.0:1) is running BPR6ES because I had a new set.

I would run yours, but keep an eye on the electrodes; if they blister the plug is perhaps too hot.

[edit] For track work though you would want a colder plug.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thanks for that Doc.
cheers

_________________
67 Deluxe
Dry suspension
1293cc, 11:1 comp, RE 282 camshaft, 45 Weber, extractors etc
4 synchro close ratio gbox
Cooper S brakes, no booster
Stealth box, as Doc says "goes harder and idles!"
RH tank cos I needed it crossing the Nullarbor etc..