Originally posted by Lung
Sorry, forgot to mention that I'm in Jakarta and the temp normally runs from 28 - 32 deg C without much rain these days.
I use Tornado 25% nitro fuel for our local track that is pretty much wide open with long straights.
When I first bought the engine, the hobby shop installed a shim (3mm). The local hobby shop says that there is now a 4 mm piston clearance. So should I remove the original shim or not?
Oh, NEVER remove that 3mm shims.....you are running 25-30% fuel, to make the engine last longer, you SUPPOSE to add the extra 1mm or even 2mm shims so the COMPRESSION will not be too aggressive....but since your engine is fully ran and is in good condition with the original 3mm, I would leave it alone UNTILL you step up for 30% nitro....if so, I will add the extra 1mm shim for better protection...
Afterall, $350 Nova Max should not be abuse, it is not a cheap engine afterall...........but for sure, they are ROCKET.