Originally Posted by
Corse-R
The answer is clear, just remove .010mm shim and pay a look on the carb adjustment. Maybe you need to lean just a tad the LSN and the HSN.
You don't say which engine is an their size, but if you're running a 30% on a Nova .21 I would go to around 0.50 - 0.52mm of combustion chamber height (measure it with the crushed solder wire method). The same applies for a Ninja .21 engine.
You can go lower, but... you need to have guts and be ready for facing runtime problems, bitch carburetor adjustments (more critical) and maybe a rough but powerful engine.
Corse, thanks for your reply. It is a .21 Max. Theoretically speaking i am on the same page as you, but i keep hearing comments about how hard is to tune the engines there and i am sure the dry air (we are talking 15% humidity or maybe less) it's the main issue cause i have run at an altitute more or less like this one and no big problems. The report i have is that generally speaking, the people that have run there face big issues in order to have a consistant performance. It looks like the engine it's really sensitive, inconsistent and running on average hotter than in other places.