Originally Posted by 376LSX
7. Try running no air cleaner
8. Remove restrictor on opening of carb
You seem to be pretty experienced in nitro, what told you that these ideas would be good? Just asking, because running w/o an air filter usually means dust and stuff gets inside the engine, which is...just bad and usually voids the warranty. Also, the carb settings rely on the restrictor, if you remove that you change the carb completely.
There's a playlist of videos on the Octane kit page http://www.hpiracing.com/en/kit/109073
that detail what to do in the case of problems, plus a really detailed PDF (just updated today). The spark plug gap should be between 0.3mm and 0.4mm and there's now a really detailed series of steps that tell you how to test the CDI unit.
Most people on Youtube are adjusting the carb as if they're working on a nitro engine, which is not good - the high speed needle (and only the high speed needle) should be adjusted no more than 1/24 of a turn, not a 1/4 turn or more like some people are doing. See the Hemistorm videos for what he's figured out on tuning: https://www.youtube.com/watch?v=yWQytW84F14
(basically, he ran a high-oil mix, tuned it 1/36 of a turn at a time and the engine was still breaking in after 20+ tanks) - here is his truck as of a few days ago: https://www.youtube.com/watch?v=GtkiIup_TfU