At my local track there is one particular off camber turn, and another particular turn that has a dip (nothing major) at the apex and then climbs in elevation in the exit. Both places have been trouble for me from day one in terms of engine tuning. I cannot figure out why the engine pops in these places. There have been a couple rare occurrences where popping was minimal, but i am not able to connect the dots as to why the problem occurs. Lifting on the throttle for a second and then rolling back into it allows you to keep going (filling the bowl back up?).
A little info, may be relevant, may not be:
-Local rotax guys have made no progress, nor have I.
-I am running an 8.5 with 5.2g floats
-I haven’t tried jetting outside 1 or 2 jets away from JetTech recommended.
-Carb is cleaned (although not ultrasonic), fuel pump, filter, plug, etc all replaced on a very regular basis. No difference after replacement/cleaning.
-Fuel is good ol’ ethanol laced pump gas with redline oil. Going to switch to E0 pump, but what little I understand about fuel I doubt this will make a difference.
-engine has about 14hrs on top end and 35+? on bottom.