[BuzzardChaser]

Hello Mark,
I have a Composite arf 2.6 meter with a BME 115 with cans (see attached photos). My problem is every time I do a Knife Edge or go inverted the engine drops rpm.
Things I’ve done to try and correct:
1. Ported a line from the carb housing into the planes fuse (see nipple on carb) with no difference in engine performance.
2. Cupped the hole in the exterior of the cowl under the carb (see photo) with temporary balsa to prevent any airflow problems into the carb. No difference at all.
3. Sealed it completely and same thing, no difference in performance.
4. Check for any air in my lines.
Engine has about 5 gals now and otherwise is running really good and strong. No hesitation anywhere with good transition to WOT @ about 6700rpm. Starts good too.
Problem seems to get better as I richen the high needle. Can you help me?
Thanks!!