ok so i got around to a mod yesterday...

Thanks Ron, I was unaware of the cowl on cowl off tuning until this issue, im new to gas. I have forgotten my ideas of a holeless cowl with this issue and plan on tuning cowl on before flying next...
Yes the engine was sagging in the air after engine tuning cowl on, so looking at heating, everyone said it went lean.....as it sounded sagging, but io think it could well have also gone rich.... not hitting peak rpm. Im leaning towards lean as the engine cut out in flight..... overheating...and it was a super hot day..


before....


after.....



your thoughts would be welcome!

I wanted to change the second opening(exhaust) into less of an air in as can be seen in the last pic of the "before"
I closed up that hole and opened up the 3rd hole into an air dam with following Lovre reinforcing the low pressure.

I should definitely see a huge difference here I think.....