When I looked for FOD screens for my Olympus I was told that larger turbines do not tolerate airflow limitations imposed by FOD screens - is there any truth to this?
I've tried a home made, rather corse mesh FOD guard on my P180 with no increase in EGT or acceleration time. i.e. it works fine. After meeting Olivier "OLNICO" who has made quite a few test with P200's, I tried a std 160 eng. FOD guard from Ali. It worked as good as my home made one. Only marginal increase in EGT with <10C.
So I'll stick with the finer mesh as it seems not to impose any significant decrease in performance.
My 2 cents