cuttinties
ArboristSite Guru
I used a lot of pop ups when I first started.
I wonder if it caused this detonation issue? It seems that the edge of the popup could possibly divide the flame front and leave unburnt gases at the outer edge that could cause detonation.
Laminar flow works with or against. With no strato ports separation of burnt and unburnt is less, so detonation is a possibility with a pop up. Get a little pooling on the flat side of the piston and bang.
All speculation of course. I'm just butt hurt you're hoarding 262s.