I'm not sure this [1] is what you're talking about but it reminded me of reading about pre-combustion chambers in diesel cylinders. Interesting stuff. [1] ht

I'm not sure this [1] is what you're talking about but it reminded me of reading about pre-combustion chambers in diesel cylinders. Interesting stuff. [1] https://en.wikipedia.org/wiki/Indirect_injection#Classification_of_indirect_combustion_chambers https://en.wikipedia.org/wiki/Indirect_injection#Classificat...