I searched the Technical and Jetting forums in vain on this subj. May be I got the spelling wrong or smth. The guys in the garage here go as far as having made for themselves custom alluminium St.John cross-looking like devices that they install between (actually inside) the carb and intake "for a proper fuel injection and burning". Does it really make any sense performance wise? Has anyone any experience with suchlike devices? PS: they call it "diffusor" !