I recently came across and article where a guy uses an exhaust gas analyzer with O2 wide band sensors for real " tuning" of his SU's. By monitoring the analyzer at different throttle settings. He can determine if the engine is running lean or rich at those settings. that way he can better determine the needle selection by comparing other needle profiles. Has anyone heard of this or tried it? I'm thinking of this for my PV544 but this would abvoiusly work on any carburated engine. I hqave posted in the 444/544 forum with only one response so now I'm trying this forum hoping for a better response
Steve in Canada