03-09-2018, 08:05 AM
Thanks fellahs. If it can be persuaded to read reliably a digital voltmeter would detect the knee much as Charle’s device. If anyone can acquire a known good sensor it could cost nothing to experiment.
Sorry to bore most on this forum but books reckon mixture distribution esp with carbs usually differs by one ratio or so between cyls. (which is presumably why some valve seats in my 1960s car recess faster than others). With a four each discharge is more or less independent. With a detector in the manifold any exhaust with free oxygen would have little chance to combine with CO from other cyls. The reading is an average of some sort but with the very non linear response just what the very precise readings really mean I dunno.
(I referred to single wire but now gather some unheated units have two wires.)
Sorry to bore most on this forum but books reckon mixture distribution esp with carbs usually differs by one ratio or so between cyls. (which is presumably why some valve seats in my 1960s car recess faster than others). With a four each discharge is more or less independent. With a detector in the manifold any exhaust with free oxygen would have little chance to combine with CO from other cyls. The reading is an average of some sort but with the very non linear response just what the very precise readings really mean I dunno.
(I referred to single wire but now gather some unheated units have two wires.)