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TR2/3/3A TR3A SU H6...stock.needles?

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.100"
 
Thanks Randall Are you familiar with the 14 or so Stations on the SU needle?There must be a correlation between engine rpm and SU station and if so I was wondering if it's known at what station the needle would be at 3000 rpm which would be the point at which my cam seems to "kick in"? Possibly Station 7 ??? I realize that this is a rather simplistic way of choosing a a needle and that an O2 sensor and computer graph is the way to go but I was just wondering after comparing the SM and RH needles on the Teglerizer site.
 
Sorry, Karl, I don't know. Obviously such a mapping would only be accurate at full throttle, since the pistons respond to air flow, not engine rpm; and even then any substantial change in volumetric efficiency will change the air flow at a given rpm.

I've seen some clever ideas suggested for measuring the piston position while running, but never got that far myself.
 
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