Manual states "base calibration" is 5", which is the orange. I've tried to decipher which is which, but these dang springs have color wore off of some of them. See pic.
I thought I saw a blue tinge to the springs that are installed. If it is blue, that's the leanest spring, so why in the heck is it so rich?
Is there something "more" to the spring than the inches of vacuum? Height maybe as well?
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