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AFR Bung Placement on 4-2-1 Exhaust 444-544

I have one on the combined exhaust (I have the single outlet manifold). I use it to tune the twin SU carbs but to be honest, I get more out of the spark plug colors. When just lean enough to turn the spark plugs light tan, the AFR seems to run around 11 at idle and 13 at cruise. I have the digital read out plus LED's around the edge like Ron's article references.
dean






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New AFR Bung Placement on 4-2-1 Exhaust [444-544]
posted by  someone claiming to be tommyt544  on Tue May 24 10:56 CST 2022 >


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