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wideband tuning, rear or frt cylinder??

(Admittedly I did word it in my previous post kinda ambiguiously as ->to lean a mix in the front, )

A over richness to the front (after richening the rear) would attest more to what your saying above. But in relavance you are gonna be stuck with "both" cyclinders changing if you change the TFI since it cannot differentiate between the cylinders like the other tuners can.

But like you say you might have more insight into the rears Lambda (if that's what your meter reads) but again you are gonna be blind what's happening to the front unless you switch the meter on both. Like I said earlier I kinda believe Doebeck choose the front cylinder for more than just a shorter distance to the bars for the meter. I kinda feel they are letting the ECM richen the rear on it's own and going by the front.

6 of one and "possibly" half a dozen of the other.
 
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