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PCA Member since 1988
Join Date: Feb 2018
Location: SW Washington State
Posts: 4,616
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Agree with Scott. Lambda is what the O2 sensor actually reads. The display converts that to AFR via a simple table with the assumption that Lamba 1.0=14.7 AFR. 10% ethanol contaminated gas actually has a stoichiometric AFR of about 14.1, not 14.7, but the "AFR display" will show 14.7 when lambda=1.0 and burning 10% ethanol crap.
According to Bosch, max power is around lambda=0.90, however, 0.85 gives up almost no power, and increases resistance to detonation, so .85 is safer for most purposes.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners.
Cars are for driving. If you want art, get something you can hang on the wall!
Last edited by PeteKz; 12-31-2024 at 07:37 PM..
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