Dynos & AFRs

SonicVQ · 04-14-2016, 06:10 PM

Quote:

Originally Posted by mults

Could be that Nissan is trying to squeeze every MPG out of these cars. When I had mine dynoed a few years ago (CBE, HFC and Cold Air Intake) mine was in the 12.25 - 13 range, even at wide open throttle with the stock tune.

That range is what I would expect for a stock tune. The stock target AFR does not change with bolt on mods.

I am trying to understand how some stock tunes show up between 10-11 AFR. The only thing I can think of is the wideband O2 used to sniff the exhaust is old or not accurate.

FordMuscle Mag did a comparision test and found HALF of the eight wideband sensors tested were out by 1.5-2 points!!!
http://www.diyautotune.com/downloads...20Shootout.pdf

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