Should be high 11s on boost. I personally would not want it to be any leaner than 11.9/12.0 on boost/WOT
Mid 10s is way too rich for most megs. Most of the generic shite maps are around 10.0 from experience, can cause loads of issues in the long run.
I don't know haven't checked, I'll check tomorrow. I have no reason to believe mine isn't fine I'm just curious and it's good to know the normal figures for your car!
It will go bang rapldly if in the 14s on boost. Should be 11-12.0 range no leaner on boost/Wot if mapped correctly. As Jamie said i would expect any decent mapper to send it out mid/high 11s on boost for reliability.
Optimum is 14.7, that's for normal running (cruising), that is 1 part fuel to 14.7 parts air, so the higher the number the more air so leaner
That’s the theoretical optimum (aka stoichiometric) but forced induction brings many other factors into play, especially engine cooling, exhaust gas temps and protecting the catalytic converter (emissions), hence these engines run much richer than stoich — 11-12, as others have said.
14 would be idle though? I would doubt running as rich as 12 when idle? My scanner can't even read my a/f so no idea what mine is but I no reason to doubt it. Just curious
1000-2000rpm - AFR14 2000-2500rpm - AFR13.4 2500-2900rpm - AFR 12 2900-6500rpm - AFR 11.5 Engine idles perfectly smooth, pulls from 0 mph to 167 mph (GPS) with zero hesitation
The only way to check it is to either swap your lamda sensor for a wideband sensor and in car gauge, or check it on a dyno with the operator's sensor in the tailpipe.
