So my 2010 wrx is currently running between 13.32 and 20.33 at max boost (17.75psi) is that too lean? Ive seen that between 11-14 is where most tuners like to keep it. Im on a stage 2 91 octane tune.
That’s way lean. You should be around 10.9 to 11.1.
The number you are reading on your AP is not accurate.
The OEM front O2 sensor is between the header and the turbo and cannot be used to monitor air fuel ratios under open loop fueling.
The answer to your question can be uncovered by either one of two methodologies:So do you think im safe because the tuner used one that had a wideband, just since i dont have one so i cant see my true afr
For some odd reason, you missed my point... so I'll make it again, this time in bold and much bigger..I downloaded another stage 2 map, now im running between 20 when in low rpm under braking and 11.14 under full boost (backed it down to 16.5)