Looking to see if your AFR's went super rich after 6K rpm. I'm seeing low 10's, even a few 9's using an OBD logger and mid 10's on a Dynojet with a tailpipe sniffer. Car is an G37 IPL. The tuner thinks the tube design may be messing with the MAF but it has the plastic venturi inserts which is supposed to "normalize" the flow for the MAF sensors compared to the stock airbox configuration.
My butt dyno said the throttle response improved and I have more low and midrange. Up top it seemed a wash but summer also kicked in with 100 degree day temps. Wheel spin is more of an issue than before. I made the mistake of not running the car on the dyno in stock form due to time constraints.
Just looking to see if a Nismo intake did this on anyone else's car or if something is amiss on mine. Here's the run.
