Suberman

Hi guys,

Apparently the USDM 07-08 WRXs / STIs come with a dangerously lean tune on boost (for emission purpose?)

From a 08 USDM WRX


As can be seen above. The AFR is around 14.7 at full boost around 2800rpm and stays that lean until about 3800 rpm, then it richens a whole lot.



This is an 08 STI basically stock vs a stage 2 tune. Pay attention to the AFRs.

Do the Euro/UK spec WRXs / STIs have the same kind of tune? Anyone has had issues with your 07-08 WRX/STI?

Any dyno charts with AFR to share?

You can read about it here --> 2008 STi... Ringland? Turbo? - NASIOC