hey everyone i just put on a tbe was wondering if it was safe to now turn boost up to 20psi or 21 psi? i got a mail in flash before when i was stock so i didnt know if turning up the boost wud cause knock becuase of the AFR, any help would be appreciated, thank you

 

I would invest in a wideband and a openport 1.3 cable so you can log you cars vitals. No one can answer these types of questions honestly without data on the cars performance.