Hello everyone I'm new to the treads and new to Lexus, I have a 2002 IS300 5 speed with LSD. I got it for a steal and it had a few issues. It came with an Apexi neo afc, Intake and i think catback exhaust. I haven't checked if its axle back or catback. Anyway it was running like garbage so i pulled the AFC off and found that it wasn't causing my issue and that my MAF was bad. Once i replaced the MAF the car started running perfect, it starts has no hesitation like before and it doesn't puff smoke.

Now the question: I have worked on all sorts of cars for many years and have come across many different issues. As of lately ive been thinking of boosting it, as i came from a WRX before and miss the turbo lag. I was looking at a budget 5-7 psi maybe lower eBay kit for ******ts and giggles. (I'm building a Honda and BMW as well so I'm keeping this budget) I read on some other forums that you can boost the stock 2jz-ge motor to max 7psi without tuning the ECU. Understandably the ECU will calibrate to an extent to compensate for extra air, however does anyone know the safe side and the extreme side to that? is there anyone out there running or has run stock ECU with light boost and has had success and not blown there motor up?

 

Found this but i want more real life experiences with a untuned ECU