i bought my car used it is an 03 srt 4 and the guy has a man. boost controller i am running 15 lbs of boost i have stage one. does anyone know if the stock turbo on the srt 4 can be turned up and if so how much and where will it be good at so it doesnt hurt my engine

the factory fuel system can handle up to 18psi, s1 should not throw a overboost code, if you are going to turn up the boost get a wideband gauge so that you can check your a/f mix. Plus get a walbro 255 fuel pump better fuel pressure. I have mine set to spike 20 hold 17/16 to red line