[$howtime456]

yes everyone is right. In order to reach anything above 21psi+ you will need a HPFP. Stock cant keep up. Especially if your running e85. The more e85 you run the more strain you put on the fuel system. Especially the primary LPFP. Even when you have the LPFP and HPFP you then will put a strain on the fuel injectors. When tuning you want to keep the LPFP happy. The stft must stay between +5 and -5. You also dont want to max out your fuel injectors or the rail pressure will crash. Everything has to flow in accordance.