Just for something to try if you will Grip, take off your intake right at the throttle body and see if you get even more boost. We all know the air will be hotter, i'm just curious how much the intake plays into your 23psi. Maybe the hotter air will drop boost, or maybe the lack of any restriction will bring it higher. If it's the same then you know your intake mods are dialed in! I was really surprised to see 22psi with just the 181, but I have a really big DIY intake/filter. I went lean, hit 14AFR, even with the bigger injectors, but I haven't upgraded my fuel pump yet or re-tuned. It was 20F outside at the time. Thanks for sharing your info with us Grip.