I am a newbie to tuning. I have done searches on here for guidance but being so new not connecting the dots. I have a 2003 Silverado SS with LQ9 with a FLT level 7 trans. I put long tube headers, High flow CATS, 160 degree thermostat, Comp cams 226/232 dur .584/.595 lift 114 LSA with new valve springs and push rods. I also put a Radix MP122 with the 90MM J tube and a LS2 TB that's been ported and last but not least a Walbro 255 in tank fuel pump. I bought a tune from a guy to get me started and it has been okay but not where it needs to be for sure. I also have a LC-1 wideband installed.
Last week I installed a 2 bar MAP. When I did a scan at idle I figured out that the current OS on my PCM is not setup to read the new MAP showing half the Kpa values that it should. I know I need to convert my OS to the 2 bar that is in HP tuners but also wondering the best way to rebuild my VE table for a starting point. Any guidance that some would could give me I would be very thankful. Also if I am missing something please let me know where to look. I want to learn if someone could just point me in the right direction. thanks!!