How do I rescale for a 2 bar MAP?

[Supercharged111]

I just bought a Whipple for my truck so it's time to throw on the 411 that's been in the garage. It's got COS5 on it so I can tune for boost. My question is, because it's not installed and I don't know what COS5 looks like, what do I rescale so the PCM reads the new MAP sensor properly? Also, in case someone happens to know before I find it searching, what P/N MAP I'll need for my 5.7 Vortec.

[johnv]

You need to alter C6301 MAP sensor scaler, 190 will get you in the ball park.
there is a tutorial for setting up 2/3 bar custom operating systems.