These are the numbers that I got from Robrstopr (Craig). He runs at 10K. Can't remember if he is the Stage 1 or the upgradeable. Green 3.5, Yellow 1.5, Red 4.5, Green/Blue 4.5, Yellow/Blue 3.5, Red/Blue 2.0. Trey (High Altitude Boost) sent these numbers Green 2, Yellow 1, Red 3, Green/Blue 4, Yellow/Blue 1.5, Red/Blue 3. I ended up at these numbers so far at about 8K elevation Green 2, Yellow 1.5, Red 3.5, Green/Blue 4, Yellow/Blue 2, Red/Blue 3.5. I have the Stage 1 upgradeable with outside/exterior cold air intake, so my numbers might be a little different than a Stage 1