Fuel pressure?

Jordo!

The K multiplier is a constant value that models injector size and pulsewidth -- it affects injector ontime throughout the tune. To the best of my knowledge, the value typically needs to be chaged if you change injectors.

Target AFR is whatever makes best power with no evidence of detonation, and varies from engine to engine. Something on the rich side, most likely, as the extra fueling (i.e., running a mixture higher than stoich) is used to cool in-cylinder temps. Probably something around 11 - 12, but could be a bit richer (or leaner) depending on load, octane, ignition advance, CR, boost pressure, etc, etc.

If your guys have good general knowledge with tuning FI'd cars, they should be able to figure it out, at least to dial in a basic tune. Eventually somebody who has more experience with uprev and with this engine should be tracked down for fine tuning if possible.

The guys with more experience using uprev in particular and on tuning this motor in particular can probably give you more specific info...

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