I thought I had a pretty good VE and tune going being all stock, My last log was the first with headers on it, and it looks like my trims are -8 Avg.

Naturally I gotta redo the VE Tune having added the headers, but that is what I should expect to see with adding headers? I believe I read headers lean out the tune because it makes the engine breath easier, so it would make sense that the PCM would want to add fuel to it. This being said my VE numbers should increase my next round of tuning more air = more fuel?

The other thing is the Racetronics pump has added about 2-3 PSI more pressure, that being said I would expect the car to be richer with the higher Fuel Pressure. So in fact my trims would likely be further out than -8?

Just doing a sanity check.

I plan on updating the IFR table to the new pressures and and then VE again.

Am I on track or just all FUpped?