Has anyone experienced an overboost issue with their tuned Sidewinder? My brother-in-law has a Precision EFI 280hp tuned 2017 ZR9000. He is supposed have a max of 16-16.5psi but is consistently getting 18-18.5psi. That tune still uses the stock 2-bar MAP sensor so this is a problem. He ran lean enough last season to take out a piston and erode away some of the head surface. He has had the engine rebuilt and replaced the head casting and is trying to track down the problem. He replaced the turbo at the end of last season thinking that was causing his oil consumption problem (it wasn't... it was the bad piston). He has swapped the MAP sensor, barometric pressure sensor, and wastegate solenoids with known working units and verified that there are no leaks in the lines. He has also verified that his boost gauge IS reading the correct pressure. Still... the boost is 1.5-2psi higher than it should be. Precision EFI isn't really any help. Any ideas?