I found a mismatch in the 180 Mhz clock configuration in Tensyduino
The only way to hit a 180 Mhz clock in HS mode exactly with a 16 Mhz crystal with Kinetis own online clock tools is the following parameters:
MCG.VDIV.scale, value: '45'
MCG.PRDIV.scale, value: '2'
SIM.OUTDIV2.scale, value...