rob0001

Got some strange fuel flow related noises at idle only.
Sounds like cavitation / gurgling and started after I installed an 5bar FPR.
Switching back to the 3.8FPR no noise.
Changed back to another 5bar FPR and the noise is back....

Hooked up a fuel pressure gauge and the readings are:
- engine off and fuel pump activated a steady 5 bar
- at idle around 4.7 bar
- at 3000 rpm in neutral around 5 bar
- during test drive under load/ full boost up to from 5 up to 6.3 bar

Are these readings normal and what could cause the flow noises with the 5bar FPR?

mods are k16/24, 100 cell Europipe