[Richard L]

Mx5,

Thank for reminding me of this thread, I somehow missed it. I check the sponsors section everyday and may be you can post it to that section in the future if things get urgent.

We normally set the pressure switch between 6-7bar but only stated 5 bar for the following reasons:

1) Voltage drop along a long cable or bad chasis earth will affect the peak pressure if the pump is not connected to the battery directly.
2) The rated pressure is guaranteed up to the largest jet of 1mm.
3) We rather understate due to the reasons given above.

In your case you can increase the pressure to a maximum of 9.5bar. The pump will maintain these pressures up to a 0.6mm jet and 0.7mm at 8 bar (under the ideal conditions). If you don't have a pressure gauge, you can base on 1/4T clockwise will increase the pressure by 0.5bar or 1T=2bar.

With the 2d, you can be pretty generous with the jet size as it is progressive with your fuel injectors' Duty cycle.