Vt fuel pressure.

[Fireblade.954]

Hi guys, basic question.
Is the fuel pressure with or without vacuum?
Eg, 350kpa with or without vacuum on an adjustable pressure reg.
cheers

[immortality]

3.5bar with no manifold vacuum.

Once the base pressure is set then connect the manifold vacuum source.

[The1]

it would be without vacuum 350kpa ( 3.5bar - 51psi)

So with vac it would be lower pressure and under boost higher pressure, being differential as it's harder to spray fluid under boost and easier under vac

[delcowizzid]

for setting adjustable regs start the car and set pressure with vac hose off engine idling

[Fireblade.954]

Cheers guys