Gauges bar/psi

[cheddarcheese]

I am about to buy some gauges for my G.

Oil Pressure gauge for my Stand alone charger oil kit
Air Fuel Ratio gauge
Volt meter gauge
Boost gauge 

What reading should i get on my oil press gauge? bar or psi as its for my charger supply not engine?

and on my boost gauge should i get bar or psi?

i will also be getting oil press and oil temp latter on for the engine and a water temp guage to complete my collection.

[hayesey]

bar and psi are just different scales for the same thing, 1 bar = 14.5 psi.  So it doesn't matter which you get.

You'll need a fuel pressure gauge for the charger oil system though as it doesn't run anywhere near as much pressure as the engine oil.