Yesterday, I have started the engine...
Before, I hooked up the engine oiler to raise the pressure inside the engine and fill the hoses going to the cooler.
I have inserted a pressure gauge between the oiler and the engine...
I used a modified DS pressure sensor unit to attach the hose to the engine.
When the engine started, I had 8 bars of pressure (Using a straight 30 oil)
At normal operating temperature, I've read 1.5 bars @ 1000 rpm, which is right to specs.
For the first start, I left the engine running for 20mn up to normal operating temperature. Today, I will tun up the ignition and synchronise the carbs...