4 replies to this topic

[Gsybeach]

I need some advice with oil pressure on the hayabusa.

The manual says you should get between 28-71psi at 3000rpm with oil at 60deg.

At 3000rpm I get nearly 100psi when oil is cold.
25-30psi at 60deg.
but when the oil gets hotter i.e. 80deg the pressure is down to about 15psi at 3000rpm.

Is this too low??

[z cars chris]

wheres your oil cooler sounds like you may be getting it too hot and thinning due to overheating
chris

[Gsybeach]

The oil cooler is enclosed near the engine but it has air fed to it from a naca window duct. Admittedly I was driving at the local speed limt (35mph) at the time so not much airflow was going through it.

The oil temp gauge only read 80degC, which I don't think is that high? It would be interesting to know what pressure others are getting at 3000rpm/oil temp 60-80degC?

[Gsybeach]

I have just checked the oil I am using and it is 10W-30. Could this be the reason? Maybe a straight change to 10W-40 would increase the pressure.

What viscosity oils are you using??

[De Blerende Beetle]

10W30 is a very thin oil when hot.