Bandit 12 Oil Cooler Pressure.

What's the approx [1] pressure in a K1 Bandit 12 (SACS) oil cooler?
I've always assumed it's quite low 'cos there's no reason to pressurize
oil in the context and every reason not to.

However someone's just told me it the same as the engine oil presure
which simply cannot be right.

[1] I dont need a specific number.

 

Is it a shell bearing crank or roller bearing?

Roller bearing cranks are lower pressure, shell bearing high pressure

 

Agreed.

The cooler will most likely run at a similar pressure
to the rest of the oil system.

I don't know about this specific engine but in my experience coolers
are
usually installed on the high pressure side of the pump.

Why you may - and have - asked?

Well what alternatives are there?

Own circuit and pump?
Extra bits, more money, less reliability

Suction side of main oil pump?
Less pressure to drive oil through cooler (no more than 1 atmosphere)
so cooler has to have a larger aperture.
Possible increased priming issues if oil system
is drained.

On the other side, a cooler that is strong enough not to
bend with normal handling is pretty much strong enough to
deal with 50-100 psi oil pressure.

 

Well yes for obvious reasons it needs to upstream of the oil pump, but
a smaller apperture on the inlet or valve (if you wanted to be really
high tech) could protect the cooler from the full oil pressure. ...and
the advantages of doing so are immense.

Anyone give me the definative answer?

 

But restricting the flow would make the cooler less efficient.

It's in the middle of a pressurised system, so logic dictates that it'll be
under roughly the same pressure as the rest of the oil, given that
variations will exist within the system due to tight tolerances at one ond
of the system (like main and big end bearings) and restriction free pipes
that carry the oil around.


Of course, someone will know for sure, I'm sure.


--
Beav

VN 750
Zed 1000
OMF# 19

 

True. - but then if you make the 'out of cooler' apperture bigger than
the 'into cooler' apperture you can reduce pressure without restricting
flow at all.

I hope someone knows.

 

It's basically the same engine as my old gixxer.
The manual has a diagram of the oil flow - the oil cooler is at full pressure
between the oil pump and the filter. The specific number is 7kg/cm^2.