Shim for increased Oil Pressure

[in2trux]

(07-19-2016 )Rawze Wrote:  

(07-19-2016 )in2trux Wrote:  I talked with Gearhead allot about this when we did ours. He talked to a Cummins engineer and according to him the internals would take 120 psi.
There is a break point. Seals and gaskets will only take so much.

Do I really want to run that high? No but at 60 psi going down the road I'm comfortable. I never thought twice about oil pressure running a pre EGR CAT.

So why did they settle on 20 psi at idle?
I thank Top Ace for pushing this issue, personally I think 20 is way to low.

Oil is the life blood of any engine, any engineer, farmer or trucker will tell you that pressure and volume matter whether it's a 4 second run with a 10,000 hp top fueler,
a NASCAR engine running 500 miles flat out or a Quad 4X4 tractor pulling a 16 bottom plow. It all depends on application.

What that person may not have known was that several years ago, cummins LOWERED their oil pressures because bearings were getting washed out at 60+. that is what I know about it any ways, but who knows for sure. they didn't design it for the least pressure, there was in fact a reason for it.

You know far more than I ever will about hydraulic pressure but when I look at bearings down into the babibit and copper, I'll take my chances with the higher pressure.
I know it is possible to wash a bearing but we are yet to see any come out of an ISX.

Every picture of a bad bearing tells me not enough pressure to eliminate direct friction wear and loss of suspension, cam bearings in particular.
Wouldn't higher pressure help keep the cross drillings from getting soot packed? Short of proper tuning?

Some where in between is a happy medium that will yield exceptional wear but that is not in their financial interest.
We've already seen that with emission parts.