Bypass Oil Filter

[Hammerhead]

(04-08-2017 )doarmihai Wrote:  you shim to get higher oil pressure?
is so how much ? how is yours?

Yes, shim for higher oil pressure.
The theory is, higher oil pressure will reduce or eliminate soot deposits forming in the smaller oil passages thus reducing the chances of oil starvation damage. The overhead cam(s) in the ISX is known to be a weakness, so increasing pressure should increase longevity.
This is all theory, but the theory has validity. So quite a few of us have taken the risk and have increased our operating pressure.
My CM871 was always on the low end of the spec, and I was always uncomfortable with it. I have 9 US dimes in the pump. I have a Spinner II bypass filter that has a parasitic draw of 2-3 psi, leaving me with a 44-48psi at operating range of 1550 RPM @ 230-205* (respectively) oil temperature.
The increased pressure also allows me to run the big 996 Spinner II bypass filter, which requires over 40psi (>45 is better) of pressure at operating temperature to work properly.
I am a heavy hauler that runs 150-180,000lbs GVW, so needless to say I have above an average torque load application and the risk of lower oil pressure damage IMHO is higher than the risk of spinning a bearing from excessive pressure in my application.

As listed above, I have several posts of what I did and my results in this thread. It starts with a very informative article by Rawze. It's a good one to read http://rawze.com/forums/showthread.php?tid=108