(04-05-2016 )Erics diesel Wrote:  I remember from the old site that you can use dimes or pennies to shim the oil pump but how many do you need to to use? My engine is getting a new head and rod and main bearings and want to up the oil preasure wile everything is apart so how many and wich one do I need to use?

(09-15-2015 )Gadget Wrote:  I wanted to follow up on the oil pressure
After I got back to my shop I decided to pull the oil pan and fix the mistake we made with the oil pressure mod.
When I got the pan removed actually dropped down in the front I completely removed the pressure regulator valve from the oil pump, you have to remove one of the mounting bolts and the cotter pin to get the valve out.

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As you can see in the picture the spring goes into the cup in the end of the valve I added 6 pennies inside the cup to add tension to the spring. I think you could use more I wasn't interested in huge increase just enough to keep oil pressure at about 40 psi while going down the road at 13-1400 rpms
After adding the pennies (you could also use dimes) I have driven this week and at 1400 rpm and oil temp around 220 I am keeping 40 psi. I am thinking if I did it again I would have used 8 or 9 pennies. The spring is definitely harder to compress and get the cotter pin back in. I got the end cap started then used a torx screwdriver to push the cap in to install the cotter pin.
I don't see a great increase in idle oil pressure but a very solid 20 psi at idle about 650 rpm
I also changed the oil filter bypass with the new cartridge style valve.