Afternoon fellas. Anybody have any experience and opinions about these oil bypass shims??

Quote:
THE TWIN CAM ENGINE FEATURES WITHIN THE CAM SUPPORT PLATE AN OIL PRESSURE BYPASS PASSAGE THAT IS CONTROLLED BY A SPRING LOADED PLUNGER. THE PURPOSE OF THIS PASSAGE IS TO ALLOW EXCESS OIL PRESURE TO BE DIVERTED BACK TO THE FEED SECTION OF THE OIL SYSTEM. THIS SHIM ASSURES PROPER SPRING PRE-LOAD, IMPROVING OIL PRESSURE AND VOLUME. THIS CAN BE USED WITH FACTORY OR AFTERMARKET OIL PUMPS AND CAM PLATES.

I'll be replacing my inner cam bearings soon, and am wondering if this would be a worthwhile addition as well. Thanks fellas.

 

Just clean and reuse. The real important part is that you use torrington bearings.

 

I just installed a Wood TW6-6 cam and put in the Zippers Shim in the cam plate. I added this since I also installed a Jagg 10 row oil cooler and was concerned about any possible drop in oil pressure being routed through the cooler. Tonight I installed the Jerzee Custom oil pressure gauge since I was also wondering what was going on oil pressure wise. On start-up I got 55 psi and let it idle for 5 minutes. It dropped to about 50 psi. I'm sure it will drop down a bit more once I can get it up to operating temps. Still a bit cold up here in Tahoe. Hope this helps.

 

You can buy the Zippers shim or you can actually make your own using an appropriate sized socket head bolt cut down. They also have the Baisley LMR-02 spring which is also an option. I used to run the stiffer Baisley spring on my 04 when I did a cam job on it.

 

Thanks fellas. I ordered the Baisley spring today. All I need to acquire now is the adjustable pushrods, the shim, and still thinking about a new set of cams.

 

If you're running the Baisley spring you don't need the shim.

 

X2 I did my build a couple months ago, I got the LMR-2 spring and the Baisley plunger that goes on it. He said that the stock one doesn't fit the bevel inside the cam plate real well. Don't know if that's true or not but the oil pressure cold goes to 55-58 psi and 15-18 hot. A lot more than it used to be!!!

 

Does the plunger come with the spring, or do I need to order that seperately??

 

When I used the spring on my 04, I used the stock plunger. I only got the spring. This is something that I have not heard of. The folks I know that were changing out the spring back in the day were only using the spring and not getting any new plunger.

 

Just got off the phone with Latus HD, and they had no knowledge of a Baisley plunger. Perhaps a misconception somewhere along the way??