I got this idea from a thread on an import board. The discussion was in regards to restricting oil to turbos.Might be old news to most of you, just sharing an idea.
In my mind the restrictor should be on the output of the head, after the filter. YMMV, some folks restrict the input. I do not know if it's critical either way, just that the majority of bypass systems restrict the out flow of the filter. This could still work even if the filter has a built in restrictor and you wanted to throttle it back more.
You'll have to figure out flow rate on your own, but I found it pretty easy to use a measuring cup, and count seconds to calculate quarts per minute/gallons an hour.
Thread the end of the fitting internally and add a hex head plug with red loctite on it to seal.
Just drill the size hole you want in the hex head.
1/32 drill bit is .0312
3/64 drill bit is .0468
1/16 drill bit is .0625
Restrictor in fitting.
Last edited by beanoil; 02/10/19 09:58 AM.