Reply to "oil restrictor kit"

Folks have been installing cam bearing oil passage restrictors in Ford engines with the same scheme as the 351C (cam bearings fed by supply to main bearings) since I can remember. I am not aware of one person ever having a problem with their "tappets" after installing 0.060" restrictions in the oil passages supplying the cam bearings. As far as I can reason that is physically impossible.

So open up your restrictor kit. You'll find 4 small restrictors and one larger one. Toss the larger one away right now so you won't be tempted to install it, and so it won't confuse you. You're left with the 4 smaller restrictors. They have 0.060" orifices in them. I know this because I measured them back in the 1970s. The instructions say to install them in the cam bearing passages at journals 2 through 5. Groovy, do that. Back at the #5 journal that is the smaller, middle passage.

Pay close attention to Moroso's instructions to clean the passages as best as possible after tapping the passages.

In the aftermath of this installation you've possibly helped your engine's lubrication system a little. That's groovy too. It can use the help. BUT ... the cam bearing passage that needs restriction the most, the one that would help the most to restrict, is the one they left out; the passage to cam bearing number 1.

I'll continue in the next post.