Convert P90 to cam oiler bar

[dapiper]

I'm thinking just use my cam towers and oiler bar from N42 head on P90 and ensure cam turns freely. Cam is not drilled. I'ts either that or have my profile ground on drilled stock P90 cam. What say? Anyone tried this?

[Yokohama]

Of course you can do both bar and internal lube, but you will need the turbo oil pump to have enough flow to both systems.

[Guest beandip]

Of course you can do both bar and internal lube, but you will need the turbo oil pump to have enough flow to both systems.

This is what I have on my P-79 head , both systems and the turbo pump. I am reading 25 psi at idle on a mechanical gauge.

[TimZ]

Isn't there a restrictor that needs to be removed somwhere? Can't remember if it's in the block or the head. I thought that if this restrictor wasn't removed, you wouldn't get enough pressure to the spraybar to adequately oil the cam.

[JMortensen]

In the How to Modify book they talk about drilling out the restricted orifice in the block. In the later version of the book they also talk about not needing to do that modification. I've done it on my engine. Last engine I built idled at 18 psi when hot, new one idles at 12, both had really close to identical bottom end bearing clearances. I could be full of it, but I always blamed the pressure difference on opening up the restriction in the block...

[dapiper]

Thanks guys for the encouragement. I will be using the N42 block, so it probably already has the restrictor. I will check the head for one too.

 

Yeah, I freaked the first time a machinist removed the cam bearing towers, but guess you have to when its warped in order to mill both sides. Makes installing springs much easier too.