Drilled 240z cam

[Coyd]

I recently bought a drilled Newman cam, my engine has an oil spray bar. I’ve had problems of not getting enough oil on cam lobes. Question is by having spray bar and oil feed to cam will it not be building enough pressure for the spray bar to work correctly?

 

[jonbills]

How do you know you're not getting enough oil to the cam lobes? Thats not normally a problem.
Is the spray bar blocked or pointing the wrong way?

 

[mrzed]

I’d check the oil pickup for oily sludge in the sump
Mine had a problem it turned out the pickup was blocked
It made my cam start knocking
Cleaned it up and since been ok

 

[Coyd]

New built engine, spotless cleaned.
Ran engine without cam cover to see oil flow from spray bar as its worn one cam lobe. Do you guys have a drilled cam and
Spray bar?

 

[richiep]

Normally drilled cams are accompanied with a block off kit to eliminate the spray bar (or one can use non-oiling cam towers, e.g. N42, P90, etc.). Maybe running a bar with a self-oiling cam results in loss of oiling efficiency - oil going to the bar and cam rather than one or the other.

 

[ben240z]

I run a spray bar and drilled cam in the race engine

 

[jonbills]

I run a spray bar and drilled cam in the race engine

Have you opened up the oil jet at all Ben?

 

[jonbills]

@Coyd is it the new Newman cam that has damage? Did the engine have a std cam before which ran ok?
I ask because over the years I've heard bad things about cams ground on new blanks not being hard enough. (Not Newman specifically though).

 

[Coyd]

Yes Jon unfortunately but I think I might of mistakenly set the rockers initially on hot lash instead of cold. I’ve sent cam back for re-grind
It picked up on inlet third cylinder.
When I put it back together I’m going to spin her over with out rockers and rocker cover off, to make sure I’ve got enough oil
Pumping through.
A lot of people say the oil spray bar is the better root to go.
My previous cam was drilled

 

[ben240z]

Have you opened up the oil jet at all Ben?

No, there seems to be plenty of oil. I am running a dry sump system though, but the pressure is not set higher than normal.
Using Fuchs Titan Pro race 5w-40

 

[jonbills]

A lot of people say the oil spray bar is the better root to go.
My previous cam was drilled

I think both work fine normally, although the spray bar can be bent or leaky. I understand the oil flow to the head is marginal at idle for bigger cams, so I keep the revs above 1000.

 

[Coyd]

Ok thanks.