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Procams In Rb25/30

mxkal

By mxkal,
in Engines & Forced Induction

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mxkal Enthusiast

mxkal

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Hi guys i been searching for a while now and couldnt get a straight answer.

Im currently building an rb30det with a rb25det vvt head with PROcams, I will be using tomei cam gears with the VVT removed. Do i still need an external oil supply to the front of the head for the cam journal or is it only used for vvt purposes?

Any help would be appreciated.

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Dale FZ1 Veteran

Dale FZ1

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Front feed in the head is for VVT. If retaining VVT there are mods you can make in the gallery, otherwise run an external feed as per the RB30DET guide.

If deleting VVT there is more than adequate oil supply to the front cam journals. You can also remove the solenoid and install a bung to simplify things.

Be sure to check the lift specs in Pro Cams - beyond 9mm in a RB25 head will probably require machining to give adequate clearance and avoid coil bind on the valve springs. If unsure you should consult with a head specialist and get things measured on the bench.

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mxkal Enthusiast

mxkal

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So really all id have to do is plug up the vvt solenoid hole and weld up the hole in the bottom of the head that used to supply the vvt, and probably put an oil drain in the back of the head down to the sump.

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Dale FZ1 Veteran

Dale FZ1

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Unless for extreme use, external drain is over-rated and misunderstood IMO.

Better value and results if the time and effort is spent drilling out the internal drainbacks in the head and block.

Otherwise, yep, use a bung where the solenoid used to reside (make sure it is the correct type to seal), and have the feed hole welded or grub screwed as per the guide.

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mxkal Enthusiast

mxkal

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fair enough. atleast its clear now. I have the head next to me now all apart and i can see that the vvt cam journal has 2 holes in it. One of them must me a constant oil supply from somewhere and the other is a supply from the vvt solenoid yea? The heads going on an rb34 stroker bottom end and there isnt must money spared on this setup so i wanna do it right without any troubles.

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