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Sorry 25t, this is where I got the info from:

'The RB25 twin cam head's variable inlet cam timing can be retained on the RB30 block by teeing off the oil pressure galley on the head and feeding the standard RB25 piston mechanism. This pushes the camshaft through a full 10 degree advance. All oil and coolant galleries mate up perfectly, with the exception of this cam advance unit.'

the above was from http://www.autospeed.com/cms/article.html?&A=0004 .

After reading this, I did some more investigation and was told it was as simple as drilling a hole in the RB30 block to align with the oil galley for the NVCS by more than one source.

Any chance of some photos?

i am becoming very interested in doing this motor build up as a side project after reading both of these threads which are proving to be very informative.

just a suggestion... is there going to be a price guide to go buy to give some of us an idea of the costs associated with the build up.? <-- for the word document that joel seems to be making

I think they want around a grand for the head..

Thats what I was quoted anyhow.

The Bottom end can be had for almost nothing and well the bearings etc can be had from Nissan so i guess a call to nissan may help us out there.

Hi Joel

no ill install the oil pump and squirters of the 25t block,get the crank balanced, looking at the stroke and pistons the comp ration will be higher because of the storke?,ill have to look into this a bit deeper

Steve, no dramas man ,your info is still very usefull

nothing is ever as simple as it COULD be.Ill post some Pics later today. I really want to retain the vvt.

thanks Guys

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