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Will Gtr Valve Buckets Fit Rb25 Neo

BlackBox

By BlackBox,
in Engines & Forced Induction

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BlackBox Rising Star

BlackBox

Posted
Posted (edited)

Hi,

EDIT:

Found my answer that they wont fit,

so what is the easiest way to get away from shim ontop of the bucket?

i will be running tomei Poncams, supertech duel valve springs and standard Valves.

Edited by BlackBox
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https://www.sau.com.au/forums/topic/444350-will-gtr-valve-buckets-fit-rb25-neo/
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BlackBox Rising Star

BlackBox

Posted
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Posted

unfortunately there is no replies in that thread so it just adds to my confusion.

I have spent hours trying to find information but still dont know what to do.

is the rb Neo spitting shims even a real problem? i have only 'heard of people hearing about it'.. no first hand experiences .

GTSBoy Grand Master

GTSBoy

Posted
Posted

It's just a risk in general with shim over engines. Some engines have a serious reputation for it. But I must also admit to never hearing anyone complain that their Neo has actually done it.

And that thread I linked gives actual solid info on what buckets and shims could be used, so it's not useless.

MJTru Mentor

MJTru

Posted
Posted (edited)

Lol. I was thinking. Can he just use the neo head on a r33 rb25 skyline. Ive always wanted to do that cause it would be way easier than to convert a r33 rb25 head to solid lifters. IIRC. Only the intake would be different. And I think it as dual VTC. One of them would have to go.

Edited by MJTru
Ben C34 Grand Master

Ben C34

Posted
Posted

Lol. I was thinking. Can he just use the neo head on a r33 rb25 skyline. Ive always wanted to do that cause it would be way easier than to convert a r33 rb25 head to solid lifters. IIRC. Only the intake would be different. And I think it as dual VTC. One of them would have to go.

It's not dual vct. Still only on intake

There some slight wiring differences but no worries.

Will result in a big compression increase due to the smaller chamber of the neo head.

Would be really good on e85 and totally shit on petrol!

GTSBoy Grand Master

GTSBoy

Posted
Posted

These last few posts are not to the point of the thread - I think the OP already has the Neo and would like to make it more like RB26 or like a solid lifter converted 25. Putting a Neo head onto another RB25, whilst a good idea and subject to the questions and points in those last posts, does not address the potential problem of shim spitting.

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