Neo Head Help...

[Gillyr33gtst]

Pics of head and piston can anyone identify this engine has r33 cast numbers but had neo parts

[Ben C34]

Does the head have the front drain?

Edit...

Noticed it doesn't. Weird.

Edited March 8, 2015 by Ben C34

[Gillyr33gtst]

No oil drain it's super high comp 10:0 as well very hot running even with a brass radiator

[Ben C34]

A new head on non neo bottoms end equals high Como. Good with e85 I would imagine.

[Gillyr33gtst]

Was a good engine blew head gasket on number 5 I'm not sure on e85 when it's put back together ill use nistune in a z32 ecu instead of piggyback better tune and will last longer

[iruvyouskyrine]

Head is neo. Pistons are neo.

What question are you asking exactly?

[Gillyr33gtst]

You just answered it I was asking if it was a neo or non neo being a early engine I was unsure it has r33 cast numbers on block

[iruvyouskyrine]

What are the castings on the block and head. And also what is the engine number?

And can you take a pic of the top of the head, specifically of the cams/lifters. Cheers.

[Gillyr33gtst]

Cast numbers and head pics

[Ben C34]

A photo of the vct area would be handy. Showing the oil gallery from the block to the vct.

[Gillyr33gtst]

[iruvyouskyrine]

Yep head is most certainly neo.

[Gillyr33gtst]

Cheers any idea on bottom end

[iruvyouskyrine]

Will have a look at mine when I get home for you.

[Gillyr33gtst]

Thanks mate

[iruvyouskyrine]

I also have 75T stamped on my neo block. And the number under nissan is 84216. I'd say it's safe to assume that yours is neo.

What parts do you suspect is R33?

[Gillyr33gtst]

To be honest I was a bit dodgy on the whole bottom end with the rear oil seal case fouling on r33 flywheel but you have put me strait was only really asking so I don't get wrong bearings and rings for rebuild and they are stronger than a r33 engine

[MJTru]

This is interesting. I have personally took r33 gtst heads well over 30 psi of boost and beat the living hell out of them. What I hated was the hydraulic lifters some would fail on me. I've always wanted to do a neo head on my r33 gtst and see what would happen. Keeping in mind the motor was built. Looking at the cylinder head combustion area how can you guys tell its a neo. It looks the same as a r33 gtst head to me. Is there somthing im missing. For me I only wanted a neo head for the solid lifters like a gtrs head. Hmmm. Interesting post mate.

[GTSBoy]

Neos have a 51.5 cc combustion chamber. Non-Neo is 63. They are pretty easy to tell apart when side by side. The Neo chamber is noticeably smaller.

[MJTru]

Neos have a 51.5 cc combustion chamber. Non-Neo is 63. They are pretty easy to tell apart when side by side. The Neo chamber is noticeably smaller.

Hmm intresting to small.to see with the eyes. Whats the gtrs??