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Parts Swap - RB25DE NEO vs RB25DET NEO

corbic

By corbic,
in R Series (R30, R31, R32, R33, R34)

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corbic Apprentice

corbic

Posted
Posted

I've been trying to do some research and there is not a lot out there.  I've seen the following comments. 

 

RB25DE Neo (Non-Turbo) has a different head casting with smaller intake ports. The valve springs are "weaker" and the exhaust cam is different. 

Different injectors, 10.2:1 vs 9:1 compression (different Pistons) . I can visually see the intake manifold is completely different as well as the crossover and throttle body. I've seen a comment the DE block lacks piston oil squinters. 

 

Can anyone confirm the following? 

Block castings? (ie will a DET head swap to a DE block or something weird going on there) 

Crank? Rods? (I always hear the NEO DET has RB26 rods but have never seen a photo to prove it) 

IVAC unit? CAS? 

What is the Ring and Pinion for the AWD models? 

 

 

 

GTSBoy Grand Master

GTSBoy

Posted
Posted
4 hours ago, corbic said:

Block castings? (ie will a DET head swap to a DE block or something weird going on there)

Heads will swap. No squirters in the DE block of course.

Cranks are same. Neo DETs definitely have RB26 rods. I can't tell you if DEs have 26 rods or not, but I'd be surprised if they did. It has been so very many years since I saw some, but I think they were toothpicks, like a lot of Toyotas.

CAS is same. No reason for it to be different.

ICAV - I dunno. It hardly matters anyway. Just make whichever one work, or go E-throttle to piss all that dirty Nissan shit off.

4 hours ago, corbic said:

What is the Ring and Pinion for the AWD models?

Probably 4.11. But it could even be different between manual and auto. In the RWDs, the manual turbos are 4.11, the autos are 4.08, for some stupid reason.

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  • 2 months later...
hugh jaynous Contributor

hugh jaynous

Posted
Posted

I've read some where around here that the de neo run Det non neo rods etc. 

IACV is different between the two, de bigger and is 3 small pipes connecting, Det is two small ones and a large one.

 

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