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Rb25de Vs Rb25det (r34 Neos)

Grunta

By Grunta,
in Engines & Forced Induction

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Grunta Enthusiast

Grunta

Posted
Posted

Hello to all that read this,

Im just wondering what are the differences between the RB25DE and the RB25DET,

And dont say one has a turbo or puts out more power,

I want to know the nitty gritty, cams, pistons, crank, rods, head etc

I know compression ratio is high in the NA, but how is this achieved?

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https://www.sau.com.au/forums/topic/214425-rb25de-vs-rb25det-r34-neos/
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SKiT_R31 Experienced

SKiT_R31

Posted
Posted
Hello to all that read this,

Im just wondering what are the differences between the RB25DE and the RB25DET,

And dont say one has a turbo or puts out more power,

I want to know the nitty gritty, cams, pistons, crank, rods, head etc

I know compression ratio is high in the NA, but how is this achieved?

turbo is 9:1 CR, N/A is ~ 10.2:1 CR, achieved by different pistons.

Cams are the same, i think just on the turbo the exhaust cam gear is shifted a couple degree's.

Thats the internal difference, external theres the Injectors (370cc vs 270cc), ECU (to power injectors + different map & limiter), obviously different exhaust manifold, intake piping, things like clutch is different, different gbox.... thats about it...

R34GTFOUR Mentor

R34GTFOUR

Posted
Posted (edited)
The springs on the NA's are softer than the turbo ones.

And one has a turbo and puts out more power :rofl:

Remebering that 34's have a different head than the 33's and 2's because of the VVL

i know the r33 rb25de have softer springs than the det, but i've heard the neo engines are the same for both turbo and na

also if the pistons are the only thing different internally, i wonder if the na shares the same gtr rods as the neo det?

anyone pulled a na neo apart yet?

Edited by R34GTFOUR
  • 7 months later...
iseekool Veteran

iseekool

Posted
Posted

All R34 GT4s do not have the tiptronic functionality. From memory the gearboxes are still physically the same (RWD and AWD), just no tiptronic for the GT4 and RB20DE NEO. Tiptronic is only for the RB25DE and RB25DET

Dicer Collaborator

Dicer

Posted
Posted
i know the r33 rb25de have softer springs than the det, but i've heard the neo engines are the same for both turbo and na

GT-V (which is N/A) has same suspension as GT-T, otherwise standard GT has the softer suspension (and also smaller rims, and probably other differences).

R34GTFOUR Mentor

R34GTFOUR

Posted
Posted
GT-V (which is N/A) has same suspension as GT-T, otherwise standard GT has the softer suspension (and also smaller rims, and probably other differences).

i was talking about valve springs, not suspension coil springs :)

SKY-LINER34 Collaborator

SKY-LINER34

Posted
Posted

Hi all,

I would like to confirm the different on the R34 GTT and R34 N/A i've check out my mate's car which is a TT on the dash it have HICAS, Slip, TCS display, when on my N/A 34 it dosen't do that mean i dont have these feature?

If anyone have the spec fact sheet for both these cars?

Cheers

:P

GTS4WD Grand Master

GTS4WD

Posted
Posted
How can i get a LSD installed.

Ive seen a nismo one on NENGUN for 1.8k .. how would i install it.

MRXTCZ

You gotta drop it out of the car.

To do that you need drop drift shaft, prop shaft.

Open up the housing.

And change the gears.

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