Information About Rb25det Neo

[leech_]

Hey all I just have a couple of Q's I need answered...

Someone I know is looking to buy a RB25DET Neo from an import place which includes engine, turbo, loom etc for $4900 it supposedly has 40,000km's on it but I have told him he had better do a leak down/compression test on it before handing over any money... does this sound like an ok price for the package or should he be able to get a half cut for this much???

also will a standard R33 exhaust system from a GTS-T bolt up to the NEO turbo or are they different studs or something ??? (n00b question I know)

Cheers Leigh

[race_snooze]

you should be able to get a half cut for that price, f**k your half way to getting a r32 for that price.

[Amaru]

Sounds like an ok price, definately do the tests on it though (it may be hard to get it to operating temperature though).

As for the exhaust, I believe the Neo has a larger exhaust housing on it so I dont think the exhaust will fit.

[leech_]

thanks for the replies i might see if i can get a better price out of the guy but being a NEO i figured it would be worth at least 4,500 as you can get a standard RB25det for about $3,500

[R3sp3ct]

While your on the topic...what is the difference between the NEO compared to the RB25DET?? I've actually been trying to find this out for the past few days.

EDIT: typo

Edited November 3, 2006 by R3sp3ct

[leech_]

my understanding is the neo has some sort of variable timing on the exhaust or something like that ??? also a slightly larger exhaust housing on the turbo as such a smidgen more power.

[Amaru]

I believe it also has solid lifters as opposed to hydraulic, most that have been pulled apart seem to have GTR conrods in them... theres quite a few changes.

[Bluprint]

The differences that I've heard of are:

- The crank angle sensor is different to an R33 one. An R33 one has a metal cover. The Neo one has a matt black plastic cover. If you need to see what it looks like try finding a picture of either a Neo or an R34 RB26DETT, they both have the same CAS cover.

- The plenum is a tad smaller than an R33 one and has a slightly squarer shape (for lack of a better description)- Apparently for better bottom end power

- The crossover pipe has a secondary throttle body which is about 2-3 inches before the main throttle body on the plenum, for the traction control.

- Neos have smaller top feed injectors, as opposed to R33 side feed injectors. 340cc vs 370cc or something.

- The R33 coil pack covers have that "NISSAN 2500 TWIN CAM 24 VALVE" badge on them on top of cylinder #2 roughly. The R34 ones have nothing on the coil cover at all due to the plastic engine cover and the intake gear almost completely obscuring the coil pack and cam covers.

- The vaccum hosing and coolant bleed points are in rather different spots on the Neo intake. (At the back of the inlet manifold)

- There is an igniter in each ignition coil as opposed to the other RB motors which has a single igniter at the back of the motor for all the coil packs

- The turbo has a nylon composite compressor wheel and what's supposed to be the same as a VG30 exhaust housing

- Solid lifters a la RB26 (mine certainly has a different sounding top end noise)

- RB26 conrods (either the same or similar)

- They don't have variable cam timing on the exhaust but the variation on the intake is meant to be different to the R33 one. The R33 one is supposed to be some kind of on/off arrangement and the R34 one is some kind of intermittent/available on demand kind of thing

- The ECU has a very different pinout

Anyways that's what comes to mind, I'm no expert so a lot of that might be incorrect

Oh, and the exhaust housing.... mine has an R33 dump pipe on it The original dump pipe was on the motor when we got it and it looked exactly the same as an R33 one.

[leech_]

cheers mark thats the sort of info i was after partiucally about the exhaust/dump pipe