Neo RB25/S14. Worth the BS?

[OneSicSilvia]

Whats up fellas, I'm looking into picking up a new project. I've had too many S13s so I'm gonna try an S14 to change it up. I know, big difference rite... lol :picardfp: . Anyways I've been shopping around lookin at some RBs. I was reading up on the NEO 25 and that seems like a real good bang for the buck. However, the regular 25 is always a good bang for the buck lol. Power goals are set around 400whp wich I know both motors will take. The NEO of course will handle this much nicer. My biggest concearn with the NEO is all the little bs to deal with. Such as the after market fuel rail setup if you want to run the Greddy plenum, the wiring bs for the traction controll, the fack that there is NO fsm in english and I dont know any japanese lol. I know the 25 and NEO or fairly similar but still, theres details that I'd like to be able to read about. With all that being said. I'm probbably going to end up building the motor next winter anyways. So my thaughts (correct me if I'm wrong) would be to simply go with the standard 25 and terrorise is till next winter. is the VVT really worth the extra pain since I'll rebuild it anyways. Help me sway my decission damn you! :bigok:

Thanks fellas!

[ch1873857]

there are many more pros than just the VVT.. Im doing a neo build and your concerns can be solved with easy solutions. greddy intake manifold> im using 550cc rx7(ithink?) injectors with a top feed fuel rail. that one wasnt hard. traction control> if you are running a greddy plenum use a q45 throttle. gets rid of your traction control. as for wiring, pinouts ARE available. tear the harness apart, isolate what you dont need, rip it out, and wire it like you would wire up any other motor according to your pinouts. tuning options are limited due to the neo ECU having a different connector than the other rbs. im using emanage ultimate with mine. so we'll see how that goes.

i bought the neo because its newer. most of the problems with the older series were fixed. solid lifters are a plus, the oiling is different in the head. no need for the head drain.

[ch1873857]

R34 Gtt Neo Rb25det Wiring Info For Conversions - Skylines Australia (http://www.skylinesaustralia.com/forums/topic/284185-r34-gtt-neo-rb25det-wiring-info-for-conversions/)

may also help

[OneSicSilvia]

I feel what your sayin. Appreciate the oiling info because I had forgotten about that detail lol. So running the Greddy manifold as I understand, most NEO users are using the Q45 TB as you had stated. Whats the prefered setup fro the fuel rail/ injectors. I heard a few people talk about modding the plenum to make the stocker work or some shit. I'd rather not start destroying new items just to jerry rig something lol. My guess is a Sard rail or something that elevates itself off the plenum a good bit?.

[ch1873857]

no dont mod the plenum. thats crazy. i think mine is using a gtr rail. with some spacers welded on. small mods. i bout it from my buddy like that. when i get back to the states i will take some pics and get more info if you want. honestly i think you should do it. if you look, the parts are out there. i even bought procams from frsport for less than 700 bucks.. THEY SAY that the neos have a different sound to them as well. i cannot confirm or deny this but few people run the neo. they were really expensive for a long time. i managed to get a fresh motorset with everything except tranny and splitfire coilpacks for 1100

[OneSicSilvia]

damn lol. The one I'm looking at is a complete for about $2500 shipped. Wich imo still doesnt seem too bad. I'm pretty crafty as far as manipulating things to work safely so I'll see what I can manage. But yeah pics and stuff are always nice. Helps me geta rough idea of what I'm going for. Thanks again

[ch1873857]

im about to redeploy. im starting the build shortly after i get home and sped some time with the wife. ill take plenty of pics. JEI in sterling va is where i always go. between me and my buddies we have gotten upwards of 15 swaps and everyone of them are very strong motors. my last rb25 i used an rb20 turbo. spooled at like 2500 seemed like. and GOD it was fast for stock. my buddy with a standard 25 turbo couldnt keep up at all

hes in sterling va and the last i checked hes running 1700 for full rb25 s1 and s2 swap. was like 1900 for the neo with the trans. cant remember. 1jz is hot right now so he had rbs out the ass. wanted to get rid of them.

[EnemyS15]

Shameless plug for my for sale thread.. If you decide to do a rb25det, I have one already disassembled and ready to go for 1800 or best offer.. just needs a turbo. (you mentioned building it one anyways, i just got the tear down done for you lol)

But to give some input into the thread, both motors are strong motors that can handle 400hp without problems. As mentioned earlier, the oil issues were tackled in later models/ Neo. It's all about personal preference. Any series motor can be a strong, durable, and reliable motor as long as it's done RIGHT the first time around. You made a right decision going Rb. It is my choice of platform and I've never been disappointed with them! A bit more $$$ out of pocket since Rb parts are a bit high, but well worth the hassle and work. Good luck man. If you consider my thread, hit me up in pm's.

[rb20240sx]

I'm using the stock fuel rail with the greddy plenum just had to make spacers. And ch1873857 mentioned some great things about the motor not to mention the fact that its newer, and nistune makes a board for it for cheapish tuning. $2500 is a decent price as well I got mine 2300 shipped. Where are you getting it from I saw zerolift had one the last time I looked?
I also have english fsm pm you're email and I can send it to you. If you choose neo

[godzilla_753]

Ive also got a neo, as far as I can tell its awesome so far. Was an absolute bitch to wire up. I also jerry rigged a 26 intake mani with ITBS onto it and Ive got a gt076r .64 waiting to go on, should be an absolute tire shredder with this combo. I say go for it, wiring information is out there, just gotta find it. Btw Ive been in contact with the OP in that skylines australia thread and weve both agreed that it isnt complete and I would use it as a very basic guideline. Best thing to do is get the wiring schematic and use it to wire it up.

[godzilla_753]

i bought the neo because its newer. most of the problems with the older series were fixed. solid lifters are a plus, the oiling is different in the head. no need for the head drain.


Was wondering, where did you find out that the head drain issue was fixed? What exactly is diff about the NEO head that the head drain isnt needed?

[ch1873857]

im sorry i should have partly. its been almost a year since i tore apart and compared my neo head to a series 2 and a 20. there were differences. ive been deployed so i couldnt even begin to tell you. i will research it for you though because i dont like making claims like that without back it up. a quick search pulled up this great article on the head pooling issues and how to fix them.

whoops wrong link will post later

it states that the neo is a hit or miss with the issue. i can tell you that the front head drain that older RB have is blocked off on the neo. meaning that there has to be something they engineered around it. i just dont remember what it is..

http://i182.photobucket.com/albums/x283/mintr33/Skyline/CIMG1450.jpg

that one right there.

i feel stupid for drawing blanks now. i just now after the conclusion we came to about the whole issue when i was building my neo i decided that the head drain kit wouldnt be necessary.

[OneSicSilvia]

I'm pretty sure that I'm def gonna get it now. I've been pricing up some stuff also. Anyone have recomnedations for Motor/ trans adapters. I know McKinny has them, but shit...$500 bones seems a little crazy lol. I'll buy em if their the best there is, but its still steep. as far as wiring goes. I know you can get a harness made up from Wiring Specialties for a few hundred bucks. They just take the NEO harness and KA harness and use whats needed so it plugs rite in for you(wich is thr route I'm considdering). I dont mind doing wiring its just usually a nightmare lol.

[OneSicSilvia]

I'm ordering the Swap from JDMEngineZone I've ordered a few motors/ trans/ front clips from them and never been dissapointed.

[rb20240sx]

I'm pretty sure that I'm def gonna get it now. I've been pricing up some stuff also. Anyone have recomnedations for Motor/ trans adapters. I know McKinny has them, but shit...$500 bones seems a little crazy lol. I'll buy em if their the best there is, but its still steep. as far as wiring goes. I know you can get a harness made up from Wiring Specialties for a few hundred bucks. They just take the NEO harness and KA harness and use whats needed so it plugs rite in for you(wich is thr route I'm considdering). I dont mind doing wiring its just usually a nightmare lol.
What would you need a motor/trans adapter for? Just run the pull type it comes with unless its awd of course. I have a push type clutch with push nismo slave on my pull type and it works great just had to make some spacers for the slave. Every one forgot to mention they come with gt-r con rods to :). But if you're talking about a mount kit idk either meet some one who can fab something up or go with mikinny or something. And sending the fsm now.

[ch1873857]

i have used TopHat mounts in the past and I love the fitment. clears stock hood. perfectly centers the oil pan directly in between the front crossmember and the sway bar and shifter placement couldnt be better. AND is comes with hard rubber motor mounts. so there no vibration and the motor doesnt move.

RB20DET, RB25DET, RB26 ,motor mounts, 240SX ,Nissan | eBay (http://www.ebay.com/itm/RB20DET-RB25DET-RB26-motor-mounts-240SX-Nissan-/110786722603?pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr&hash=item19cb673b2b#ht_500wt_1287)

do not buy the knock offs on ebay for 200. buy top hats or zerolift (which are coming out with new ones in a couple weeks but have no idea how much they are.

DO NOT BUY THESE
240SX SWAP ENGINE MOTOR MOUNTS BRACKETS RB25DET RB20DET | eBay (http://www.ebay.com/itm/240SX-SWAP-ENGINE-MOTOR-MOUNTS-BRACKETS-RB25DET-RB20DET-/260545026636?pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr&hash=item3ca9b19a4c)

[Walperstyle]

If you are not buying a car with the RB25 already installed, I'd suggest going LS. You will save money in the long run.

It depends on if you are wanting to build a fun car, or try to impress a forum full of fanboys. Your car, your call.

[ch1873857]

really....? because the LS isnt the bandwagon motor right now.... jesus christ..

this couldve turned out to be a good useful informational thread for anyone looking into the Neo. now its just gonna turn into another lame LS debate thread.

[OneSicSilvia]

I have a 02 mustang gt with alot of work done to it. I dont need another V8 pile lol. Neo 25 in an S14 will be more than enough fun. and for the reccord. LS is def the where its at motor rite now. Formula D ring any bells?. It's NEO or bust at this point.

[OneSicSilvia]

I'll end up re making a new thread once i start the build anyways. This seems to be a farely scarce info swap so I'd like to do my best to educate those looking to do it once i start:hsdance:

[dftsilvia]

i have had a neo for 3yrs and i love it. stock for stock you cant beat it. i walk on regular 25's all day and im still on stock boost(7psi). awesome powerband for drifting, very little to no lag from the turbo. and the continuous vct is awesome. super reliable too and get 2xmpg's. i would not trade it for anything. oh and it sounds fucking awesome!
although i would like to do the 26 itb's, and big turbo like ken noumora's blitz drift car.

[ch1873857]

i have had a neo for 3yrs and i love it. stock for stock you cant beat it. i walk on regular 25's all day and im still on stock boost(7psi). awesome powerband for drifting, very little to no lag from the turbo. and the continuous vct is awesome. super reliable too and get 2xmpg's. i would not trade it for anything. oh and it sounds fucking awesome!
although i would like to do the 26 itb's, and big turbo like ken noumora's blitz drift car.

thats awesome! im interested how mine will turn out. im using a garrett single ball bearing t3, rather small because i like response over a big top end. when i need more power im gonna go with a 3071r. im in the process of trying to engineer a way to tuck the radiator so i can use puller fans as well as have a mid or high mount to shorten my intercooler piping. dont think its gonna work out. i will probably end up doing a variation of a Vmount design with my vented hood. i cant waitttttt

[dftsilvia]

thats wayyy to much work. just cut the rad support out and fab a new one. word of advise keep the clutch fan, best mod i ever did was put it on my engine

[ch1873857]

there is no where near enough room for a freakin clutch fan dude. i honestly think if i tuck the radiator and make a sheet metal shroud it would work very well.

[dftsilvia]

there is no where near enough room for a freakin clutch fan dude. i honestly think if i tuck the radiator and make a sheet metal shroud it would work very well.


how u guna tell me that when i run a clutch fan on mine lol. cut the rad support out, weld bar/tube in, move rad forward, and install clutch fan.

http://i59.photobucket.com/albums/g289/dftsilvia/Picture017-1.jpg

http://i59.photobucket.com/albums/g289/dftsilvia/Picture018.jpg

http://i59.photobucket.com/albums/g289/dftsilvia/0703111520.jpg

[ch1873857]

ahhh i thought you were talking about running the clutch fan without cutting the rad support . i like that though! thanks for posting that. more ideas. might add a shroud to that design. thats awesome thanks

[rb20240sx]

It's possiable to do with out cutting the rad support. This guy did it's just a regular rb25 but he did it, also has a small looking radiator though and a/c. Forgot what his name is but he has a build on zilvia and made his own mounts.
http://i442.photobucket.com/albums/qq144/S13RB20240SX/IMG_20111112_173013.jpg
Also OnesicSilvia I sent you everything I had on the r34. There is some cool stuff in the like the brochure they gave at the dealership for it and stuff. If you can share it on here for every one.

[OneSicSilvia]

thats cool. I prefer to run duel 12 electric fans usually. is there a reson you say to use the clutch fan vs a tight shrouded duel set up?