From Russia With Love )) Rb25det Neo Vs Rb26dett

[derden]

Greetings guys, I from Russia here am difficult enough to receive a trustworthy information on motors, therefore I wish to address to recognised gurus))

I have s13 silvia with 300hp rb20det on board, but for normal 3rd gear its not enough also reliability leaves much to be desired, so I have made the decision to swap another engene - and now before me it is necessary to take a choice rather fresh rb25det neo or to play russian roulette with r32 rb26dett. That you will advise if the purpose nearby 350ps on stock bottom with a minimum of alterations and investment))) but with the maximum reliability. transmission I will leave with rb20det, hope it handle 350 horses.

Ill be happy with any advisez about comparing this 2 motors to my requirementz

PLEASE give to my advice also concerning the turbine - that will meet my requirements better? 2535? GTRS? or ...

SPASIBO!

[Nee-san]

Greetings guys, I from Russia here am difficult enough to receive a trustworthy information on motors, therefore I wish to address to recognised gurus))

I have s13 silvia with 300hp rb20det on board, but for normal 3rd gear its not enough also reliability leaves much to be desired, so I have made the decision to swap another engene - and now before me it is necessary to take a choice rather fresh rb25det neo or to play russian roulette with r32 rb26dett. That you will advise if the purpose nearby 350ps on stock bottom with a minimum of alterations and investment))) but with the maximum reliability. transmission I will leave with rb20det, hope it handle 350 horses.

Ill be happy with any advisez about comparing this 2 motors to my requirementz

PLEASE give to my advice also concerning the turbine - that will meet my requirements better? 2535? GTRS? or ...

SPASIBO!

Hey mate !

I'm not sure how much difficulty you will have sourcing parts in your part of the world, perhaps talk to Guilt Toy on here as he may know things that could be helpful.

As for your dilemma, for what you require, definately go with the RB25DET Neo, as you say it is a much fresher engine whereas many of the R32 RB26DETT's you are likely to find will be well used with wear and tear, which is not ideal for a motor that will be stressed under drift conditions.

An RB26DETT will ofcourse produce more power in the long run but as you have stated your requirement is 350PS which either engine will make without any difficulty not to mention dare I say it, the issue with the oil pump drive issue with early run RB26's the balance in terms of performance and economy is stacked firmly towards the RB25.

Throw a GT-RS on it which are rated for I beleive 440PS (don't quote me) and the required ancilliary modifications such as ECU, injectors etc and enjoy your skids Buddy

[tridentt150v]

The rb25Neo engine will easily meet your goal pf 350ps. I'd match that up with a a HKS2835ProS or Garrett GT3076 and you will see 270 to 300rwkw all day long. The GTRS is probably a bit smaller and you will only see 250 to 270rwkw [i know some are making more, but as a general rule]. Try reading through the results page for the Rb25.

http://www.skylinesaustralia.com/forums/Rb...yno-t55845.html

I would consider swapping the rb20 gearbox for an rb25 unit while your at it - the rb25 is much stronger and if you are using it for drift then you will be using it hard.

What supporting mods do you have? ECU? FMIC? fuel pump? etc etc

[derden]

I have FMIC, Z32 maf, safc and i probably need also bigger injectors and nistune or powerFC..

[tridentt150v]

Yes, ECU [nistune, haltech, link, vipec, power FC etc etc] and bigger injectors [555 or 740's] and a better fuel pump than std, and other mods

[derden]

guys, what about comparison NEO to not NEO engenes - NEO is better to my aim? or its doesnt really matter?

I also would to say that in Russia all advise to swap rb26,

25det neo swap very few people and absolutely there is no experience on them.

And so u say that rb20det transmission doesnt handle 350hp? Even while 1 season?

[robots]

guys, what about comparison NEO to not NEO engenes - NEO is better to my aim? or its doesnt really matter?

I also would to say that in Russia all advise to swap rb26,

25det neo swap very few people and absolutely there is no experience on them.

And so u say that rb20det transmission doesnt handle 350hp? Even while 1 season?

Zdorova !

Hey, fellow countryman !)))

If you don't have access or money for bigger turbo or proper ecu or bigger injectors. Just go with rb26.

RB26 will be better bang for the buck. You could have factory 350hp with it and don't worry about bigger AFMs or new injectors.

Another option is to sell rb26 twin turbos and try to mate ur rb20det manifold with some 400hp turbo to it. So you could use factory EFI stuff.

Will give you better response and more punch than factory twins.

Your gearbox will handle it fine. Don't use a harsh clutch. Try to get a heavier pressure disk and use factory clutch disk. This will give you enough bite to handle the horses and still retain the driveability and slip enough not to break the box.

Even if RB26 fails you can swap the engine block to some other rb25 and use rb26 head with all the EFI stuff. And still be able to use the rb26 power.

Poor mans power forever !

[GTScotT]

+1 for RB26

This motor has the power you are looking for almost out of the box, not many modifications will be needed to acheive your goals.

As stated above a cheap single turbo manifold and a decent single turbo will bring the slug to drifting life.

The RB26 ecu is also easily remapable where as an R33 RB25 is not and a NEO requires a fairly delicate daughterboard. AFAIK R32 ecu's can have an eprom chip flashed and installed (no board needed). RB25s cannot and using an R32 ECU will disable your ability to use VCT (desirable on an RB25).

A friend of mine made 350WHP on an R32 RB26 using just front pipe - catback, boost up and reflashed ecu. Stock dump pipes were retained as would be stock intercooler piping, injectors and afms.

Pick of the bunch would be a 94 model R32 RB26 or R33, for the long nose crank (far more reliable). This option is not available on any RB25s.

GL

[tridentt150v]

^^^^ but he said a fresh rb25NEO or a questionable rb26dett and didn't want spend to much more after this ['minimum alterations and investment'] and considering his power goals I still think the NEO is the better option.

I agree that the 26 has more potential, but could also cost a swag more to get it.............

[James_03]

With the money it will cost to pick-up a 26, you can get a NEO then spend the rest on mods to get it @ 350.

Plus it's going to be WAY more reliable than a tired 32 rb26 hitting limiter all day.

[Guilt-Toy]

Welcome to the forums mate.

If you are in Australia then a RB26dett would be the way to go, however you are in Russia and it is not so easy to come across parts and tuners to complete this kind of conversion and the cost would be really expensive.

Why do you want to change your engine? Seeing that it is a S13 your RB20 will be all you need for a decent drift car if tuned correctly.

The RB20 can support over 350hp at wheels reliable if done correctly.

I suggest you keep the RB20 and do some modifications to this engine, instead of doing a engine swap Reason being is.

RB20 has re-mappable ECU, which is much cheaper then a aftermarket ecu replacement.

RB20 can take the RB26DETT 440cc injectors which will support your 350hp and they are cheap

The turbo you mention would be perfect for the job, if you cannot afford this turbo then a KKR 430 would be able to do the job also but may be little laggy compared to the Ball bearing GTRS

I am a tuner from Australia currently living and tuning cars in the Republic of Georgia, too bad you are in Russia it is a little bit far and hard to travel here we could have tuned the RB20 for you. We have a Dyno Dynamics 2WD dyno. I may be interested in a trip to Russia to do some tuning if you guys need a decent tuner, I am good with Apexi Power FC, Vi-Pec, Nistune and also have facilities to re-map standard ECU + many more platforms.

Good luck with it, i seriously think you are better off sticking with the engine you have as its still a good engine especially in lighter S13 cars.

Feel free to PM me or skype me on anthonye1978

Anthony

[derden]

Robots hi comrade )) what means ex-24dets?!))

I heard that go to big single on 26 is big money

Guilt Toy thanks man (if i gather some ppl with money we try to bring u to mother Russia))

Unfortunately rb20 is history - it in the bad condition and needs forged pistons, rods etc.. I think Is inexpedient to potter further with rb20det so I can not still be defined with a choice.

So what do we have:

I already have pump, z32 MAF, safc, boost controller, gauges oil,water,lambda,egr, FMIC,

so

rb26 - need low milage (best r34 redtop) - 5000$

1. castrate it to RWD - does pallet from my rb20det suits rb26?

2. i need second z32 maf (koz i dont want to buy 2 stock rb26 MAFs - i already have one z32 mAF and safc) 200$

3. clutch from my rb20det(?) or new ceramic - 400$

4. boost 14 psi

what we got then for 5600$? 320 - 330 hp?

or

rb25det neo 40-50k- 2000$

1. No need to costrate

2. z32 MAF, safc, boost controller, gauges, FMIC - bolt on

3. new turbo - 1000$

4. ECU + tune - 1000$

5. injectors - 400$

and here we got 4400$ - 350hp

currect me guyz

What way is easer?

[bozodos]

you talking US$ or AU$? lol.

NEO runs the same block, just has a single throttle body and does have variable cam timing vs none on the RB26. Kinda hard for any of us to say definitively what would suit you better - you're the first Russian I've seen on here; for some reason I thought all you had over there was Trabants!

[derden]

Yes Trabants and Skylines )

Guyz and what about 2JZ? or it doesn't make sence?It would cost about same money i think.

[Trozzle]

I'm sure you could get Jay Z to do a tour without much trouble