RB26 in a 240zx

[Victor Laury]

No RB's - Last straight 6 was the L28et in the S130

No rear drive SR20's

No turbo SR20's

No laurels, No Cedrics (I think the Ced would have sold well)

No Skylines or anything that looked like one.

No GTiR's (that pocket rocket would have Killed the Honda Performace craze!)

Our CA18DET is Not the same as your CA18DET

No FJ's motors at all

No Micras

No Patrols since 1970 until their return 3 years ago as Xterra's

Just Bluebird (sentra), Bluebird (Altima), Maxima, neuterd Silvia's (240sx), (Pulsar - now - 200SX That I have no idea what it sells for overseas, gutless G motor) Pathfinders, pickups and Z's. All the real, exciting, tuned cars didn't make it. Closest things were the Sentra SER (fwd SR20DE) and 1 year of a pulsar SER FWD SR20DE. For the Roadster conversions we got to import a RWD SR20DE (The DET's don't Really fit) or settle for the KA24DE

[Jae]

would installing a rb25 be harder than installing a rb26

[kyteler]

No, I don't think so, What made you think that?

What it comes down to is you're putting a different series block in, there's always going to be some things that have to be changed and with the different versions of the block there will be more or less things to do, those things don't necessarily make it any harder, maybe more expensive.

But if one's going ot be more expensive no doubt it would be the RB26, maybe if you're really interested you could send some emails to Cuong Nyugen, (apologies if that's spelt wrong, it was just off the top of my head).

However, your best bet would be the hybridz website as previously mentioned, I'm sur ethey have more detailed info relating to such things.

Good luck.

[PrOxLaMuS©]

RB26DETT engines need a RB25DET 5-speed transmission and a custom oil sump for the engine.

The RB25DET will fit easier, but will still need a custom oil sump.

From Hybridz.org

How to swap an rb engine into a z

First you need to figure out what engine and performance you want…

The rb-20 motor is a 2 liter turbo or N/A motor both are considerably stronger then the L motor

The rb-25 is basically the same as the 2.l but has more displacement and can be modded to handle more HP in its stock internal form. A friend of mine took a stock N/A rb25, threw a turbo on it and ran the hell out of it for a year and a half at very high boost levels before he put a hole in a piston!!!! Car dyno’d at 430 RWHP on a chassis dyno

The rb-26 DETT comes twin turbo only… it is a detuned Japan touring car motor. With simple upgrade like a chip , intake, and exhaust you can be well over 300hp. The bottom end is built to with stand 600hp before needing upgrade forged pistons and rods.

This motor is considerably different then the 2.0 and 2.5. The only thing that is swappable between the 2.5 and 2.6 is the block and that has to be bored and some other mods done to fit the head. If possible you want to stick with the 2.6 block especially if your going to build it up for a lot of power… the 2.6 block is a lot stronger

Ill start with the rb-26 swap as this is what I did.

I purchased the majority of the parts from one shop on Okinawa (HAAS) and got a pretty good deal on everything. Here’s what I got

Rb-26dett, trust FMIC, r-33 GTS-T 5 speed tranny, r-200 LSD, drive shaft that I needed, and a bunch of other stuff I ended up not using. 3500.00

Things I didn’t use…

stock computer, stock wire harness, stock oil pan

First thing I did was remove the GTR oil pan , installed the pickup / oil pan from the z-31. Then I installed the z-31 motor mounts. I installed the motor with tranny bolted up. We then took the stock mount from the L tranny cut it up and welding it back together. Then cut and shaped the chassis part of the mounts and bolted everything together. Once everything was in place where I wanted it we tacked it in, then removed everything and welded it all up. It wasn’t till later that we figured out the drive shaft would fit without cutting it ;> I was told this but had never seen it done so I wasn’t sure. From this point it was a matter of fabricating all the stuff to make the engine work.

Other parts I bought from different sources…

Exhaust (Kakimoto) I ordered this thru Matt at motorworx on Okinawa. http://www.motorworx.tv/

I bought the GTR down pipe from the kinser auto hobby shop USMC then had it modified by matt to fit the 260z install. basically cut it in half then welded a couple of bends in it to fit

Fuel pump I bought off of ebay … bosche 600hp injection pump.

The oil pan and sump I got out of a Japan spec Z-31 rb20det 300zx in a junk yard. the front of the oil pan had to be cut out and lowered to clear the bearing retainers in the 2.6. The block has a spot for a rear pickup but it is not drilled out so I had to use the front port on the 2.6. This meant I had to make a custom oil pickup that went from the front of the motor to the rear.

If you use the rb-25 block this is not necessary, in fact everything from the Z-31 is bolt in!!!!

I purchased the SDS EMS thru matt at motorworx…. I can not say enough about matt… he is awesome and very meticulous… if he wouldn’t do it on his own car he wont tell you or do it to your car

Labor

I did pretty much all the manual labor like installing the motor, tranny, diff, and a bunch of other stuff associated with a body restoration;>

Matt at Motorworx did all the welding on my car…to include the exhaust, down pipe, intercooler in and out mods, and piping

He modified my fuel tank pickup to a –8 for better fuel delivery.

He also did the SDS install, and setup. Which without changing anything the car ran a best 11.138 @ 121!!!!!!

Ok to summarize… with all the parts above everything bolts in

You’ll need to make tranny mounts, and all the associated welding for the exhaust and intercooler piping. From there it just like any other swap.

The motor sits a little fwd with the z-31 mounts so if your looking for optimal handling you’ll need to make custom mounts to set the motor down and back a bit. You’ll also need a custom drive shaft.

I didn’t think the GTR drive train would fit in the car but it will…. but this places the motor so far fwd the radiator has to be mounted on the other side of the core support!!!! But does give the car AWD ;>

The rb-20 is an ok swap but only provides minimal power upgrade from a turbo l-28

The rb-25 is a bit better and can handle more power with its stock internals.

The rb-26 is the ultimate in reliability and performance…. This motor can be built to 600+ HP and be driven to work everyday with a full exhaust. (no earplugs;>)

For anyone considering this mod if you’re in Japan or Australia or have a lot of money go for it…. Anywhere else id go with v-8 or Toyota 2jz TT which is a very similar in performance to the rb26

[Jae]

thanks for the information..

[baddriver]

There are a couple of guys on Hybrid Z who have done this, it looks good and the performance is incredible. Get ready for the downside, though. Someone asked what it cost one day and there wasn't a single reply who came in under $10,000 for the swap. It is a rediculously expensive conversion, and there are a number of problems for which there is just no good solution.

If anyone tells you they've done the swap for less, I'd ask to see their car. I'll bet you ten to one it isn't running yet!

[81na ZX]

Was this a question about swapping into Z's or into Silvias?????

240sx (silvia/180sx) - a RB will fit And really easy too, you just buy a clip, unbolt the frame crossmember with the engine mounts and bolt it into the 240sx chassis. It just bolts right in

But you have to ask yourself why? What do you gain over a SR20DET swap? SR20: cheaper, easy, nice power capability (4-500 on stock internals) good weight distro. RB: $$$, not as easy, very nose heavy, crazy HP potential.

RWD vs. FWD SR's? Different mount points. And the RWD SR has a clutch fan, FWD doesn't. A friend of mine has a USDM Pulsar w/ a sr20det and AWD swapped into it, the RWD sr will not fit that chassis like the FWD won't fit the S13/14/15/S30/130 chassi. Anyway, before they got rice-popular, RWD SR's were cheap and pleantyful and FWD sr20DET's are rare!

[PrOxLaMuS©]

no no no

FWD SR20DET's are not RaRe!!

I own a Nissan Sentra, and the very very common swaps are SR20DET's .. FWD.

You can easily find a SR20DET from Pulsar's, GTiR's, BlueBirds.. etc.

You can get an: (FWD)

GTiR SR20DET

Avenir SR20DET

BlueBird SR20DET

much like the (RWD):

BlackTop S13 SR20DET

RedTop S13 SR20DET

S14 SR20DET

S15 SR20DET

------------------------------------------------

Pulsar: 170/119 hp

(Neo VVL)

S15 Silvia:

250/202 hp

SR20VE: 187/144 hp

(Neo VVL)

But if you want an SR20DET... you are looking at a cheap alternative...

The SR20VET slams out 278 bHP!!

and it's RWD!!!

The SR20VE engines and SR16VE engines are very hard to find...

but the SR20VET engines... have as much power as the RB26DETT and with .6 liters less displacement.

[Cuong Nguyen]

Originally posted by PrOxLaMuS©

You can get an: (FWD)

GTiR SR20DET

The SR20VE engines and SR16VE engines are very hard to find...

but the SR20VET engines... have as much power as the RB26DETT and with .6 liters less displacement.

Nissan Pulsar GTi-R (RNN14) are 4WD not FWD.

They have individual throttle bodies, unlike any other SR20(DET) engines

An SR20 engine having as much power as an RB26DETT (from Nissan GTR or Nissan Stagea 260RS) well.....

[Cuong Nguyen]

Nissan Stagea 260RS engine bay:

[Cuong Nguyen]

Nissan Stagea 260RS:

[Cuong Nguyen]

How many wagons have a 10,000rpm tacho from the factory!