RB20DET vs RB25DET vs RB26DETT FAQ

[Orlandos13]

Hey, I'm not that familiar with rbs so can anyone please briefly explain to me which of these three engines would be best to swap on a 240sx s13 89?

[mmm240]

You found the right forum, so It could be worse. But it's not what others think is better it's about what you figure out that you want on your own.

http://forums.nicoclub.com/zerosearch

[Coolwhip]

figure you budget for such a swap as in how much you have to spend or willing to spend.

Figure the type of application you wish to use this car for (street, road, track, drift, drag, etc, etc, etc.)

research, research, research the engines you might potentially swap. much is uncovered in this step.

Make a grid, matrix, cost vs. benefit analysis, etc. etc. whatever fits your decision making process.

Determine what engine best fits your needs and budget.

Re-evaluate budget.

multiply by x2.

Then call me

[Orlandos13]

Thanks dude! I think I'll go rb26dett. Thanks again, that chart with info really helped me a lot and saved me time.

[rb20det-240z]

rb20det - 1100 with ecu, trany, wire harness.maf sensor,

rb25det - 1800-2300

rb26dett - to much lol

[rbNissan]

Im a bit of a noob when it comes to Nissans I was a honda guy for the last 10 years and have decided to move on to a more powerful car. I have a 95 nissan 240sx I am looking to swap a motor into the car and I am looking at putting a rb25det motor into my car Ive read this forum. But am still alittle unsure. how reliable would a rb25 motor swap be in the car.

[Coolwhip]

But am still alittle unsure. how reliable would a rb25 motor swap be in the car.

as reliable as you make it. Get a beat up motor or just swap it in without going over it to do maintenance and it can either provide you with a good time of fun or a problem child thing after thing.

Spend some money and do things right as you swap it in, then these things are less likely to fail and cause you problems when using this motor daily.

Its just like anything else in life... Date a girl and not pay her any attention during the beginning of the relationship, she'll either dump you or will create problems for you and you'll be picking up the pieces as you go.

Or you can just start out by learning what she likes, get the bad luggage out of the way, etc. and you'll have a much better prepped relationship.

(now thats some quality advice, people pay for that, )

hope that helps

[kylekinnamon1989]

ive been looking all over this forum for track times!! but nobody has asked them or posted them.. i was wanting to do the rb25 swap on my 90 240sx se and i was wanting to know who has done that and if they have taken it to the tracks and what there 1/4 mile run was!! just straight rb25det swap in the s13 with no upgrades otherthan the stock turbo, maf ecu ect!!! anybody know the track times!!?

[mmm240]

Check youtube and streetfire and whatnot

[kylekinnamon1989]

Check youtube and streetfire and whatnot

i have, i can only seem to find them doing burnouts and idling and **** like that, i wanna see actually track times and stuff you know!?

[mmm240]

Then there's google.

http://forums.nicoclub.com/zerothread/359234

[rbNissan]

Alright then. According to the shop they have replaced the intake manifold with a Greddy Intake Manifold, Greddy Intercooler, Nismo Engine Mounts, Upgraded Fuel pump, Upgrade Water Pump. Now assuming everything else is still in good condition. what would the next step be I have heard that the main bearings are good to replace. Any other suggestions?

[Coolwhip]

what would the next step be I have heard that the main bearings are good to replace. Any other suggestions?

If you are going into the block to do bearings, you should opt to do the crank collar as well. Replace the rod bolts with some ARP hardware.

[igorok]

Hey Guys, im planning to swap a RB25 into my 1992, 325is, what do u think about that???? thanks!!!

[mmm240]

Cool? Sticking with an I6 is cool, but I would swap an M motor in. Good luck and keep us updated!

[Nguyen91]

so i've been doing a bit of research on the RB30 hybrids and i may have a new project in mind.. I'm gonna wait awhile though before doing anything... gotsta get edjukayded..

[916builder]

A drive shaft out of a datsun 620 pu works too for those of you that want to use a single drive shaft. It can be cut to size for around 40 bucks anywhere. I have used this myself for a swap.

[SullivanRacing06]

16000lbs

haha, i think its was more like 24569lbs, what a bad question, here ya go who ever asked the weight diff question

[droppedyota94]

I just have a quick question. I know a guy with a shot rb20 block and i know where i can get a good rb25 block is it possible to use the 20 head on the 25 block? If so what needs to be done to make this work? I now the 20 head isn't as good as the 25 but the 25 block has no head with it and his 20 head is good.

[1992x240sxDriv3r]

I want to get a rb25 for my 240!!!!

[AlmightyWez]

Whats the deal w/ the 26's individual TB setup? Is it worth keeping or is it better to do a regular 25 style intake w/ single TB? I'm still a newb to the RB so I'm not sure which is better to have for a race setup.

[2fast4urass]

1. R34 engines are easy to find on ebay but cost around $8,000

2. can you put HICAS on a regular 240sx

3. how would i make a 240sx all wheel drive

[IrenicShogun]

The RB26 cons are not even constructable, come on man.

[wakabless]

where is a safe place to by the rb25det
and if anyone knows where can I find one in TX I'll be great

[Vkoslak]

There is a shop in Richardson that sells rb25det. A friend of mine bought a H22A there and has had no problems with it. I've bought some r33 brakes and rear subframe from there. They jacked me around a little on shipping. But if I go there in person everything is fine. "jdmenginescorp" on ebay. They have a rb25det for sale right now for $2k. I suggest going in person and picking out the rb25det you want.

[wakabless]

thanks man

[bigblak06]

do rb25 and rb26 you the same motor mount kit

[Midnight Ryderz]

NOT all rb25det's have cermic turbos ONLY the s2 had them. I personally know this because i have an actual r33 skyline gts25t S1 and am running at full boost 17psi STOCK turbo if it was cermic it woudl have blown apart at 1 bar

[rbchick]

Rb20s are great and fun. Even though they arnt one of the more money saving swaps they are definatly worth it and sound better stock then any other 240s ive heard when they get on it

[Kalypso]

what are the three weaknesses of the rb26 for reliability.

I believe they are:

1 - too much oil in the head, extra drain needed.
2 - crank collar.
3 - ...

fill in the third and elaborate please.