Who Has Actual Running Rbs?

Post by **apex_7** » Mon Oct 06, 2003 12:05 pm

I've got an 89 HB w/ an RB20. It's been running since May. I was driving it daily till I ran into some reliability issues. The car is currently awaiting a new radiator and some new hoses. I'm repainting it while it's down too. My current best time at the track is a 13.9 @ 102mph. I still have yet to install my KAAZ 2-way lsd. Next mod will be a 63-trim t3/t4 and mandrel bent IC piping. I've already got higher-flowing injectors, so I just need to get some free time and order/make the new piping. My personal goal is to hit high 12's by next summer and drive it to work everyday (if i want). I feel that it's obtainable; what do you guys think?

Post by **PROJECTRB240SX** » Mon Oct 06, 2003 12:05 pm

By far it is totally obtainable, LSD and a Turbo will get you there.

If the r33 has it on the lower harness find the pin code and run it direct its only two wires each correct? I'll go look at my rb25 in a minute.

Website · Post by **s13sr20chris** » Mon Oct 06, 2003 12:05 pm

What is required to make the RB25DET fit into a 240SX?All that is needed is the clip, driveline, tools, patience, and parts for extending/crimping wires.

What modifications are necessary to the 240SX?To make the engine fit properly with stock mounts, you will have to accomodate a few things.

As with any turbo swap, you will need to cut holes for intercooler piping. You will need to shave (using a dremel or similar tool) a small portion of the turbo manifold that connects to the downpipe. This is necessary for steering rack clearance and does no harm as long as you do not shave too much off. You will need to make approximately a 6" cut of the hood skeleton to achieve hood clearance (which isn't visible from outside the car). You will need either a RB25DET driveshaft or a custom one made to fit the RB25DET engine.

How difficult is the RB25DET to wire?When I wired my car, I kept my 240SX interior harness (runs dash, headlights, tail lights, etc...) and got rid of the KA engine harness and ECU. I replaced that harness with the engine harness and ECU from the RB25DET. I then had to extend wires for the Gauge cluster and Ignition so that they would reach the LHD side of the car. I then integrated 5 wires from each of the harnesses ignition systems and made a power terminal where both harnesses were attached at the front of the car so that they would each receive power.

Can you use the Stock RB25DET mounts?Yes, the stock engine mounts are bolted to the stock crossmember which shares the same bolt pattern as the KA crossmember when bolting up to the 240SX chassis. The transmission mount can be used, but must be taken off and flipped backwards. After you do this, you should add a spacer 1.5" thick made out of anything such as wood, metal, plastic, rubber, etc... as long as it will not collapse.

i copied all of that from night szevyn's website. it seems a little too good to be true. what do you guys think? by the way i am on the verge of a sr or rb swap into a 240. its not my car but the guy who owns it is technically inept so i will be doing the swap for a small fee. we are friends so i promised i would get him the best motor i could, but if there are too many extras to buy when doing the swap i will just go sr.

Post by **PROJECTRB240SX** » Mon Oct 06, 2003 12:05 pm

There are better ways to wire it, but essentially it is correct.

Post by **PROJECTRB240SX** » Mon Oct 06, 2003 12:05 pm

The RB25 and SR swaps are similar in cost, going RB20 will save a Grand or so and have similar power output as the SR

Website · Post by **s13sr20chris** » Mon Oct 06, 2003 12:05 pm

thanks, maybe ill take your word for it then since you have nothing to gain. sorry for hijacking the thread also.

Post by **PROJECTRB240SX** » Mon Oct 06, 2003 12:05 pm

I DON'T CARE, SOME TIMES ITS EASIER TO GET NOTICED POSTING IN SOMEONE ELSES THREAD THAN IT IS STARTING A NEW ONE. AND I'M JUST TRYING TO HELP YOU MAKE AN EDUCATED DECISION, THESE ARE ALL GREAT MOTORS THAT OFFER DIFFERENT DISTINCT BENEFITS.

Website · Post by **s13sr20chris** » Mon Oct 06, 2003 12:05 pm

oh right on about the great motors thing. i work on nissans all day every day and i love them. the rb is not something i am familiar(hands on) with. by the way, whats the redline on a stock rb20det?

Post by **PROJECTRB240SX** » Mon Oct 06, 2003 12:05 pm

7500 IIRC. BUT THE STOCK MOTOR IS GOOD TO 8000.

Website · Post by **s13sr20chris** » Mon Oct 06, 2003 12:05 pm

i figured i could go at least 8k, but i was not sure about fuel cut. you my friend are a gentleman and a scholar.

Post by **PROJECTRB240SX** » Mon Oct 06, 2003 12:05 pm

WELL DON'T QUOTE ME ON THAT 7500 BUT I KNOW THAT 8K IS TRUE BECAUSE THAT IS THE STANDARD ECU RETUNE DONE.

Post by **wga240** » Mon Oct 06, 2003 12:05 pm

My RB20 came with an aftermarket ECU with an 8700 rpm rev limiter...don't ask me how I know

I didn't mean to rev that high, but at least nothing blew up

Post by **spec-v5150** » Mon Oct 06, 2003 12:05 pm

musicsurfman wrote:WELL DON'T QUOTE ME ON THAT 7500 BUT I KNOW THAT 8K IS TRUE BECAUSE THAT IS THE STANDARD ECU RETUNE DONE.

you are correct. My tach started bouncing back at 7500. I tested it three or four days ago

Post by **PROJECTRB240SX** » Mon Oct 06, 2003 12:05 pm

COOL I THOUGHT SO. I JUST COULDN'T REMEMBER WHAT THE EXACT NUMBER WAS.

Post by **PROJECTRB240SX** » Mon Oct 06, 2003 12:05 pm

THANKS SPEC

Website · Post by **frosted flakes** » Mon Oct 06, 2003 12:05 pm

RB20DET SWAP COMPLETE

check out my page

http://members.cardomain.com/funkycrzyshiet

Post by **ilkhan** » Mon Oct 06, 2003 12:05 pm

"As with any turbo swap, you will need to cut holes for intercooler piping. You will need to make approximately a 6" cut of the hood skeleton to achieve hood clearance (which isn't visible from outside the car).

A: Cut holes in what?

B:I thought I saw on here a while back that there was a way to position the RB where you dont have to touch the hood. Lower and further back(?). Anybody know what that was?

Post by **gabossie** » Mon Oct 06, 2003 12:05 pm

To position the RB in a way that you don't have to cut the hood, you have to use custom mounts from McKinney or someone of the sorts. If you use the RB x-member and stock mounts, the ic piping hits the hood.

Post by **undertaker** » Mon Oct 06, 2003 12:05 pm

My Silvia is now finished (for now!), it goes really well but has big traction issues.

The engine feels big and torquey but still revs nicely.

Page 4:http://www.cardomain.com/memberpage/351709

Post by **JonPowell** » Mon Oct 06, 2003 12:05 pm

I love the sound of the Rb25DET. I made some video of my car over the holiday weekend(no way to get it in digital form however) and it sounds GREAT! I have the Blitz Realize TT exhaust for the ECR33 and WOW it sounds amazing. Even free revving it sounds great. It is going to make me cry when we get some real snow and I have to put it away for the winter.

Post by **HybridOne** » Mon Oct 06, 2003 12:05 pm

mine runs. RB20DET into my '96 S14. I put it in a ditch last week, so it's not on the road right now. I need to find the stock S15 front bumper and fenders. I have the hood and headlights. Might as well do the conversion. since i destroyed my front bumper.

Post by **rbsileighty** » Mon Oct 06, 2003 12:05 pm

undertaker wrote:My Silvia is now finished (for now!), it goes really well but has big traction issues. The engine feels big and torquey but still revs nicely.

Page 4:http://www.cardomain.com/memberpage/351709

Love the car bud. Excellent color, gives the car a really clean old school look.

What's the story on the 5 lug? I assume since you didn't say anything about a conversion your's came that way. I am very jealous of j-spec cars.

Post by **undertaker** » Mon Oct 06, 2003 12:05 pm

thanks rbsil80

i did the 5 lug conversion myself, rear is easy as the R33 subframe has the hubs on it (although i advise against using the R33 unit as it the rear shock mounts are wrong, get R32)for the front you need S14/15 five stud front hubs and lower control arm ball joints to suit, S13 ones do not. it would be a lot easier and cheaper to stay 4 stud depending on what wheels you run.

apparently there is a 300ZX model with suitable front hubs but i have never seen one here.

Post by **fito** » Mon Oct 06, 2003 12:05 pm

95' 240sx installed NEO RB25 engine. Insted of waisting time and money on harness, I got a Microtech ECU and had it up and running in 2 days and the best part is that I can play with timing and fuel all I whant. It has Greedy front mount, 3in. exhaust with titanium muffler, everything else is stock. At 8 psi. it made 329 HP at the wheels. Iam now waiting for all the aftermarket parts I orderded (hoping to get 600 to 700HP).

Post by **rbsileighty** » Mon Oct 06, 2003 12:05 pm

fito wrote:95' 240sx installed NEO RB25 engine. Insted of waisting time and money on harness, I got a Microtech ECU and had it up and running in 2 days and the best part is that I can play with timing and fuel all I whant. It has Greedy front mount, 3in. exhaust with titanium muffler, everything else is stock. At 8 psi. it made 329 HP at the wheels. Iam now waiting for all the aftermarket parts I orderded (hoping to get 600 to 700HP).

Great job fito. I am a big advicate of standalones myself (basically whatever brand has a place near you that specializes in a particular quality brand). Be careful playing with high boost and that hi CR, granted if you are using a standalone and have had it tuned, it looks like I don't need to remind you of such things.

Website · Post by **s13sr20chris** » Mon Oct 06, 2003 12:05 pm

329 at the wheels on 8psi? is that a missprint? if no thats fantastic.

Post by **Joe** » Mon Oct 06, 2003 12:05 pm

update: my wiring got to tucson yesterday, going down there this weekend from phoenix to HOPEFULLY get it to finally run

Post by **Joe** » Mon Oct 06, 2003 12:05 pm

ive waited months to say this

I DO!

Post by **apex_7** » Mon Oct 06, 2003 12:05 pm

My RB20 revs to 8150rpm. After that it bounces down and pops and shoots flames and stuff. I don't know if it's b/c I removed the speedlimiter, but here's the link http://www.rb20det.com/speedlimiter.html

Post by **PROJECTRB240SX** » Mon Oct 06, 2003 12:05 pm

SOUNDS LIKE AFTERMARKET ECU.

Who Has Actual Running Rbs?

RB25DET Silvia

Re: RB25DET Silvia

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