Coolwhip

Oil starvation will always occur on a wet sump and crazy driving. Once the oil creeps up off to one side or towards the rear of the sump when launching or cornering hard then the pick up goes dry. Proper windage and baffling is the fighter to those issues as well.

Adding oil is a temp. remedy. Adding a cooler and lines allows more capacity. Only problem is that with more oil in the sump can cause the crank to slap oil and usually ends up in lost HP and slower revs.

Its a pretty deep issue. But with normal use/ modest racing you shouldn't see problems which require the microscope to the nitty gritty.

s13coupedrfter

Syko Performance has them. There web site says they don't but they really do. Just email the owner Gary. His address is on the site.

noeleven

Hm... can you put A/C on the s14 with Rb25det?

gijoe69

yes, you can have A/C in a S14 w/ RB2x motor......its just a matter of fitting the KA AC lines and extended them...any AC shop should be able to do it...

Rizzo

I have a rb25det that is getting close to done and i can not find what oil is recomended for the trans and how much does it take? Thanks in advance.

Solidus311

What is the rb25det oil pressure supposed to be?

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Coolwhip

Idle = +/-25psi

Solidus311

wow something is seriously wrong, I'm running about 10 now. I'm not sure when the oil has been changed last. I just got the car. Will an oil change help?

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bardabe

change oil, see if it goes up, if not the oil pump / bearings are worn.

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bardabe

I had about 20ish at idle, after warm up with 5W-30 Royal Purple

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Solidus311

Yeah I did some research. I'm going to buy a mechanical oil pressure gauge and change the oil and see if it is the same. Bearings as in connecting rod bearings? Also how hard is it to replace the oil pump? Thanks for your input guys.

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sldbyuramg

can somebody please pm me a pic of the RB20 ignition system... in there engine bay...thanks

blackhawk8259

Ok i have a few questions for who ever knows enough about rb swaps vs sr swap.

Ok heres the deal. I am going to do a swap into my 1991 nissan 240sx for a grad project at my high school. heres so guestion.
1. Sr or Rb?
2. Which is cheaper to install?
3. Which is easier to installl?
4. How much to install either?
5. Cost of parts?
6. which i could make the most hp for a low budget?

Thanks so much cuz i really need to get started on this project. It means alot.

blu808

are you joking?

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racer98

just turbo the motor in your car !.
cheapest way.

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racer98

what engine do you have and did you see if your leaking oil from somewhere else ?

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racer98

I have some good ones from another forum.



Easly, guys who have S30's are spending about any where from

$2,500 for a shot motor canada and dropping another $10K in overhaul and rebuild with out tunning.


clean motors are good to start with and the prices are a little higher just depends what are you going to be doing.


example should I get an R32 GT-R. motor is comming out RB30E bottom end with .20 over lots of bottom end work R34 turbos , Single 90mm throttle body....... R34 Z-tune parts, HKS V-Cam set up but run the RB25DE neo head and mill/port grind and trim some items here and there. leave it looking stock 3.1 set up when Im done. run a HKS oil pump and an aftermarket oil cooler.
that right there is $15,000 easly.

even though prices are comming down on R32 motor but the owners who dont take care of them is going up and the quality of the used motors are going into the trash can.

so you have to be careful what you get.

R32 motor RB25DET transmission = $3800
R33 $4800
R34 red $5800
R34 Nur - most of them are just sold as long blocks $++++

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racer98

just as a heads up.................................

you can use a Z32 transmission rear section and use the bell housing from the AWD transmission from the GT-R and you have a transmission set up for your Rb26 2wd set up.

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Jesses240

ok I searched throughout this RB FAQ and didn't find any definitive answers to my issue.


I need to rebuild my 95 r33's rb25det transmission... I need to know part #'s or if there is a US transmission that has the same internals So I can can order syncro's from and rebuild my transmisison.

I also searched google and couldn't find if the internals of the RB and anything in the US that are the same.

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racer98

just get it from a Z32 TT and swap your bell housing on to the rebuilt Z32 TT 5speed also you know you can use the Getrag 6 box as well from the JZ80 TT also I know there is a Cobra R 6 speed from BW you can swap as well.......

takeing it up anoter notch is using the SMG box from the E46 M3 but you will need to swap and modifiy the bellhousing + also figure out the computer for the SMG !

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ProjNightshade

I knew about the Z32 compatibility. Please explain what I would need to do to use the 6spd's you mentioned. I know the supra tt tranny's are way expensive, but I would imagine that the cobra r tranny is significantly less expensive.

racer98

its all about having those items side by side and making slight modifications to fit on the bell housings...


that is the same thing for the BW transmission's

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ProjNightshade

So my understanding is that the input shaft that goes through the clutch is the same as the rb25/z32 and will accept the rb25 clutch? And then I would need to have a new driveshaft made and modify the tranny x-member? Then like you said, just modify (which I assume means just drilling new holes) the rb25 bellhousing to accept the new rear section?

soon2bs13

I read through the FAQs and have some questions of my own to help clear things up for me. Hopefully you guys can help.

1.) The Oil Pressure on the Lower KA harness is 1 wire (I believe), while the Lower RB harness is 2 wire. I read that you cut the KA and put it on the RB. Do you just splice the 2 wires into 1 and put it in?

2.) My RB starts up and has a high idle. When giving it throttle it seems like it is hitting a rev limiter. When I unhooked the MAF it was acting the same with the high idle. Could this be a bad MAF?

3.) I did not read anything that stated of lines that needed to be blocked because of them not being used. Anyone have any information or pictures?

4.) There is a big hose near the firewall on the intake side that needs to be clamped on somewhere but I have no idea where. It is a vaccum but I am not sure where it goes?

Thanks.

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racer98

Nissan parts are interchangeable between car looking into the parts on the Z32 TT might be a good start to find that conector your looking for.

check the IAC and also there are some throttle adj on the itb for that motor if not you might have a air intake leak.

think this might be the problem of an open or missing line from your motor.

cap it off and play with what works best for your motor


now before you go any farther on the motor what is the compression and also is it an r32 or r33 motor ?

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soon2bs13

I have the RB Oil Pressure sender, just was not sure about the wire since one has 1 wire connection and the other has 2.

I will also check into that. Also, I do need a 45 degree pipe to finish the rest of the intercooler piping.

Yeah, there are many lines that are not connected to anything where I could not figure out where they connect to.

Thanks. What do you suggest to be good in order to cap lines off? Sticking a bolt does not seem like a smart idea. hahaha.

I have not checked the compression and I hope it is the R32. I have had the motor for a while and do not remember the exact specs on it.

Thanks for the help!

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DirtyOldMan

whats the cross ref for rb20 clutch? is it z32 300zx?

skylinegtr20

What exactly do you need? I have Nissan Fast, just let me know the product and I can get you the part numbers...

300zx N/A clutch will work in all RB transmissions.

Post a picture of what you need to connect and I can help you out.
Is it right by your Clutch master cylinder or is it farther forward?

racer98

08-29-2008, 08:40 am

u shure about that ?

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skylinegtr20

R32 and R33 yes as they are both push type. R34 6spd Getrag is the only transmission it will not work in due to it been a pull type.

Learned this the hard way years ago when I got my first R32. Purchased a Nismo Coppermix from a reputable seller so I thought, turned out it was from a R34. Didn't get my money back and now have a gigantic doorstop.