RB FAQ - Page 10 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Coolwhip · 05-08-2008, 06:17 PM

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 · 05-17-2008, 05:07 AM

Quote:

Originally Posted by GoodOl'S13

Where can i find intercooler piping for a S13 rb25 w/ Greddy IM?

+rep for help

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 · 06-04-2008, 11:07 AM

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

gijoe69 · 06-04-2008, 12:19 PM

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 · 06-19-2008, 10:34 AM

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 · 07-02-2008, 05:19 PM

What is the rb25det oil pressure supposed to be?

Coolwhip · 07-02-2008, 05:45 PM

Idle = +/-25psi

Solidus311 · 07-02-2008, 06:57 PM

Quote:

Originally Posted by Coolwhip

Idle = +/-25psi

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?

bardabe · 07-02-2008, 08:43 PM

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

bardabe · 07-02-2008, 08:43 PM

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

Solidus311 · 07-02-2008, 08:47 PM

Quote:

Originally Posted by bardabe

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

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.

sldbyuramg · 07-09-2008, 10:59 AM

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

blackhawk8259 · 08-23-2008, 11:19 PM

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 · 08-23-2008, 11:22 PM

are you joking?

racer98 · 08-23-2008, 11:24 PM

Quote:

Originally Posted by 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.

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

racer98 · 08-23-2008, 11:24 PM

Quote:

Originally Posted by 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?

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

racer98 · 08-23-2008, 11:34 PM

Quote:

Originally Posted by blu808

are you joking?

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 $++++

racer98 · 08-24-2008, 11:11 PM

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.

Jesses240 · 08-29-2008, 09:40 AM

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.

racer98 · 08-29-2008, 10:00 AM

Quote:

Originally Posted by 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.

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 !

ProjNightshade · 08-29-2008, 11:04 AM

Quote:

Originally Posted by 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

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 · 08-29-2008, 11:08 AM

Quote:

Originally Posted by 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.

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

ProjNightshade · 08-29-2008, 11:13 AM

Quote:

Originally Posted by 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

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 · 11-04-2008, 08:30 PM

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.

racer98 · 11-04-2008, 09:10 PM

Quote:

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?

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.

Quote:

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?

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.

Quote:

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?

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

Quote:

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?

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 ?

soon2bs13 · 11-04-2008, 10:43 PM

Quote:

Originally Posted by 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.

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.

Quote:

Originally Posted by racer98

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.

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

Quote:

Originally Posted by racer98

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

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

Quote:

Originally Posted by racer98

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

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.

Quote:

Originally Posted by racer98

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

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!

DirtyOldMan · 11-20-2008, 12:15 AM

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

skylinegtr20 · 01-01-2009, 11:26 PM

Quote:

Originally Posted by 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.

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

Quote:

Originally Posted by DirtyOldMan

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

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

Quote:

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

Post a picture of what you need to connect and I can help you out.

Quote:

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?

Is it right by your Clutch master cylinder or is it farther forward?

racer98 · 01-02-2009, 12:47 AM

Quote:

Originally Posted by skylinegtr20

what exactly do you need? I have nissan fast, just let me know the product and i can get you the part numbers...

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?

08-29-2008, 08:40 am

Quote:

300zx n/a clutch will work in all rb transmissions.

u shure about that ?

skylinegtr20 · 01-02-2009, 04:34 AM

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.

07-02-2008, 05:19 PM	#276
Solidus311 Leaky Injector Join Date: May 2008 Location: MD Age: 40 Posts: 97 Trader Rating: (0) Feedback Score: 0 reviews	What is the rb25det oil pressure supposed to be? __________________ cardomain.com/ride/3113705

07-02-2008, 08:43 PM	#279
bardabe Post Whore! Join Date: Aug 2005 Location: SoCal Age: 34 Posts: 4,719 Trader Rating: (10) Rides Gallery: bardabe Feedback Score: 10 reviews	change oil, see if it goes up, if not the oil pump / bearings are worn. __________________ Review Thread

07-02-2008, 08:43 PM	#280
bardabe Post Whore! Join Date: Aug 2005 Location: SoCal Age: 34 Posts: 4,719 Trader Rating: (10) Rides Gallery: bardabe Feedback Score: 10 reviews	I had about 20ish at idle, after warm up with 5W-30 Royal Purple __________________ Review Thread

08-23-2008, 11:19 PM	#283
blackhawk8259 Join Date: Aug 2008 Location: bellingham Posts: 47 Trader Rating: (1) Feedback Score: 1 reviews	Swap questions? 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.

08-23-2008, 11:22 PM	#284
blu808 Post Whore! Join Date: Dec 2002 Location: Campbell, Ca Age: 41 Posts: 5,010 Trader Rating: (3) Feedback Score: 3 reviews	are you joking? __________________

05-08-2008, 06:17 PM	#271
Coolwhip Zilvia Junkie Join Date: Oct 2003 Location: Florida Posts: 497 Trader Rating: (1) Feedback Score: 1 reviews	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.

06-04-2008, 11:07 AM	#273
noeleven Join Date: Nov 2004 Location: LA Posts: 45 Trader Rating: (0) Rides Gallery: noeleven Feedback Score: 0 reviews	Hm... can you put A/C on the s14 with Rb25det?

06-04-2008, 12:19 PM	#274
gijoe69 Zilvia Junkie Join Date: May 2003 Location: San Francisco, CA Age: 39 Posts: 366 Trader Rating: (1) Feedback Score: 1 reviews	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...

06-19-2008, 10:34 AM	#275
Rizzo Join Date: Dec 2006 Location: central illinois Posts: 49 Trader Rating: (0) Feedback Score: 0 reviews	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.

07-02-2008, 05:45 PM	#277
Coolwhip Zilvia Junkie Join Date: Oct 2003 Location: Florida Posts: 497 Trader Rating: (1) Feedback Score: 1 reviews	Idle = +/-25psi

07-09-2008, 10:59 AM	#282
sldbyuramg Zilvia Member Join Date: Jan 2008 Location: san diego Age: 42 Posts: 276 Trader Rating: (1) Feedback Score: 1 reviews	can somebody please pm me a pic of the RB20 ignition system... in there engine bay...thanks

08-24-2008, 11:11 PM	#288
racer98 Post Whore! Join Date: Jul 2003 Location: 六本木 Age: 46 Posts: 6,202 Trader Rating: (128) Feedback Score: 128 reviews	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.

08-29-2008, 09:40 AM	#289
Jesses240 Leaky Injector Join Date: Aug 2006 Location: Oregon Age: 39 Posts: 74 Trader Rating: (0) Feedback Score: 0 reviews	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. __________________ --Jesse R33

11-04-2008, 08:30 PM	#294
soon2bs13 Zilvia Junkie Join Date: Jun 2006 Location: TN Posts: 482 Trader Rating: (1) Feedback Score: 1 reviews	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. __________________ neg repping is cool!!

11-20-2008, 12:15 AM	#297
DirtyOldMan Zilvia Member Join Date: Nov 2008 Location: NORCAL - SAC NOT Bayarea NOT So Cal NOT Anywhere Else! JUST SACRAMENTO Age: 34 Posts: 275 Trader Rating: (0) Feedback Score: 0 reviews	whats the cross ref for rb20 clutch? is it z32 300zx?

01-02-2009, 04:34 AM	#300
skylinegtr20 Join Date: Dec 2008 Location: Texas Posts: 31 Trader Rating: (0) Feedback Score: 0 reviews	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.