RB FAQ - Page 32 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

tschmidt55 · 09-17-2012, 04:15 PM

rb25 questions,i have a rb25 looking for a transmission, my local jdm shop has a RWD tranny for 849.99, and a AWD for 449.99.. would it be cheaper to go with the awd tranny and just plug the transfer case for a rwd or should i just get the rwd? wanna spend as less as possible im trying to get it drivable fast,

smoked240 · 09-17-2012, 04:50 PM

Quote:

Originally Posted by tschmidt55

rb25 questions,i have a rb25 looking for a transmission, my local jdm shop has a RWD tranny for 849.99, and a AWD for 449.99.. would it be cheaper to go with the awd tranny and just plug the transfer case for a rwd or should i just get the rwd? wanna spend as less as possible im trying to get it drivable fast,

Honestly I would go with the rwd. Less hassle that's for sure. Having the transfercase there and not being used, would add some useless weight.

tschmidt55 · 09-17-2012, 04:58 PM

weight doesnt really matter atm i just wanna get it on the road fast as possible. ill prolly go with the awd tranny, but do they actually make just a little plug that pops into the transfercase?? or is there a proper way to do it?

GSXRJJordan · 09-17-2012, 05:01 PM

Quote:

Originally Posted by tschmidt55

weight doesnt really matter atm i just wanna get it on the road fast as possible. ill prolly go with the awd tranny, but do they actually make just a little plug that pops into the transfercase?? or is there a proper way to do it?

Proper way to do it is to weld it shut, still has problems clearing stuff (although as I recall it does have better baffling). Find a cheaper RWD (RB25) trans, they used to go for $900 or whatever but in the last few years the prices have really fallen.

tschmidt55 · 09-17-2012, 05:05 PM

okay, thanks!

tschmidt55 · 09-20-2012, 11:28 AM

another quick, i got a s14 shell wiht pretty much a r32 drive line, its got a complete r32 LSD and everything, as i said before im getting a rb25 transmission, but i wanna know if ill need to get a custom fit drive shaft? or with a stock drive shaft of the rb25 be long enough and or short enough?

FutureFab · 09-23-2012, 01:45 AM

Here are some of the differences I noticed while swapping my rb25det S1 with rb25det Neo.

First off, the S1 was rwd and the Neo I got was Awd automatic, so there may be even more differences between awd and rwd neo.

Ecu plug is very different. S1 on top, Neo on bottom.

Neo ecu

S1 rwd has stamped steel pan, Neo Awd has cast alum pan, same as Gtr. Baffle and sump box are much more elaborate in Awd compared to rwd.

Neo water pump vs Nismo water pump

Neo timing covers are plastic like this, S1/2 are stamped metal.

Neo has larger stock turbo exhaust housing, labeled Op6

Neo uses top feed injectors vs S1/2 use sidefeed.

S1 stock intake manifold has larger diameter runners, about 1/4 inch.

Slightly different shape on intakes going into head. Head port shape is the same tho.
S1 on top, neo on bottom.

S1 water neck is larger diameter.

Crank pulleys are differ, S1 vs Neo.

Block casting is different for Awd Neo, probably not on rwd Neo.
S1 has holes in side of block for tranny bracket supports, they dont exist on awd neo block.

Other things I noticed but didnt photograph...

Cam sensors are different, Neo is plastic Hitachi unit, wiring is mirrored to S1.

Solid lifters and cams in Neo, revs to 8k factory.

Solid lifters are shim on bucket, not bucket on shim like gtr.

Valve covers are slightly differant.

Center garnish on neo between covers is just black, doesnt say "Nissan 2500" like S1.

Head casting is differant where coil packs meet up.

Almost all the wiring connectors are different on Neo.

Water pump pulley on Neo is larger (under driven) compared to S1.

Combustion chamber on neo is lower, vs S1 is recessed into head.

Neo pistons differ from S1.

S1/2 is 9 to 1 comp ratio, neo is 9.5 to one.

S1 has 1 thick washer on each exhaust stud, neo has 1 thick and one thin on exhaust stud.

Intake mani bolts are shorter on neo.

Neo has more bleeder lines for coolant.

Neo vct solinoid uses different clip.

Neo has no external oil drain like S1/2 do on exhaust side.

Probably more differences I didnt notice or remember.

smoked240 · 09-28-2012, 04:05 PM

So my car shut off on me on the way to work this morning and I think I might have narrowed it to my maf. After it happened it wouldn't start. I unplugged my maf and it fired right up. Plugged my maf back in and it died. This will happen about 5-10 times until I plug it in and rev it up and catch the idle. I cleaned my maf at lunch and it ran perfect. Is it just getting dirty? I wiped the inside of my intake and it's filled with black soot.

GSXRJJordan · 09-29-2012, 04:27 PM

Sounds like a faulty MAF, it would have to be REALLY dirty to make the car not start. If the intake side has a bunch of oil your filter either really sucks or the turbo is blowing a ton of oil back into the intake during compressor surge (not likely).

smoked240 · 09-29-2012, 05:55 PM

Quote:

Originally Posted by GSXRJJordan

Sounds like a faulty MAF, it would have to be REALLY dirty to make the car not start. If the intake side has a bunch of oil your filter either really sucks or the turbo is blowing a ton of oil back into the intake during compressor surge (not likely).

Well I cleaned the maf and it ran fine afterwards. It's not so much oil, more of soot from burning oil. I have an apexi power intake filter so I don't think it's that. It would start but I would drive it and it would die and then wouldn't start again until I unplugged the maf.

I just got a coolant leak last night I think. Walked outside from a store and saw coolant leaking and I saw a steady stream from underneath my car. It's right under the intake manifold kinda closer to the back of the block. I'm thinking it could be the coolant port back there but I didn't have any time to investigate it.

Also noticed the knock sensor plug by cylinder 5 was broken, the wire harness plug is fine but the end broke off the sensor. Is only one knock needed cause after thinking about it, I'm pretty sure it's been broken since I did the motor swap but somehow must have missed it.

GSXRJJordan · 09-29-2012, 06:39 PM

Knock sensors aren't a huge deal, but some ECU's will kick into limp mode (reduced timing and lower rev limit I believe) if there's a knock sensor CEL. Check your check engine light, if it's code 55, you're good.

smoked240 · 09-29-2012, 11:19 PM

Quote:

Originally Posted by GSXRJJordan

Knock sensors aren't a huge deal, but some ECU's will kick into limp mode (reduced timing and lower rev limit I believe) if there's a knock sensor CEL. Check your check engine light, if it's code 55, you're good.

That's makes sense, thanks! Speaking of that, I tried checking my codes and never got it to flash. I tried a wire but I don't think it reached the pins. Monday I'll try a paper clip and see if I can get a code. I reset my ecu after I replaced my o2 on Thursday

bigheadJswag · 10-01-2012, 02:09 PM

Really sorry if this is the wrong thread but anyone have a rb20 maf (j60) i think, for sale WITH the pigtail would be greatly appreciated

..thanks

email: [email protected]

EDIT:Or at least sell me the correct pigtail, and does anyone know if the pigtail of a 89-94 maxima will work(on the rb20 maf)..thanks many again!!

10/5/12 EDIT: Last edit untill i find one, plz if someone has a pigtail for the j60 that would be awsome.. email me [email protected]

*fliprayzin240sx* · 10-08-2012, 02:16 PM

I just got done with the swap on my S14. I got the tach dialed in by turn the poteniameter at roughly the 1030 position.

tschmidt55 · 10-09-2012, 07:45 AM

does anyone know if a the drive shaft from a rb25 will fit in my 240? i got a s14 with a rb25 motor and tranny, r32 rear lsd, will the shaft fit? or will it be to long/short?

EnemyS15 · 10-11-2012, 09:42 AM

I remember seeing a thread online with the lengths of rb drive shafts for those who want to get one done locally. I want to say it won't fit, but don't quote me on it since I can't remember exactly.

PG BOOSTED · 10-12-2012, 01:23 AM

Dry Sump or No for a RB25DET S1 thats going to be dailyed/and drifted?

tschmidt55 · 10-14-2012, 03:24 PM

rumor has it, a rb20 transmission fits a rb25 motor without much work, but i also heard a stock ka drive shaft will fit a rb20 transmission and a r32 lsd in a s14? is it true?

2F0-T · 10-15-2012, 10:31 AM

I just got an RB25 and for the harness, I was given an RB26 harness. no ecu for either the 25 or 26. can i still use the harness?

Sileighty_85 · 10-15-2012, 10:48 AM

Quote:

Originally Posted by tschmidt55

rumor has it, a rb20 transmission fits a rb25 motor without much work, but i also heard a stock ka drive shaft will fit a rb20 transmission and a r32 lsd in a s14? is it true?

RB20 tranny Bolts right up to a 25, but DS will length will be dependent on the Engine mounts you use.

Quote:

Originally Posted by 2F0-T

I just got an RB25 and for the harness, I was given an RB26 harness. no ecu for either the 25 or 26. can i still use the harness?

No you can not

Zerolift Autolab · 10-19-2012, 01:30 PM

Fresh stock of the Zerolift RB Engine Mount kits !
Price is $250 Shipped in the US !

*zerooath* · 10-22-2012, 02:08 PM

Does anybody know if the Mckinney Motorsports RB25 to S14 driveshaft is compatible with a RB25DET NEO?

snmlmz · 10-25-2012, 09:01 PM

Quote:

Originally Posted by Sileighty_85

gotta dent it so it can clean the steering shaft, unless you get the SYKO mount kit that comes with a special custom elbow to clear it

the syko mount kit says its for rb25, but will it work for rb20's as well and if not what should i do about it?

Sileighty_85 · 10-26-2012, 05:31 AM

Quote:

Originally Posted by snmlmz

the syko mount kit says its for rb25, but will it work for rb20's as well and if not what should i do about it?

Not sure but if you can find someone thats just selling the elbow it will work on a RB20 Trubo

tschmidt55 · 10-27-2012, 04:29 PM

does anyone know he name of the part that bolts on to the rb25 block and u bolt the tranny to it? most motors have it build part of the block. it's the plate behind the flywheel and it's just a little bigger than the fly wheel. is there an actually name for that part?

GSXRJJordan · 10-27-2012, 09:35 PM

It's a dust shield, doesn't bolt to anything, and isn't necessary.

singlecamslam · 10-28-2012, 12:55 AM

^^ Cant a rock or something fly into your flywheel without that thing.

TheRealSy90 · 10-28-2012, 01:05 AM

If you don't have a transmission bolted to the block?

Syncade · 10-30-2012, 07:26 PM

Quote:

Originally Posted by zerooath

Does anybody know if the Mckinney Motorsports RB25 to S14 driveshaft is compatible with a RB25DET NEO?

Yes it is (as long as you got the correct length for ABS or no-ABS)

tschmidt55 · 11-03-2012, 08:43 PM

can you get me a part number for that cover? ive tried everywhere...

09-23-2012, 01:45 AM	#937
FutureFab Zilvia Member Join Date: Nov 2011 Location: PHX Posts: 276 Trader Rating: (32) Feedback Score: 32 reviews	Here are some of the differences I noticed while swapping my rb25det S1 with rb25det Neo. First off, the S1 was rwd and the Neo I got was Awd automatic, so there may be even more differences between awd and rwd neo. Ecu plug is very different. S1 on top, Neo on bottom. Neo ecu S1 rwd has stamped steel pan, Neo Awd has cast alum pan, same as Gtr. Baffle and sump box are much more elaborate in Awd compared to rwd. Neo water pump vs Nismo water pump Neo timing covers are plastic like this, S1/2 are stamped metal. Neo has larger stock turbo exhaust housing, labeled Op6 Neo uses top feed injectors vs S1/2 use sidefeed. S1 stock intake manifold has larger diameter runners, about 1/4 inch. Slightly different shape on intakes going into head. Head port shape is the same tho. S1 on top, neo on bottom. S1 water neck is larger diameter. Crank pulleys are differ, S1 vs Neo. Block casting is different for Awd Neo, probably not on rwd Neo. S1 has holes in side of block for tranny bracket supports, they dont exist on awd neo block. Other things I noticed but didnt photograph... Cam sensors are different, Neo is plastic Hitachi unit, wiring is mirrored to S1. Solid lifters and cams in Neo, revs to 8k factory. Solid lifters are shim on bucket, not bucket on shim like gtr. Valve covers are slightly differant. Center garnish on neo between covers is just black, doesnt say "Nissan 2500" like S1. Head casting is differant where coil packs meet up. Almost all the wiring connectors are different on Neo. Water pump pulley on Neo is larger (under driven) compared to S1. Combustion chamber on neo is lower, vs S1 is recessed into head. Neo pistons differ from S1. S1/2 is 9 to 1 comp ratio, neo is 9.5 to one. S1 has 1 thick washer on each exhaust stud, neo has 1 thick and one thin on exhaust stud. Intake mani bolts are shorter on neo. Neo has more bleeder lines for coolant. Neo vct solinoid uses different clip. Neo has no external oil drain like S1/2 do on exhaust side. Probably more differences I didnt notice or remember. __________________ futurefabrication.com Last edited by FutureFab; 09-23-2012 at 02:18 AM..

09-28-2012, 04:05 PM	#938
smoked240 Zilvia FREAK! Join Date: Jun 2010 Location: North Dakota Age: 33 Posts: 1,067 Trader Rating: (4) Feedback Score: 4 reviews	So my car shut off on me on the way to work this morning and I think I might have narrowed it to my maf. After it happened it wouldn't start. I unplugged my maf and it fired right up. Plugged my maf back in and it died. This will happen about 5-10 times until I plug it in and rev it up and catch the idle. I cleaned my maf at lunch and it ran perfect. Is it just getting dirty? I wiped the inside of my intake and it's filled with black soot. __________________

09-29-2012, 04:27 PM	#939
GSXRJJordan Post Whore! Join Date: May 2006 Location: San Diego, CA Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	Sounds like a faulty MAF, it would have to be REALLY dirty to make the car not start. If the intake side has a bunch of oil your filter either really sucks or the turbo is blowing a ton of oil back into the intake during compressor surge (not likely). __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

09-29-2012, 06:39 PM	#941
GSXRJJordan Post Whore! Join Date: May 2006 Location: San Diego, CA Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	Knock sensors aren't a huge deal, but some ECU's will kick into limp mode (reduced timing and lower rev limit I believe) if there's a knock sensor CEL. Check your check engine light, if it's code 55, you're good. __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

10-01-2012, 02:09 PM	#943
bigheadJswag Join Date: Jul 2012 Location: Florida Posts: 23 Trader Rating: (0) Feedback Score: 0 reviews	Really sorry if this is the wrong thread but anyone have a rb20 maf (j60) i think, for sale WITH the pigtail would be greatly appreciated..thanks email: [email protected] EDIT:Or at least sell me the correct pigtail, and does anyone know if the pigtail of a 89-94 maxima will work(on the rb20 maf)..thanks many again!! 10/5/12 EDIT: Last edit untill i find one, plz if someone has a pigtail for the j60 that would be awsome.. email me [email protected] __________________ Last edited by bigheadJswag; 10-08-2012 at 04:32 PM..

09-17-2012, 04:15 PM	#931
tschmidt55 Leaky Injector Join Date: Apr 2012 Location: kitchener Age: 29 Posts: 87 Trader Rating: (0) Feedback Score: 0 reviews	rb25 questions,i have a rb25 looking for a transmission, my local jdm shop has a RWD tranny for 849.99, and a AWD for 449.99.. would it be cheaper to go with the awd tranny and just plug the transfer case for a rwd or should i just get the rwd? wanna spend as less as possible im trying to get it drivable fast,

09-17-2012, 04:58 PM	#933
tschmidt55 Leaky Injector Join Date: Apr 2012 Location: kitchener Age: 29 Posts: 87 Trader Rating: (0) Feedback Score: 0 reviews	weight doesnt really matter atm i just wanna get it on the road fast as possible. ill prolly go with the awd tranny, but do they actually make just a little plug that pops into the transfercase?? or is there a proper way to do it?

09-17-2012, 05:05 PM	#935
tschmidt55 Leaky Injector Join Date: Apr 2012 Location: kitchener Age: 29 Posts: 87 Trader Rating: (0) Feedback Score: 0 reviews	okay, thanks!

09-20-2012, 11:28 AM	#936
tschmidt55 Leaky Injector Join Date: Apr 2012 Location: kitchener Age: 29 Posts: 87 Trader Rating: (0) Feedback Score: 0 reviews	another quick, i got a s14 shell wiht pretty much a r32 drive line, its got a complete r32 LSD and everything, as i said before im getting a rb25 transmission, but i wanna know if ill need to get a custom fit drive shaft? or with a stock drive shaft of the rb25 be long enough and or short enough?

10-08-2012, 02:16 PM	#944
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	I just got done with the swap on my S14. I got the tach dialed in by turn the poteniameter at roughly the 1030 position. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

10-09-2012, 07:45 AM	#945
tschmidt55 Leaky Injector Join Date: Apr 2012 Location: kitchener Age: 29 Posts: 87 Trader Rating: (0) Feedback Score: 0 reviews	does anyone know if a the drive shaft from a rb25 will fit in my 240? i got a s14 with a rb25 motor and tranny, r32 rear lsd, will the shaft fit? or will it be to long/short?

10-11-2012, 09:42 AM	#946
EnemyS15 Nissanaholic! Join Date: Jul 2006 Location: Tampa, Florida Posts: 1,677 Trader Rating: (14) Feedback Score: 14 reviews	I remember seeing a thread online with the lengths of rb drive shafts for those who want to get one done locally. I want to say it won't fit, but don't quote me on it since I can't remember exactly.

10-12-2012, 01:23 AM	#947
PG BOOSTED Zilvia Junkie Join Date: Jul 2011 Location: FL Posts: 309 Trader Rating: (0) Feedback Score: 0 reviews	Dry Sump or No for a RB25DET S1 thats going to be dailyed/and drifted?

10-14-2012, 03:24 PM	#948
tschmidt55 Leaky Injector Join Date: Apr 2012 Location: kitchener Age: 29 Posts: 87 Trader Rating: (0) Feedback Score: 0 reviews	rumor has it, a rb20 transmission fits a rb25 motor without much work, but i also heard a stock ka drive shaft will fit a rb20 transmission and a r32 lsd in a s14? is it true?

10-15-2012, 10:31 AM	#949
2F0-T Leaky Injector Join Date: Feb 2010 Location: Proctorville OH Age: 30 Posts: 57 Trader Rating: (1) Feedback Score: 1 reviews	I just got an RB25 and for the harness, I was given an RB26 harness. no ecu for either the 25 or 26. can i still use the harness?

10-19-2012, 01:30 PM	#951
Zerolift Autolab Post Whore! Join Date: Jan 2008 Location: Fairfield, OH 45014 Age: 41 Posts: 2,804 Trader Rating: (12) Feedback Score: 12 reviews	Fresh stock of the Zerolift RB Engine Mount kits ! Price is $250 Shipped in the US ! __________________ Contact: Phone - 513-874-2508 AIM - ZLR0bert Email - [email protected] Zerolift facebook - http://www.facebook.com/Zerolift

10-22-2012, 02:08 PM	#952
zerooath 98 Kouki Slicktop. Tip Dealer! Join Date: Nov 2006 Location: Biloxi, Mississippi! Age: 35 Posts: 359 Trader Rating: (0) Feedback Score: 0 reviews	Does anybody know if the Mckinney Motorsports RB25 to S14 driveshaft is compatible with a RB25DET NEO? __________________

10-27-2012, 04:29 PM	#955
tschmidt55 Leaky Injector Join Date: Apr 2012 Location: kitchener Age: 29 Posts: 87 Trader Rating: (0) Feedback Score: 0 reviews	does anyone know he name of the part that bolts on to the rb25 block and u bolt the tranny to it? most motors have it build part of the block. it's the plate behind the flywheel and it's just a little bigger than the fly wheel. is there an actually name for that part?

10-27-2012, 09:35 PM	#956
GSXRJJordan Post Whore! Join Date: May 2006 Location: San Diego, CA Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	It's a dust shield, doesn't bolt to anything, and isn't necessary. __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

10-28-2012, 12:55 AM	#957
singlecamslam Post Whore! Join Date: Apr 2008 Location: Norcal Posts: 2,534 Trader Rating: (10) Feedback Score: 10 reviews	^^ Cant a rock or something fly into your flywheel without that thing. __________________ Nothing says racecar like a stock car with no interior.

11-03-2012, 08:43 PM	#960
tschmidt55 Leaky Injector Join Date: Apr 2012 Location: kitchener Age: 29 Posts: 87 Trader Rating: (0) Feedback Score: 0 reviews	can you get me a part number for that cover? ive tried everywhere...