rb25 swap - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

drmer1028 · 02-02-2009, 03:27 AM

Ok so I'm a taking a rb25 out of a s14 and dropping it in my s13 is this a straight swap from the s14 to the s13 or is there a lot I have to re do to do this swap. The wireing is done already and I planned on fishing it thru and not cuttin anything. All of hi gauges work will mine or is there something else involved in that?

GSXRJJordan · 02-02-2009, 03:45 AM

Depends on if the S14 is early 95 (OBD1) or later (OBD2). Power for the engine/ecu comes from different places on the OBD2 S14s.

Aside from that, you'll need a new driveshaft, because S14s are a tiiiiny bit shorter overall. Engine/tranny mounts swap right over. Intercooler piping is routed differently on S14's, but you can route it the same as the S13 by cutting the same hole.

drmer1028 · 02-03-2009, 03:09 AM

ok well it is a 95 so we are ok there. the driveshaft ur saying is shorter? and then all his gagues work are mine going to? or is there dif. wiring i have to do?

drmer1028 · 02-03-2009, 03:10 AM

oh and thanks for your expertise ive never done a rb swap before just a ca and sr and single to dual lol.

*fliprayzin240sx* · 02-03-2009, 05:02 AM

Also dont forget, it depends on how the swap is done. Hows the engine mounted? Did he use a RB33 cross member and used the stock mounts or used the stock cross member with an aftermarket swap engine mounts? If its the first, then you'd need to use his cross member too.

As far as the drive shaft, you can more than likely get away with using the S13 shaft that he got.

eklips3 · 02-05-2009, 06:45 PM

the drive shaft wont matter . you can use your stock s13 drive shaft but it has to be on a rb20 tranny , if its a rb25 tranny then you need a custom drive shaft . if it turns out that its a rb20 tranny then the only modification you really have to do is cut the dust sheild around the output shaft on the tranny ( the back )

02-02-2009, 03:27 AM	#1
drmer1028 Join Date: Feb 2009 Location: sac Age: 33 Posts: 3 Trader Rating: (0) Feedback Score: 0 reviews	rb25 swap Ok so I'm a taking a rb25 out of a s14 and dropping it in my s13 is this a straight swap from the s14 to the s13 or is there a lot I have to re do to do this swap. The wireing is done already and I planned on fishing it thru and not cuttin anything. All of hi gauges work will mine or is there something else involved in that?

02-02-2009, 03:45 AM	#2
GSXRJJordan Post Whore! Join Date: May 2006 Location: << 626 >> Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	Depends on if the S14 is early 95 (OBD1) or later (OBD2). Power for the engine/ecu comes from different places on the OBD2 S14s. Aside from that, you'll need a new driveshaft, because S14s are a tiiiiny bit shorter overall. Engine/tranny mounts swap right over. Intercooler piping is routed differently on S14's, but you can route it the same as the S13 by cutting the same hole. __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

02-03-2009, 05:02 AM	#5
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	Also dont forget, it depends on how the swap is done. Hows the engine mounted? Did he use a RB33 cross member and used the stock mounts or used the stock cross member with an aftermarket swap engine mounts? If its the first, then you'd need to use his cross member too. As far as the drive shaft, you can more than likely get away with using the S13 shaft that he got. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

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02-03-2009, 03:09 AM	#3
drmer1028 Join Date: Feb 2009 Location: sac Age: 33 Posts: 3 Trader Rating: (0) Feedback Score: 0 reviews	ok well it is a 95 so we are ok there. the driveshaft ur saying is shorter? and then all his gagues work are mine going to? or is there dif. wiring i have to do?

02-03-2009, 03:10 AM	#4
drmer1028 Join Date: Feb 2009 Location: sac Age: 33 Posts: 3 Trader Rating: (0) Feedback Score: 0 reviews	oh and thanks for your expertise ive never done a rb swap before just a ca and sr and single to dual lol.

02-05-2009, 06:45 PM	#6
eklips3 Zilvia Addict Join Date: Apr 2008 Location: Calgary Canada Age: 31 Posts: 626 Trader Rating: (3) Feedback Score: 3 reviews	the drive shaft wont matter . you can use your stock s13 drive shaft but it has to be on a rb20 tranny , if its a rb25 tranny then you need a custom drive shaft . if it turns out that its a rb20 tranny then the only modification you really have to do is cut the dust sheild around the output shaft on the tranny ( the back )