Rb25 motor rb20 transmission - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Fredward · 10-16-2012, 10:21 PM

Hello I have been searching and there are so many possibilities for mounting this swap im having a difficult time putting together all the info.

I'm swapping an rb25 into my s13. It has an rbb20 trans and r33 front crossmember with stock mounts.

I know I'll be able to use my s13 driveshaft but im confused if the transmission mounts will line up and if it will clear the sway bar. Can anyone speak on this exact setup? Oh and will I have problems with the shifter position?

Thanks

Fredward · 10-17-2012, 10:09 PM

Bump anyone?

zerodameaon · 10-18-2012, 04:12 AM

Stop where you are... Go buy a RB25 transmission, RB20 trans is like bolting KA trans up to a turbo VQ35. It just isn't a good idea and will not last very long.

N2HIFI · 10-18-2012, 07:57 AM

Should bolt up exactly like in scotch's r32, only thing that might not sit right MAY be the tranny mount which may need some tweaking. My rb20 set up sit perfect with the r32 subframe , rb mounts and my sway bar fit it just sits almost on the the pan but no issues after 2 years

Fredward · 10-18-2012, 11:46 AM

YEah for one I don't care if it last long. I'm just running stock tune so it'll be fine, besides this is a bare bones swap, but thanks for the comment.

Second I figured that would be the only problem. I think the sikky sway bar is more for ls1 swap just read some people talking about it and got me worried.

I should have just posted this on driftstl

fullthrottle · 10-18-2012, 11:55 AM

Quote:

Originally Posted by zerodameaon

Stop where you are... Go buy a RB25 transmission, RB20 trans is like bolting KA trans up to a turbo VQ35. It just isn't a good idea and will not last very long.

How many have you broken?

Sent from my SGH-T769 using Tapatalk 2

Fredward · 10-18-2012, 02:09 PM

Are you stalking me scotch. You always find my posts

*fliprayzin240sx* · 10-19-2012, 04:30 PM

RB20 tranny can handle the RB25 as long as it stays fairly stock. People run this setup all the time to save money since you wont need to get a custom driveshaft.

What people have done in Japan is used an Automatic R33 tranny mount, flip it and lines up to the 4 tranny mount holes to the body.

Fredward · 10-20-2012, 09:30 AM

Ahh. Right on thanks man

10-16-2012, 10:21 PM	#1
Fredward Leaky Injector Join Date: Nov 2011 Location: Missouri Age: 34 Posts: 58 Trader Rating: (1) Feedback Score: 1 reviews	Rb25 motor rb20 transmission Hello I have been searching and there are so many possibilities for mounting this swap im having a difficult time putting together all the info. I'm swapping an rb25 into my s13. It has an rbb20 trans and r33 front crossmember with stock mounts. I know I'll be able to use my s13 driveshaft but im confused if the transmission mounts will line up and if it will clear the sway bar. Can anyone speak on this exact setup? Oh and will I have problems with the shifter position? Thanks

10-19-2012, 04:30 PM	#8
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	RB20 tranny can handle the RB25 as long as it stays fairly stock. People run this setup all the time to save money since you wont need to get a custom driveshaft. What people have done in Japan is used an Automatic R33 tranny mount, flip it and lines up to the 4 tranny mount holes to the body. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

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10-17-2012, 10:09 PM	#2
Fredward Leaky Injector Join Date: Nov 2011 Location: Missouri Age: 34 Posts: 58 Trader Rating: (1) Feedback Score: 1 reviews	Bump anyone?

10-18-2012, 07:57 AM	#4
N2HIFI Leaky Injector Join Date: Apr 2005 Location: St. Charles , MO Posts: 83 Trader Rating: (0) Feedback Score: 0 reviews	Should bolt up exactly like in scotch's r32, only thing that might not sit right MAY be the tranny mount which may need some tweaking. My rb20 set up sit perfect with the r32 subframe , rb mounts and my sway bar fit it just sits almost on the the pan but no issues after 2 years

10-18-2012, 11:46 AM	#5
Fredward Leaky Injector Join Date: Nov 2011 Location: Missouri Age: 34 Posts: 58 Trader Rating: (1) Feedback Score: 1 reviews	YEah for one I don't care if it last long. I'm just running stock tune so it'll be fine, besides this is a bare bones swap, but thanks for the comment. Second I figured that would be the only problem. I think the sikky sway bar is more for ls1 swap just read some people talking about it and got me worried. I should have just posted this on driftstl

10-18-2012, 02:09 PM	#7
Fredward Leaky Injector Join Date: Nov 2011 Location: Missouri Age: 34 Posts: 58 Trader Rating: (1) Feedback Score: 1 reviews	Are you stalking me scotch. You always find my posts

10-20-2012, 09:30 AM	#9
Fredward Leaky Injector Join Date: Nov 2011 Location: Missouri Age: 34 Posts: 58 Trader Rating: (1) Feedback Score: 1 reviews	Ahh. Right on thanks man