RB swap for the z31 - Nissan Forum
General Z Discussion For General Z discussion

LinkBack Thread Tools Display Modes
post #1 of 4 Old Jan 19th, 2003, 01:04 AM
Posts: n/a
Question RB swap for the z31

I was checking out a website a week ago about JDM Z31's and found out that there was a Z called the 200ZR and it's powerplant was a RB20det! So as you can well imagine i got curious and asked an importer and he said that not only would the RB20det would fit, but that the RB20 is the same size as the RB25 and RB26 motors, if that is all true, would a RB26dett fit or is this guy pulling my leg. Just to let you know, he suggested i use a R32 skyline front clip,because i could reuse the R32 mounts and all the more obvious reasons to use the front clip. Any answers or info would be great. You gotta admit that a RB-powered Z31 would be one bad ass Z !

Sponsored Links
post #2 of 4 Old Jan 25th, 2003, 10:34 PM
Nissan Enthusiast
Blackbob's Avatar
Joined: Jun 2002
Location: Orlando,Florida
Posts: 53
No he's not pulling your leg. There's actually a guy who was I don't know if he still is. But he's in the airforce and has a website about his Z31 and the RB32 swap I belive he did in his. He's stationed in japan(go figure) so the swap for him was very cheap and very easy.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

"Accelerate you life"

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Dreaming to one day be one of the big dogs......
Blackbob is offline  
post #3 of 4 Old Jan 26th, 2003, 03:00 AM
Nissan Addict
Joined: Dec 2002
Location: sacramento, CA
Posts: 548
Send a message via AIM to esyip Send a message via Yahoo to esyip
here's a little FYI for you before you attempt this swap.

you'll be MUCH better off keeping the VG30ET (if you have one) or getting a VG30ET swapped into your N/A Z31 than going with either the RB20 or RB25 swap. why?

for one of the more obvious reasons, the displacement. it's not that much of a difference over the RB25, but it's a definite advantage over the RB20.

second, the RB20 only makes 215hp, i believe. i don't remember, but it's in that vicinty, maybe a little less. and the RB25 makes 250hp. now, the VG30ET makes about 240hp, that's only 10 less hp than the RB25, but the displacement makes up for some of that.

also, remember that the VG30ET is a SOHC, single turbo, SOHC engine compared to the RB20DET or RB25DET, which are DOHC, single turbo engines. the VG engines are very tough and rigid engines to work on, and with the Z31, you have a bit more room in the engine bay, compared to the Z32s.

also, the RB engines are pretty well-known for the #6 cylinder going out. it's pretty weak from what i understand, and usually needs to be replaced or the internals are recommended to be built up. that's what i've heard.

AIM & Yahoo: esyip
I'm Batman

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
esyip is offline  
post #4 of 4 Old Jan 26th, 2003, 05:34 AM
Nissan Enthusiast
JZK316's Avatar
Joined: Sep 2002
Location: SLC,UT
Posts: 171
Send a message via AIM to JZK316
Real HP #s:
RB20DET-180 hp(Z31 200ZR)

RB25DET-250hp(R33 GTS-T)


With forced induction and motors altogether more displacement doesn't mean more power. Remember that hp to wieght ratio will affect how fast your times are on a track.

'06 SE-R Spec V
Apexi Exhaust
'98 Neon
Lots of go fast stuff
JZK316 is offline  

  Nissan Forum > Nissan Z > General Z Discussion

Quick Reply

Register Now

In order to be able to post messages on the Nissan Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome