Jump to content
SAU Community

Rb25 Motor Using Rb20 Box

DUU MA

By DUU MA,
in Australian Capital Territory

 Share

Recommended Posts

DUU MA Contributor

DUU MA

Posted
Posted

hi just wanting to know who out there is using a rb20 gearbox behind an rb25

how much power do you have? what kind of clutch do you use and how long has it lasted.

does anyone do track/drift and how did it hold up then?

Im looking at getting around the 220 - 230atkw with the upgrades that im doing and just needed some more info on how the box will hold up.

thanks

Link to comment
https://www.sau.com.au/forums/topic/264707-rb25-motor-using-rb20-box/
Share on other sites
StinkyPoo Mentor

StinkyPoo

Posted
Posted (edited)

Got max of 236rwkw in front of my RB20DET box. I go drifting and 2nd gear syncro is getting worn. I have to change gears slowly now until i change the syncro's.

I figure, I can break three RB20DET boxes before it costs me 1 RB25DET box.

Edited by StinkyPoo
MANG Proficient

MANG

Posted
Posted

ive had 250-260rwkw from the RB25DET w/RB20DET gearbox for about 1.5-2 years, treated pretty rough, still feels pretty strong.

as stinkypoo says 3 RB20 box's for one 25 box.

the different mounts, speedo drive, tailshafts and possibly installation would probably add up around a grand aswell. so more like 5 RB20 box's in the end.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • QB6SAGR
      Tein Circuit Master- rebuild worth it?

      By QB6SAGR · Posted

      Thanks guys,  Yeah I should at least have them dynoed, at least then I know what I've got as a starting point.  The springs on these are hard as rocks. I vaguely remember Russman saying he was going to sell the shocks to me with the rocks fitted, as he was keeping the softer springs for his new setup.  I didn't click at the time but of course that was to let me know the shock/spring wouldn't be matched.  I also remember pricing up new springs around 2014-15, but, house, money etc. it never happened. So that was another reason to have them rebuilt. I have rebuilt the forks on many motorcycles so I think I could handle the seals on these easily enough, but getting the valving right would be a rabbit hole I cbf exploring.  Duncan, interesting to hear RP was tuning these back then. I might give them a call.  In the mean time I have been busy fitting sway bars. The Whiteline rear sway bar I purchased 15 years ago finally got fitted, along with the Whiteline front bar that showed up last week. Just waiting on new links for the front sway bar to finish that off.  And my spare set of advan AVS VS5's should be back from the powder coaters in a Pearl White finish sometime this week, with a set of Hankook RS4's lined up for fitting.  And then I just have all the suspension bushes to do. A comprehensive kit is on the way... Lots to do before the Ararat hill climb. Cheers guys 🍻   
    • funkymonkey
      Howdy Y'all

      By funkymonkey · Posted

      Nice car! I’m glad folks in the US have gotten past the FnF and are buying real cool cars like the 260RS I was with a bunch of mates in Portland about a year ago and spotted a green Stagea (just a regular 2.5T AWD) parked about 2 blocks away and they were like “a what?” So I made a bet with them for a round of beers and said “ok one of you run down there and tell me if the steering wheel is on the correct side” 5 mins later the American comes trudging back up the hill and goes “he’s right guys. Ok what beer do you want?”
    • Dose Pipe Sutututu
      Starting again

      By Dose Pipe Sutututu · Posted

      Should replace OR drop the tank, give it's good clean. Might be worth replacing that entire fuel level/pump/cradle thing with this: https://frenchysperformancegarage.com/products/fpg-s13-180sx-r32gtst-single-pump-hanger-kit-billet-hat-6-v3-fpg-089?gQT=2  
    • R33_Guy
      Speed Sensor replacement

      By R33_Guy · Posted

      Thank you so much for the help
    • GTSBoy
      Speed Sensor replacement

      By GTSBoy · Posted

      Yes it is ATF. I quote @Duncan "it takes a good synthentic auto trans fluid like Castrol Transmax Z" It's not a diff. It's a transfer case. Totally different thing. Yes, fluid will come out the sender hole. No you do not really need to drain it. Just pull the old, quickly poke the new, clean up and top up. But realistically, you should probably take the opportunity to change it anyway.
×
×
  • Create New...