Jump to content
SAU Community

R32 Rb25de Valve Spring upgrade

Prof_Finesser

By Prof_Finesser,
in Engines & Forced Induction

 Share

Recommended Posts

Prof_Finesser Enthusiast

Prof_Finesser

Posted
Posted

Hello I had pulled the head off the rb25de from an r32 to check if oil was getting to the head and my buddy told me that these heads tend to float valves around 400whp so I decided that since the head was off again to get upgraded valve springs.  I've read on another post that it would take rb20 valve springs but can anyone confirm?  I'm going to be going with the super tech valve spring kit with retainers.  They have a kit for rb20 and 25.  

Link to comment
https://www.sau.com.au/forums/topic/484328-r32-rb25de-valve-spring-upgrade/
Share on other sites
Prof_Finesser Enthusiast

Prof_Finesser

Posted
  • Author
Posted (edited)
39 minutes ago, GTSBoy said:

image.thumb.png.d6ecf052a37fd3aa05f431d19682b624.png

On the Kelford and other spring website it says rb25(with NVCS)  and they specifically have springs for rb20/rb25de(nonVCT) I went with the super tech valve spring kit for rb20.  I believe the ones on supertech are for rb25de are for r33 rb25s with vct

Edited by Prof_Finesser
Prof_Finesser Enthusiast

Prof_Finesser

Posted
  • Author
Posted
On 8/29/2007 at 12:07 AM, Cubes said:

Ahh I was under the impression you went with the R32 RB25DE head. :D

Yes the R33's run 2 different length springs; they are a tad more than the r32 springs from Performance springs in QLD.

The factory springs may very well do the job with the r33's. The problem witht he R32's is that the springs they use in the R32 Rb25DE head are the same as they are in the RB20DET head. While they are fine controlling a smaller valve with the rb20; once you shove more weight behind from the rb25's head them they struggle. :S

Let us know the seat pressure just for my own curiosity. If need be shim them up a touch to get around 50-55 pounds.

this is what I also found earlier in the day

Prof_Finesser Enthusiast

Prof_Finesser

Posted
  • Author
Posted
14 hours ago, GTSBoy said:

Hmm. I guess this makes the thread good reference material for the possibly two or three people in the future who will try something similar with an R32 25 head.

yea I know most people don't really build these so.

Prof_Finesser Enthusiast

Prof_Finesser

Posted
  • Author
Posted
4 hours ago, GTSBoy said:

There never was that many of them in the first place, and it was all such a long time ago. Like hen's teeth. Most people, including myself, apparently, barely even remember that the R32 RB25 was closer to the RB20 than the R33 engines.

This was my first skyline I used to have a e36 m3 and getting this engine I did have to do some research about a couple things but not too much.  

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

    • The Bogan
      NC MX5

      By The Bogan · Posted

      So, version 4 intake is on its way I was looking at these a while ago but at around $200 or more it was a little pricey for something that might not work, but, I had it in my watch list, but, I got a message saying it was on special, and I had a code thingie to use, it eventually came in at $120 delivered, so BAM, BUY NOW.....LOL I'll need to have a look when it arrives but I feel it will "look" better than what I currently have, as it comes with a PCV fitting, so I will be able to get rid of the alloy pipe that goes to the throttle body with the PCV fitting  Well, that's what the voices in my head are telling me  Oh, and this happened today Yeap, it was a Trojan, and it was cheap, so I headed back to the hardware store and actually spent a little bit more on a heavy duty,  one that was actually recommended by a plumber mate, a Cyclone one with a fibreglass handle that is actually rated for clay The broken shovel will eventually be "modified" into a short handle shovel
    • MBS206
      What should I do next to hold the head on

      By MBS206 · Posted

      When you pulled it off, there is no signs of blown head gasket? Is it possible you have some other issues going on? Possible cracked blocked? Or do you think it's straight up lifting the head? Did you check what the head was torqued to before pulling it down (To see if possibly they're stretching, or starting to break threads out etc)?
    • jez NF
      The Evolution Of "night Fury"

      By jez NF · Posted

    • Rezz
      Chris' Toyota Mark ii JZX110

      By Rezz · Posted

      Seems like a decent result for a modded JZX110. They are bulky in comparison to the 100 and 90 models (which I'd prefer myself) but they are getting very few and far between here in JP these days. Thanks for the detailed review and the import process into the UK. I also have a car which I'm hoping to export from Japan at some stage so it's good to know if someone from the UK was interested in it. By the way the corrosion underneath is par for the course for cars which were located in/near the mountains or along the Japan sea coastline. They get huge amounts of snow every winter and the sodium chloride is used on the roads. Many cars have some kind of rubber like treatment underneath but they tend to limit it to the wheel arches underbody and fuel tank. Suspension arms and sub-frames will have similar corrosion to your JZX110 which is a common sight. See it all the time and car dealers here generally don't even mention it unless asked.
    • Kinkstaah
      new 1.5 LSD issues/concerns

      By Kinkstaah · Posted

      If the sound goes away when you clutch in, the 1.5/2 way diffs are just shit, and you are a normal person. The diff is likely "fine" but driving at anything under 30kmh is a violent horrible experience. It would be exaggerated with solid diff bushings and subframe bushings if you have those.
×
×
  • Create New...