Jump to content
SAU Community

Rb25/30 Rb30det Vvt Internal Oil Control

psi

By psi,
in Engines & Forced Induction

 Share

Recommended Posts

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

hi guys im currently building a 400+kw rb25/30 retaining vct

my head is currently being machined and I need to know what the maximum diameter is that I can drill out the head oil drains?

I have a -12 headoil drain also and restrictors etc but I will be doing the above also, any info or feed bad muchly appreciated

Corey

I understand 10mm but haven't done it myself. You also have to relieve the tops of those holes and the other drains.
  • 5 months later...
  • Replies 169
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

fletch rb30
fletch rb30

33 and 34 vct activation is different. On 33 heads, the oil constantly feeds the front journal to lubricate it. The oil leaves the journal via the vct solenoid into the head. When the vct engages the

daisu
daisu

Just to get an idea of how it works, is this what is happening with the oil feed?

psi
psi

I've heard of a few plugs that refuse to play the game. I thought I would have that issue and got some brass just incase.. If you do break or mangle it, you will have to make a copy. Nice pics

Posted Images

Looney_Head Rising Star

Looney_Head

Posted
Posted

Hi, i know this has been asked but i haven't seen an answer to it, has anyone got the internal VCT feed working and controlling oil issues to the head on a track engine?

what feeds are people running to the head when not using an external VCT but the internal drill feed method?

sriver killer Proficient

sriver killer

Posted
Posted

Hi, i know this has been asked but i haven't seen an answer to it, has anyone got the internal VCT feed working and controlling oil issues to the head on a track engine?

what feeds are people running to the head when not using an external VCT but the internal drill feed method?

Ive never had this mod running tried it on two different engines with 1.5mm Restrictors and n1 oil pumps.

ended up doing the tried and proven method of external oil feed.

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

Hi, i know this has been asked but i haven't seen an answer to it, has anyone got the internal VCT feed working and controlling oil issues to the head on a track engine?

what feeds are people running to the head when not using an external VCT but the internal drill feed method?

I am not sure if the internal VCT feed method got past the great theory stage. I have seen a couple of people who have tried and failed - don't remember seeing anyone who has actually done it successfully. Anyway don't really see how it relates to oil control problems - you still need restrictors at least and with RB30s I would say you need sump breathers.
ScreamerNewbie Enthusiast

ScreamerNewbie

Posted
Posted

hey guys im deleting vct on my 25/30 still running hydraulic lifters though, iv removed and plugged the vct solenoid in the head, obviously the bottom of the head is welded (the vct feed area). and I have 2x 1.2mm oil restrictors is there anything else I need to do?

  • 3 months later...
Fantm 34 Explorer

Fantm 34

Posted
Posted

Hey I read on the Webbers guide page for oil feed mods and it says " R34 NEO heads can be ran without NVCS as there is a normal oil feed" Can anyone confirm this? Or do you think an external feed should still be done?

Cheers Chris

iruvyouskyrine Grand Master

iruvyouskyrine

Posted
Posted

Hey I read on the Webbers guide page for oil feed mods and it says " R34 NEO heads can be ran without NVCS as there is a normal oil feed" Can anyone confirm this? Or do you think an external feed should still be done?

Cheers Chris

Got a link to the guide you were reading?

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

Oh ok well I intend on keeping vct. But must have read it the wrong way. So I'll still need the external line. Thanx fellas

I'm not saying the internal feed won't work - just that people on this forum recently have tried and failed. If you look at Webber's site (link above) you'll find instructions on how he did it.
Fantm 34 Explorer

Fantm 34

Posted
Posted

Yea I didn't think u could do it internally. From what I read on webers I was under the impression u didn't have to run a external line, even if u wanted to keep vct as the neo operates a different way. But guess it can't so External it is. Thanks guys

  • 1 year later...
dave1200 Collaborator

dave1200

Posted
Posted

drilled from one feed to the other .. get the angle right or you could end up with oil where you dont want it

attachicon.gifphotos phone 001.jpg

picky of where I drilled between the first 2 (intake) cam journals

attachicon.gifphotos phone 004.jpg

Drilled and tapped the outer layer to take a bung

attachicon.gifphotos phone 009.jpg

Dummy fitted the bung to show what it looks like finished

attachicon.gifphotos phone 011.jpg

Head was then dissassembled for further mods before being cleaned an reassembled

Hope this helps people

Hey I realise I'm digging up an old post but can you (boost is good) or anybody else help with this mod to the neo head?

This is easy BUT how on earth to you prevent getting chips in the oil gallery below that will be spat through the motor in the future? You obviously can't get to the inside of that oil gallery easily so have you just ignored this? Can you take the plug out of the front and the ball bearing and spring etc and clean it out?

I just notice people talking about external feeds on Neo heads again in here, I can't understand why you'd go external if you can do a rock solid internal mod?

  • Like 1
Ben C34 Grand Master

Ben C34

Posted
Posted

Hey I realise I'm digging up an old post but can you (boost is good) or anybody else help with this mod to the neo head?

This is easy BUT how on earth to you prevent getting chips in the oil gallery below that will be spat through the motor in the future? You obviously can't get to the inside of that oil gallery easily so have you just ignored this? Can you take the plug out of the front and the ball bearing and spring etc and clean it out?

I just notice people talking about external feeds on Neo heads again in here, I can't understand why you'd go external if you can do a rock solid internal mod?

You drill it with the head off and blow it out.

  • 2 weeks later...
SilverECR33 Veteran

SilverECR33

Posted
Posted

absolutely brilliant. i was thinkin of doing this also with mine but there wasnt alot of people willing to try it back then and also time was an issue so i went with external. might have to re-visit this! less points of failure!.

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

    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      I feel I should re-iterate. The above picture is the only option available in the software and the blurb from HP Tuners I quoted earlier is the only way to add data to it and that's the description they offer as to how to figure it out. The only fields available is the blank box after (Input/ ) and the box right before = Output. Those are the only numbers that can be entered.
    • GTSBoy
      Mistakes were made, my R34 Story

      By GTSBoy · Posted

      No, your formula is arse backwards. Mine is totally different to yours, and is the one I said was bang on at 50 and 150. I'll put your data into Excel (actually it already is, chart it and fit a linear fit to it, aiming to make it evenly wrong across the whole span. But not now. Other things to do first.
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      God damnit. The only option I actually have in the software is the one that is screenshotted. I am glad that I at least got it right... for those two points. Would it actually change anything if I chose/used 80C and 120C as the two points instead? My brain wants to imagine the formula put into HPtuners would be the same equation, otherwise none of this makes sense to me, unless: 1) The formula you put into VCM Scanner/HPTuners is always linear 2) The two points/input pairs are only arbitrary to choose (as the documentation implies) IF the actual scaling of the sensor is linear. then 3) If the scaling is not linear, the two points you choose matter a great deal, because the formula will draw a line between those two points only.
    • GTSBoy
      Mistakes were made, my R34 Story

      By GTSBoy · Posted

      Nah, that is hella wrong. If I do a simple linear between 150°C (0.407v) and 50°C (2.98v) I get the formula Temperature = -38.8651*voltage + 165.8181 It is perfectly correct at 50 and 150, but it is as much as 20° out in the region of 110°C, because the actual data is significantly non-linear there. It is no more than 4° out down at the lowest temperatures, but is is seriously shit almost everywhere. I cannot believe that the instruction is to do a 2 point linear fit. I would say the method I used previously would have to be better.
    • GTSBoy
      DeAgostini 1/8 scale BNR32 Nissan Skyline GT-R Nismo

      By GTSBoy · Posted

      That's hilariously putrid!
×
×
  • Create New...