Jump to content
SAU Community

RB26 Head questions

GarettH

By GarettH,
in Engines & Forced Induction

 Share

Recommended Posts

GarettH Enthusiast

GarettH

Posted
Posted
RB26 Head questions

Hey guys, I have tried to do some research and I can not seem to find the right threads to answer my questions. I'm currently doing a rebuild on my RB26 head and have a few questions.

My current parts list I have is

Brian Crower single spring & titanium retainers,

Supertech valve guides,

Brian Crower +1MM Intake & +1MM Exhaust valves,

Kelford 280 10.5mm lift cams

And what I can not find is if it's acceptable to reuse the OEM Valve Keepers/Locks and what the OEM Camshaft Studs are rated to. Are these MUST have things when doing the head?

Link to comment
https://www.sau.com.au/forums/topic/468066-rb26-head-questions/
Share on other sites
Dale FZ1 Veteran

Dale FZ1

Posted
Posted

What collets does BC specify/recommend for their valves?  Are OEM compatible?  Check with your supplier.

Camshaft caps are held by bolts.  Any reason they won't work properly?  Are there even studs available?  The items being held only have rotary motion.  Not reciprocating, and there isn't the pressure of combustion trying to dislodge things.

If you establish a plan with your chosen engine builder things can potentially run smoothly as the parts are matched and fit for purpose.  There's been some very good discussion regarding RB26 cams/heads and what can be achieved with surprisingly mild cams combined with the right turbocharger system spec.

Dale FZ1 Veteran

Dale FZ1

Posted
Posted

I see Tomei does list studs.  The blurb generally indicates they are for fairly extreme lift and rpm eg 12mm lift, 10000rpm.

No real indication of what service this head is being put to.

I stand by comments regarding a discussion with the person chosen to build the thing.  Come up with a total combination fit for purpose.  "Maybe" these things are a useful/necessary item in OP's case.  Doubtful IMO though at a few hundred $$ not much in the overall scheme of a build.

33GTRV Mentor

33GTRV

Posted
Posted

Any particular reason why your going BC valves springs and retainers? For a fraction more you can get a full supertech valvetrain package and dual springs.

 

Also, whats the intended use for the car as those cams are not ideal for a street car

GarettH Enthusiast

GarettH

Posted
  • Author
Posted
Any particular reason why your going BC valves springs and retainers? For a fraction more you can get a full supertech valvetrain package and dual springs.
 
Also, whats the intended use for the car as those cams are not ideal for a street car


There's a few machine shops in Canada that have had good luck with Brian Crower springs/ retainers plus there spring specs like coil bind/seat height/spring pressure were closer matched to the Kelford springs that they recommend for there cams. And the stiffest single spring supertech offers is 60lbs which might be to soft. And trying to avoid dual springs and you need to bed the cams in with only 1 spring then add the 2nd spring later.

Cam choice is based off my turbo size and 900whp goal. Its a weekend street/drag car.
ido09s Mentor

ido09s

Posted
Posted

Just do the cam cap studs. I did, I just felt it was a bit of insurance and a small cost given what the rest of the engine was worth

Crower are very quick to respond to emails so shoot them off an email about the other stuff. I am sure they will answer in no time at all and give you an answer that will be 100% reliable ;)

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

    • GTSBoy
      Nissan fuga 450gt android screen

      By GTSBoy · Posted

      So, now all you need to do is connect the 2 or 3x 12v feeds into the unit to permanent 12v, ACC 12V and IGN 12V that you can find in the spot behind the stereo, and the earth, and then it will switch on with the car.
    • The king 2.0
      Nissan fuga 450gt android screen

      By The king 2.0 · Posted

      Yes then it will turn on but I want the car features to work  
    • GTSBoy
      NC MX5

      By GTSBoy · Posted

      My thought is if you were just moving it forward and the upstream geometry remained the same, then no difference at all. But because the current one has the filter direct into the AFM inlet, you effectively have the best chance of a completely symmetric air flow profile upstream, and in, the AFM, whilst the aftermarket inlet thingo has a (small, to be sure) bend between the filter and the AFM. That would bias the flow to the outside of the bend (downstream of the bend) which might well reduce the size of the signal seen by the AFM, for the same total flow rate. Having said that: If you're proposing to make your inlet look like a hybrid of your existing one and the aftermarket one, such that there is no bend where the filter is clamped on... then I say it will be just fine. If there is going to be such a bend, then, if you can align the insertion of the AFM blade such that it is at right angles to the plane of the bend, then there is a better than even chance that the centreline velocity where the blade is will remain more or less the same, and the velocity will just be a little faster to the outside of that, and just a little slower to the inside. **This is not professional investment advice and you should consult a suitably qualified ouija board, tea leaves or the intestines of a goat for more accurate prognostication.
    • pacman_1219
      Blue/grey smoke after idle

      By pacman_1219 · Posted

      Hi Tao, Thanks for your reply.  It's been a while and I managed to get the valve stem seals replaced with the head on the car.  Unfortunately this didn't solve my issue, the car still smokes a lot after idling (to be honest during idle you can see a bit of blue smoke from the exhaust), same after deceleration. I will try disconnecting the valve cover breathers, do I leave the PCV valve in? By engine oil drain pipe, do you mean the turbo oil drain?
    • GTSBoy
      Nissan fuga 450gt android screen

      By GTSBoy · Posted

      What about if you just give it direct 12v and earth?
×
×
  • Create New...