Jump to content
SAU Community

Rb Custom Stroker Pistons

GTRNUR
 Share

Recommended Posts

GTRNUR Grand Master

GTRNUR

Posted
Posted

Hi all,

I have a set of CP 87mm custom design pistons that are setup for use in a stroker motor. There are a lot of possabilities with these pistons. A few of these that are easy to achieve would be:

RB28 stroker:

77.7mm stroke, Rb26 Stock length 121.5mm rods, 1mm head gasket, 8.11:1cr (64cc stock head), 8.34:1cr (62cc shaved head)

Brian Crowler RB28 Stroker:

79mm stroke crank, Rb26 Stock length 121.5mm rods, 1.6mm head gasket, 8.23:1cr (64cc stock head), 8.46:1cr (62cc shaved head) (0.65mm positive deck height)

RB30 options:

RB30 cranks up to 93mm can also be supported with a stock length rod and a zero deck height. 94 would be a 0.5mm positve deck.

If you wanted to do something with offset grinding an RB30 crank and using 19mm GTiR sized journals, and 87mm stroke with a 6.125" rod would also fit nicely. I can make a crank to suit if this is something that interest you. SR20 rod journals remove about 50-75 grams of recipricating mass from each rod, and about 50 grams from the crank.

Full specs of the pistons are:

87mm bore

28mm compression height (32 is standard)

5cc RB26 Dome profile

21mm wrist pins

5.5mm crown thickness

These were a custom piston I had made for an early design of my open deck engine, but were never used due to a design change. The only time the packaging has been opend has been to photograph them.

Cost me $1500 to have made.

Will sell for $950 delivered in Australia. Also open to offers for swaps.

PM me if you need more detail.

Ph: 0434 147 478

Cheers,

Ian

post-26553-0-23488200-1323069134_thumb.jpg

post-26553-0-25088400-1323069144_thumb.jpg

Link to comment
Share on other sites

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

    • Nightmare_mistress_R33
      CD009 RB Conversion

      By Nightmare_mistress_R33 · Posted

      I am currently going this route. I am curious how much horse power you put behind the cut bell housing? Collins was telling me I am going to crack it and bluh bluh bluh. Because I didn’t buy the custom fly wheel from him. I am looking for somewhere around like 500 hp
    • Beanie
      Hello from the UK

      By Beanie · Posted

      Forgot to mention that these are the before pics when I first got it!
    • Beanie
      Hello from the UK

      By Beanie · Posted

      Thanks @PranK for the updated member status, much appreciated! 👍🏼 Now, about those pics… Unfortunately I could only find ones that I took in the dark. I was soon to discover that underneath it wasn’t in the best shape, but it was mine and that’s all I cared about at the time 😆
    • r32-25t
      PRP RB26 cast block + head prototype running

      By r32-25t · Posted

      Buy one
    • GTSBoy
      A little PU bush story

      By GTSBoy · Posted

      Oh, and only having done this task yesterday, I've now driven the car ~60km since, and while it is hard to avoid placebo effect and confirmation bias, I reckon that some annoyances I had with the way the car has been behaving have improved. Which....kinda makes sense, I guess. If the bushes were really stiff and resisting rotation, they would have been contributing to the effective wheel rate. And if it was more so on one side (which it was, because one side was worse than the other) then.... you might imagine that the additional rate would be asymmetric, and potentially even different between compression and rebound. And so... the car has been twitchy at higher speeds - like freeway on ramps. It really shouldn't be. The wheel alignment is good and there are no (other) known problems elsewhere in the suspension. But at 90-100 on a long sweeping ramp, tiny steering wheel motions would make it feel like it wanted to rear steer. Quite nervous. At lower speeds it would heave about in a manner that it didn't use to. Didn't want to put power down, etc etc. Now...seems to behave better. Am going to have to concentrate on the various corners where it has exhibited weirdness, on the rare occasions when I can get a decent run at them without Methanial getting in the way in his D-Max/Ranger/LDV Van/etc.
×
×
  • Create New...