[New RB26/30 9:1CR 87mm CP Forged Pistons (Wrong size for my car)]

Selling a brand new set of 9:1 CR CP Forged pistons to suit an RB26/30 with 87mm bore (1mm oversize) - The pistons cost $1,569inc GST from Spool.

Unfortunately the RB30 block I bought had been rebuilt and decked before (possibly twice) and the pistons I bought are 40 thou (1MM) over deck height. 

These pistons fit any RB30 block with an RB26 head. To salvage my build I have had to sell these and order another 87mm set from Spool with a 1mm higher pin height 

There are small scratches on the inside of the piston where you fit the circlips which does not impact the piston.

Sale comes with:

6 x CP Forged pistons as in the spec sheet

6 x Standard Piston Pins

12 x Cir-clips

You will need to order 6 sets of rings from Spool with the part number 21-PVH08700 at about $45 a set.

I am chasing $750 plus postage which is a very reasonable amount considering the pistons minus the rings would be $1,156ex GST.

Please reply or email [email protected]

[New RB26/30 9:1CR 87mm CP Forged Pistons (Wrong size for my car)]

Selling a brand new set of 9:1 CR CP Forged pistons to suit an RB26/30 with 87mm bore (1mm oversize) - The pistons cost $1,569inc GST from Spool.

Unfortunately the RB30 block I bought had been rebuilt and decked before (possibly twice) and the pistons I bought are 40 thou (1MM) over deck height. 

These pistons fit any RB30 block with an RB26 head. To salvage my build I have had to sell these and order another 87mm set from Spool with a 1mm higher pin height :(

There are small scratches on the inside of the piston where you fit the circlips which does not impact the piston.

Sale comes with:

6 x CP Forged pistons as in the spec sheet

6 x Standard Piston Pins

12 x Cir-clips

You will need to order 6 sets of rings from Spool with the part number 21-PVH08700 at about $45 a set.

I am chasing $750 plus postage which is a very reasonable amount considering the pistons minus the rings would be $1,156ex GST.

Please reply or email [email protected]

[RB26 Poly Quad valve setup + porting]

7 hours ago, Old man 32 GTR said:

this is my cam specs and my car feels strong down low, and really strong up top, nice idle and comes on nice, the 68/70 isn’t a small turbo, but isn’t big either. From about 2500rpm, if you roll on the throttle it will build boost fairly quick. 

Thanks very much for the cam specs. If you don't mind me asking - what power are you putting out with these?

 

[RB26 Poly Quad valve setup + porting]

Thanks for the reply lads! Yeah it will be awesome - It's getting restoration work + strengthening done atm.

Yep that's the one GTS boy.. I wrote my first post incorrectly.

There doesn't seem to be a huge amount of info around but I felt it must be more common than I thought for the machine shop to flat out recommend it straight up.

I can see how it would help if it creates a vacuum but it looks like the port jobs need to also be done around it to make it work?

032 JET - Thanks for the info! For the power I am looking to dial - do you think the 278 would be better for my scenario?

I will definitely re-think my turbo choice! I want to dial high power but really try and keep my low down power and minimal lag.

[RB26 Poly Quad valve setup + porting]

7 minutes ago, KiwiRS4T said:

You'll be doing well to get 700hp from that turbo. Have you already bought it or can you get something better?

Haven’t bought it yet was aiming to peak it with a large rear housing. Got everything else pretty much.

[RB26 Poly Quad valve setup + porting]

Building a forged RB26/30 at the moment with a brand new RB26 head and I am aiming a reliable 700hp in a Datsun 240z.

I am booked in for TAW Performance to get porting done plus machine work for what I planned to be 1mm oversize Tomei Valves + supporting parts.

They suggested running "Poly Quad" arrangement for better low down power and torque (intake standard size and exhaust 1mm oversize for example) which creates a swirl effect.

Has anyone had any experience with different sized valves and can share their experiences?

Supporting mods:

RB30 Block, CP 9:1 forged pistons, Spool i-beam rods, RB26 GTR bearings, ARP mains, Nitto pump and collar, ARP 12mm GTR head studs, RIPS RB26 intake, 6Boost manifold + GT35r.

Thanks!