Jump to content
SAU Community

Recommended Posts

Hi everyone!

Just need some help from all the tech heads out there.

I have recently had my RB26 block sonic tested and I have been informed that the walls of the block are too thin. They recommend me purchase another standard block. However I have a RB30 block and I am interested in using this instead.

I heard it’s a bit of a headache trying to put the RB26 head / RB30 block set up into a R32 GTR. Is this true? Can someone explain the necessary modifications involved in this set up.

Thanks.

Link to comment
https://www.sau.com.au/forums/topic/63649-rb2630-in-32gtr/
Share on other sites

Hi everyone!

Just need some help from all the tech heads out there.

I have recently had my RB26 block sonic tested and I have been informed that the walls of the block are too thin. They recommend me purchase another standard block. However I have a RB30 block and I am interested in using this instead.

I heard it’s a bit of a headache trying to put the RB26 head / RB30 block set up into a R32 GTR. Is this true? Can someone explain the necessary modifications involved in this set up.  

Thanks.

the rb26head is a straight bolt on to the rb30 bottom end all you have to do is put another timing tensioner on the rb30 bottom end. if you didnt want to do it yourself sub-zero have done 100s of them(55717077)

Link to comment
https://www.sau.com.au/forums/topic/63649-rb2630-in-32gtr/#findComment-1196231
Share on other sites

ok...the problem is the RB30 block is not wide enough for the RB26 sump...therefore you need to make an adapter plate up....But the diff will then be a little lower also the sump to gearbox bolts dont line up and the driveshaft from the transfer case has a diffrent angle running to the front diff so the recess that is cast into the bell housing may be an issue

Link to comment
https://www.sau.com.au/forums/topic/63649-rb2630-in-32gtr/#findComment-1196397
Share on other sites

Hi everyone!

Just need some help from all the tech heads out there.

I have recently had my RB26 block sonic tested and I have been informed that the walls of the block are too thin. They recommend me purchase another standard block. However I have a RB30 block and I am interested in using this instead.

I heard it’s a bit of a headache trying to put the RB26 head / RB30 block set up into a R32 GTR. Is this true? Can someone explain the necessary modifications involved in this set up.  

Thanks.

Your best bet it to get your rb26 block fully sleeved around $700 to get back to std bore size (ready to bolt new pistons in) and the sleeve material is twice as strong as the block material for the same wall thinkness . Not hard to do and is good for 1000hp plus if dont properly (os giken 3 litre is sleeved rb26 block with a large spacer basically)

my mates run a sleeved block in his r32 gtr now and i did alot of engines like this when i was in the industry :D

Link to comment
https://www.sau.com.au/forums/topic/63649-rb2630-in-32gtr/#findComment-1197228
Share on other sites

Your best bet it to get your rb26 block fully sleeved around $700 to get back to std bore size (ready to bolt new pistons in) and the sleeve material is twice as strong as the block material for the same wall thinkness . Not hard to do and is good for 1000hp plus if dont properly (os giken 3 litre is sleeved rb26 block with a large spacer basically)

my mates run a sleeved block in his r32 gtr now and i did alot of engines like this when i was in the industry :P

Agreed, better than the RB30 route! that is what I'd do if in your situation.

Link to comment
https://www.sau.com.au/forums/topic/63649-rb2630-in-32gtr/#findComment-1197848
Share on other sites

Hi everyone!

Thanks for all your replies.

I took pnblights advice and I spoke to the engine builder about it. He said for me to re-sleeve it will cost about $130 a bore, so for 6 be $780. For that sort of price I might as well look for another standard block.

Now this is what I can’t understand. Previously my block was bored out to fit 87.5mm pistons and I have access to 88mm pistons. He said if he bored to fit these pistons the wall will be too thin. But on many occasions I have seen HKS 88mm pistons on various GTR’s. One such example is Deans (Ultimate Performance Imports) R33 GTR. So why is my block an exception? I realize that all blocks are different but can this be done?

Link to comment
https://www.sau.com.au/forums/topic/63649-rb2630-in-32gtr/#findComment-1197995
Share on other sites

Hi everyone!

Thanks for all your replies.  

I took pnblights advice and I spoke to the engine builder about it. He said for me to re-sleeve it will cost about $130 a bore, so for 6 be $780. For that sort of price I might as well look for another standard block.  

Now this is what I can’t understand. Previously my block was bored out to fit 87.5mm pistons and I have access to 88mm pistons. He said if he bored to fit these pistons the wall will be too thin. But on many occasions I have seen HKS 88mm pistons on various GTR’s. One such example is Deans (Ultimate Performance Imports) R33 GTR. So why is my block an exception? I realize that all blocks are different but can this be done?

the only other thing i would take into consideration is even if you get another block you will still have to bore and hone it so the cost will be more than just another block and you might be any better off

sleeved block $780 as your quote

(this block will have good strength and can be rebored down the road etc)

new block $1200-1500(i'm guessing) plus boring and honing $~400

you will be looking at twice the cost at a guess and the block will not be as strong

just my opinion

cheers

Link to comment
https://www.sau.com.au/forums/topic/63649-rb2630-in-32gtr/#findComment-1198110
Share on other sites

if you do a search for my name you will find a whole heap of info on the rb26/30, i also sell the adaptor plate and there is a far bit of work involved but if you are interested PM and i can tell you how my adapter plate works!!!

Link to comment
https://www.sau.com.au/forums/topic/63649-rb2630-in-32gtr/#findComment-1198194
Share on other sites

the only other thing i would take into consideration is even if you get another block you will still have to bore and hone it so the cost will be more than just another block and you might be any better off

sleeved block $780 as your quote

(this block will have good strength and can be rebored down the road etc)

new block $1200-1500(i'm guessing) plus boring and honing $~400

you will be looking at twice the cost at a guess and the block will not be as strong  

just my opinion

cheers

YEA pnblight, you talked some sense into me. Ill call my engine builder tomorrow. I hope his workmanship at sleeving is good.

Thanks for your advice

Link to comment
https://www.sau.com.au/forums/topic/63649-rb2630-in-32gtr/#findComment-1198212
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


  • Similar Content

  • Latest Posts

    • Maybe they'll look to do a bunch of presales to help inject some cash fast for their financial issues...
    • Does it also misfire equally when revving?   Josh is very correct in what you should do. The coilpack harness wiring loom itself is a known problem due to its age and the number of heat cycles it has gone through. Throwing parts at a vehicle to diagnose the issue isn't a smart or good way to do it. Secondly, you may have a bad coil pack, you pop replacements in, they fix that issue, but messing with the harness breaks it, so the issue persists. So now you think "well it wasn't the coil packs" and have to continue chasing your tail, potentially swapping back in your shit coil packs and returning the good ones (yes, I've seen people do this because 'it wasn't the problem' and they want to save money). And suddenly, you've got two issues with the same symptoms...   Diagnose, don't use the spare parts shotgun.
    • Well the articals keep saying a Q50s (Skyline in Japan) with a new Manual gearbox. I like the talk about the new looks with the round tail lights. I hope they bring back the retro look like they did with the Z
    • Off the back of feedback we have decided to mix up this next Motorkhana at Avalon to have some targeted skills practice for beginners to advanced. Saturday 6th September 2025 8:30am Capped 26 entries Standard Entry Fee: $89 Members Entry Fee: $55 (SAU Victoria Only) Entries Close: Friday 5th February  Where: 55 beach road Avalon. https://maps.app.goo.gl/HNUE3EuNue3sJxh38 Entries: Limited to 26 entrants (Passengers allowed over the age of 14 with a signed disclaimer and same safety gear) Disclaimer: Download  Please electronically sign and email to [email protected] or print and hand in and Driver Sign In. To compete in this event you will require A valid  AASA General Speed licence or (Day license via the AASA Website for $50) MA Licenses are no longer accepted by AASA https://aasa.com.au/  A helmet, long sleeve clothing and a 1KG mounted fire extinguisher recommended (But not Mandatory). Further details within Supp Regs on the enty link. Entry Link > https://www.sauvic.com.au/entry/deca/20250906 You can bring and have a passenger in the car but they need to comply to the same safety and clothing as driver. Bring your car and get to battle others, win, lose or draw. I can guarantee you will have lots of fun. Any questions email [email protected] Entry List:
    • Wanna rewrite all of that in, say, 2 or 3 separate sentences, so that we can read it?
×
×
  • Create New...