Jump to content
SAU Community

rb30 bottom end?

confak

By confak,
in Engines & Forced Induction

 Share

Recommended Posts

confak Enthusiast

confak

Posted
Posted

Does an rb30 bottom end with rb30 crank bolt straight onto an rb25 head?

Im thinkink of strengthening my bootom end as i am about to put a larger turbo in my car.

Does anyone have some feedback on doing this and also is a ihi apexi rx6 turbo a good upgrade for a gts. I can get a brand new one pretty cheap!!

Link to comment
https://www.sau.com.au/forums/topic/7267-rb30-bottom-end/
Share on other sites
GTS-t VSPEC Grand Master

GTS-t VSPEC

Posted
Posted

confak,

I'm pretty sure that it does bolt straight on, but that the oil and water galleries need to be moved. I'm sure someone out there knows for sure. The RB30 won't strenthen the bottom end just by putting it on, you'll have to look at doing things to the crank, pistons and conrods to make it tough. The extra 1/2 litre will make a larger turbo more responsive though.

Remember the RB30 was only put into shit cars, VL Turbo etc, so I can't believe that the bottom end will be too stronger, but I haven't tried it.

See'ya

:burnout:

Link to comment
https://www.sau.com.au/forums/topic/7267-rb30-bottom-end/#findComment-107052
Share on other sites
SteveL Mentor

SteveL

Posted
Posted
Originally posted by GTS-t VSPEC

Remember the RB30 was only put into shit cars, VL Turbo etc, so I can't believe that the bottom end will be too stronger, but I haven't tried it.

[cough] say what ?!? - the RB30 is used in Oz spec R31 Skylines and Nissan MQ Patrol's. Holden bought the RB30 to put in the VL when they realised the 202 (read: boat anchor) couldn't cut it with unleaded fuel. The bottom end of the RB30 is as strong as any of the RB series.

As for the RB25 head, the non-VCT head bolts straight to the RB30 block without mods, but the VCT head requires oil gallery mods.

Link to comment
https://www.sau.com.au/forums/topic/7267-rb30-bottom-end/#findComment-107174
Share on other sites
slip Mentor

slip

Posted
Posted

only put into shit cars eh. do i detect someone thats been chopped by VL turbos?

R31 = shit car apparently.

SteveL is correct about the non VCT head. This head is found on R32 RB25DE engines (possibly other engines but I dont know)

RB30 bottom end strength: from what i've read the standard bottom end is used regularly in larger hp applications.

Link to comment
https://www.sau.com.au/forums/topic/7267-rb30-bottom-end/#findComment-107207
Share on other sites
blind_elk Grand Master

blind_elk

Posted
Posted

As well as bolting the head on, you need to modify the cambelt idler / tensioner, and you need to modify the ignition system (RB25 runs coil packs). And you need a R33 ECU to run the coil packs.

email the boys at Zoom! ([email protected]) and ask them which issue covered this conversion.

Link to comment
https://www.sau.com.au/forums/topic/7267-rb30-bottom-end/#findComment-107328
Share on other sites
predator Grand Master

predator

Posted
Posted

Now we've started a stupid argument...

Anybody done 400,000km in their RB25 yet ? Hmmmm...when u do let me know, but there are still plenty of R31's driving around that have done that many km using an RB30 engine.

There is a guy on the www.r31skylineclub.com who has a 323kw/rw RB30 turbo (its actually being sold now for 13k - see http://nissanking.cjb.net/).

You might want to check out the r31forums there for some advice, as there are plenty of people who've put Turbo top ends on their RB30's

Link to comment
https://www.sau.com.au/forums/topic/7267-rb30-bottom-end/#findComment-108715
Share on other sites
meggala Grand Master

meggala

Posted
Posted

ok from the research Ihave done.

unless your going for mega power forget the rb 25/30 unless you can do all the work your self.

the rb26 crank and rods fit in the rb25 and get some forged pistons if you want to run serious boost or just use forgies on the stock bottom end.

con b4 you do any thing fit the rx6 turbo but make sure its suitable for the rb25 and yes they are very good turbos.

get a power fc z32 afm and bigger injectors merli is making 280 rwkw on a stock bottom end rb25 so you can and when it blows then fix it strong but it could last for ages. If tuned welkl and looked after

meggala

Link to comment
https://www.sau.com.au/forums/topic/7267-rb30-bottom-end/#findComment-108745
Share on other sites
  • 1 month later...
MegaGTS4 Proficient

MegaGTS4

Posted
Posted

ricknismo,

http://www.r31skylineclub.com/content/articles

Has a artical on a twincam conversion!

http://home.iprimus.com.au/cobra30/twincam.htm

Is another site detailing the conversion! Costs is also included in this one and it goes into much better explanation on using the non VCT head!

MEGA

Link to comment
https://www.sau.com.au/forums/topic/7267-rb30-bottom-end/#findComment-147590
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

    • GTSBoy
      Best place to order Authetic R32 Parts in Japan

      By GTSBoy · Posted

      I don't. I mean, mine's not a GTR, but it is a 32 with a lot of GTR stuff on it. But regardless, I typically buy from local suppliers. Getting stuff from Japan is seldom worth the pain. Buying from RHDJapan usually ends up in the final total of your basket being about double what you thought it would be, after all the bullshit fees and such are added on.
    • GTSBoy
      Ethanol Content Sensor - Always at 11%?

      By GTSBoy · Posted

      The hydrocarbon component of E10 can be shittier, and is in fact, shittier, than that used in normal 91RON fuel. That's because the octane boost provided by the ethanol allows them to use stuff that doesn't make the grade without the help. The 1c/L saving typically available on E10 is going to be massively overridden by the increased consumption caused by the ethanol and the crappier HC (ie the HCs will be less dense, meaning that there will definitely be less energy per unit volume than for more dense HCs). That is one of the reasons why P98 will return better fuel consumption than 91 does, even with the ignition timing completely fixed. There is more energy per unit volume because the HCs used in 98 are higher density than in the lawnmower fuel.
    • GTSBoy
      Blue slip

      By GTSBoy · Posted

      No, I'd suggest that that is the checklist for pneumatic/hydraulic adjustable systems. I would say, based on my years of reading and complying with Australian Standards and similar regulations, that the narrow interpretation of Clause 3.2 b would be the preferred/expected/intended one, by the author, and those using the standard. Wishful thinking need not apply.
    • GTSBoy
      Blue slip

      By GTSBoy · Posted

      Yes they do. For some maybe. But for those used the most by abusers, ie Skylines, the numbers are known. The stock eyebrow height for R32/3 Skylines is about 365/375mm or thereabouts. The minimum such heights are recorded in adjacent columns in the database.
    • soviet_merlin
      Ethanol Content Sensor - Always at 11%?

      By soviet_merlin · Posted

      Hmmm, interesting. Makes me wonder whether there is bias as well. It's the cheapest fuel, so it is used for all kinds of ill-maintained shitboxes which are bound to have issues regardless. Nicer cars tend to require higher octane rated fuel and can't use it anyway. FWIW, the official NSW E10 facts page is decent. 
×
×
  • Create New...