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! (zoom@expresspublications.com.au) 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

    • niZmO_Man
      Borg Warner EFR Series Turbo's V 2.0

      By niZmO_Man · Posted

      Not that I know from experience, but in theory you'd want your gate spring to be as close to target pressure as possible, so you'd go with the higher gate spring?
    • Borci88
      Borg Warner EFR Series Turbo's V 2.0

      By Borci88 · Posted

      Before I commit to it as I already have the wastegate off the car, would you change it to the 9psi spring instead of the 12, or whack it back on now and try your suggestion?   Edit: Actually I might just swap the spring and see what the logs say after another few pulls, as we know it's still spiking without the Mac valve in the picture so I need more data without the Mac valve trying to combat the issue.
    • Murray_Calavera
      Steps to DIY sanding car back ready for respray....

      By Murray_Calavera · Posted

      Sounds good Hmm suppose the main thing is, how much do you care about this car? The filler doesn't make for a very good water barrier lol. If there was a tiny little bit of rust forming now, that in 3 to 5 years time becomes obvious under the paint (starts to bubble up), would it bother you? 
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      I already have the ability to datalog the voltage... what I can't do is correlate it to what the gauge is showing when I'm looking at the data at a later date. Or something like this. Except getting the oil to 125C+ involves me going 200+kmh at the track so you can imagine this is a little tricky unless I do something like note what the voltage is when I am at the top of 5th gear so I have a point to reference on. Drove car today. O2 still reading richer because hopefully not a leak instead of massive restriction I've introduced. Car really doesn't sound like a LS. It's quite strange. Pulled a bit of fuel out up top. This does potentially explain why my spark plugs looked like the car was running pretty over-rich. If I was tuning it to a ~12.7 which in reality was far richer than that in the past. It will be handy to have the dyno WB to compare my WB to to compare notes that's for sure. At this point I'm happy to just sit in the passenger seat and tune the thing given I've got about 7 million hours on the platform lol.
    • Chocolate Cheesecake.
      Infiniti Q60 Navigation Update

      By Chocolate Cheesecake. · Posted

      Yeah I understand you have to pay for an updated map or subscription service or something. But I can't even find a current map for Australia. My map is dated 2017, but didn't this car version still sell in Australia until 2021?   Also, just as an aside, the navigation system warns you of traffic incidences ahead.....why would they include that on a map they knew is not receiving live information. I am forever going to be warned of an incident that probably existed for 30 minutes 8 years ago.
×
×
  • Create New...