Jump to content
SAU Community

Bathurst, RB30 bottom end? For RB26

IOWNU

By IOWNU,
in Engines & Forced Induction

 Share

Recommended Posts

IOWNU Grand Master

IOWNU

Posted
Posted

Hey guys,

Well I've think I've matured as a driver enough now to begin modifying my GTR, turbos, engine, intake. A couple of question about bottom ends?

I have been offered a bottom end that apparently is from one of those cars that used to race at Bathurst.....

Firstly.......is that sort of thing legal? What are the rules in relation to modifying a cars bottom end?

Secondly.......cost, how much should it cost? I have no idea. HOw can you verify that it is indeed one of those bottom ends?

Thirdly.....Would it be wise to purchase if it genuinely a bathurst bottom end?

Now alternatively, my performance mechanic suggested that I use a RB30 bottom end.....apparently that's illegal, but he said no one could find out unless they open the engine, as he said he would 'stamp' RB26 numbers on it? Whats goin on here? Anyone experimented with RB30 internals before?

Any info would be great guys......

Regards,

Ali

Link to comment
https://www.sau.com.au/forums/topic/77556-bathurst-rb30-bottom-end-for-rb26/
Share on other sites
Sydneykid Grand Master

Sydneykid

Posted
Posted

Do a search for RB30 details. There are plenty of ticks needed to fit on to a GTR, they are a 2wd block after all.

Bathurst RB26, N1 block, standard crank, forged rods (usually Carrillo) and forged pistons, so nothing special. They ran an external oil pump, so it may not have an internal pump. That's a pain on a road car. The engine is ~12 years old, the chances of it having its original components is pretty slim.

:)

Wazz Community Regular

Wazz

Posted
Posted

hmm dont know the rules for melbourne.. but rb26/30's arent illegal as far as i know

how ever 'restamping' a engine number or wat not.. is illegal

dont see why using an ex race block/bottom end would be illegal.. as i know of a A9X running a race prepped engine on the street.. (hardly gets driven cause its immaculate)

one thing to be carefull of is.. very that is it a genuine race prepped block maybe get the engine number and go down to holden and see if they can find any info on the block to see weather it really is genuine or not

Warrick

Sydneykid Grand Master

Sydneykid

Posted
Posted
how ever 'restamping' a engine number or wat not.. is illegal

When you buy a new engine block from Nissan/Holden it comes unstamped ie; no engine number. The idea being that you are buyinga new block to replace the old one which is broken. So you stamp the old block's engine number on the new block.:)

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

    • PranK
      New lightweight, square wheel/tyre combo for the E90

      By PranK · Posted

      Nah, nothing formal, just open track days. Mostly small and tight circuits but I would like to get back out to Eastern Creek at some stage.
    • Murray_Calavera
      New lightweight, square wheel/tyre combo for the E90

      By Murray_Calavera · Posted

      What type of track driving will you be doing?  Do you have a set of class rules you need to abide by that will limit your rim / tyre width?
    • PranK
      New lightweight, square wheel/tyre combo for the E90

      By PranK · Posted

      I've been reading a lot lately about unsprung weight and how beneficial it can be to reduce it for driving on the track, given my semi's only have another day or two in them I am throwing around the idea of some lighter wheels and a square set up. I have 265/35/19's and 245/40(?)/19 Federal 595's at the moment. The wheels and tyres are super heavy. I looked up my wheel weight online and got 14.5kg naked. Not sure if this was 8.5 (front) or 9 (rear) but that's a lot. I have also been reading about the benefits of a square setup. Much better rotation and potentially less understeer.  When I throw these together I'm thinking about a 17x9 or 18x9 square (preferably under 10kgs per wheel) with 245 or 255's. I can get some cheap 17x8.5 BMW M Sport wheels, they weight 10.5 kg's each but at 8.5 wide could probably only get 245's on them? I know they come with 255's from factory but semi's are a bit chunkier. Otherwise it will be aftermarket wheels in a 9" width. Most of the other BMW wheels are heavy unless you pay a squillion dollars for some M wheels.  Although, the E46 M3 Style 67's could be good but I'd have to buy 2 sets to square them up.  My car has a tickle over 400hp and about to put an LSD in also, is 245 a little thin for a square setup? It kinda feels that way to me. Also, is there any tangible benefit to having 18's over 17's? Is the footprint demonstrably bigger? From those of you who went to light(er) wheels after heavy buggers, did you notice it much?
    • GTSBoy
      RB26dett R33 gtst swap

      By GTSBoy · Posted

      Start with the R32 GTR wiring diagram. The ECU is essentially the same, so the pinouts are good. The details around ECCS relays, etc might differ a little bit, but the reality is that you need to get ignition power to kick the ECU so it powers up the ECCS relay which brings the rest of the ECU up. This also gives power to the other circuits that are needed to make the engine run, like the ignition coils, etc. All of this is visible on the R32 diagram and should give you a strong guide, even if it's not quite the same as the R33. As to specifics - I'm pretty sure no-one can help you from afar, as there is no way to know what mistake or omission has been made in connecting stuff up. It always turns out to be "LOL, I shorted something and an entire wire vanished out of the loom", or "We never connected X or Y main connector", or "shit, you mean I need to have that fuse installed?".
    • r33.antwone
      RB26dett R33 gtst swap

      By r33.antwone · Posted

      hello wanted some insight on what my problem could be so i swapped a RB26DETT into my r33 gtst used a R33 GTR engine harness and im using a haltech platinum pro. The car cranks but no start the ecu isn’t getting any power now im trying to find out why i cant seem to find any schematics  or diagram for the engine harness for the r33 gtr anything helps thank you.
×
×
  • Create New...