Jump to content
SAU Community

Recommended Posts

R32 GTST rb25 neo rebuild

So thought I would start a build thread for my 1993 nissan skyline r32 gtst.

As the Vic regulars may know, having owned her for 10yrs, the mighty rb20 had never let me down. Always waving the rb20 propaganda flag!! 
Previously running a hks2530 with all supporting mods, the little '20 was putting out a respectable 230kw atw in its daily trim.

Until recently, with 250,000km on the clock, the car started to feel a bit hesitant. A compression test/leak down test revealed a low-compression/leaking cylinder :(
So the first step was to pull off the head in the hopes it was a valve issue...

Off with your head....

IMG_6930.JPG

Sent off the head to be inspected but it showed up all fine??? Confused...so my options were to either bolt it all back together & hope for the best, or start fiddling with the rb20 block...
Decided that the easiest option would be to retire the long-serving rb20 & drop in a rb25 NEO and be on my merry way. RIP rb20 :(

Having found & purchased a wrecker rb25 NEO, I felt it would be best to inspect & freshen up before fitting into the r32...

IMG_7171.JPG

 

Sent the Head & Block off to be inspected & with any gamble in buying second-hand motors, the news wasnt good...
Number 1 conrod bearing had spun & caused a bit of damage to the crank. Oil pump drive on the crank nose was also damaged which would indicate the oil pump gears could be damaged as well...

IMG_7304.JPGIMG_7306.JPGIMG_7307.JPGIMG_7308.JPG

Fortunately the seller of the engine was a top-bloke & offered a partial refund as I was still committed to rebuild the engine!

So the engine build continues with a freshen-up of the Head with 'Performance Spring' valve springs & retainers on their way from QLD...
IMG_7429.JPGIMG_7430.JPG

 

& for the block - new goodies have been purchased.

For the oil pump, I have opted for Lewis Engines oil pump spline gears - controversial? mysterious? - lets see what happens :)
http://www.lewisengines.com.au/new-product-rb-spline-drive-gearsets-and-drive-kits/

and for the block, my arm was twisted into buying CP forged pistons & Manley rods
IMG_7499.JPG

IMG_7500.JPGIMG_7501.JPG

So this is where we land today - a couple of other things happening in the background - rb25 gearbox rebuild & Nismo LSD - but will update once I receive updates myself.

Wiring, on the hand, is something i'm putting off at this stage as its not as simple as a r33 rb25 drop-in.
The rb20 loom is out & I have a Neo loom to mix/match/hack into...or I might just opt for a Wiring Specialties new loom & save the headache?
http://www.wiringspecialties.com/rb25-neo-wiring-harness-r32-gts/

IMG_7288.JPG

Only time will tell, watch this space & thanks for reading :)

  • Like 7
Link to comment
https://www.sau.com.au/forums/topic/467808-r32-gtst-rb25-neo-rebuild/
Share on other sites

4 hours ago, JH32 said:

Nice one! 

You're in Perth yeah? Or back in Melb? Who's doing the engine and head work?

I had a short stint in Perth where I moved myself & the car across but I've since returned back to Melbourne :)

IMG_3746.JPG

======

Good News! My Nismo 1.5way LSD has arrived from Japan. Apparently the last one in stock, a quick-turn around thanks to Jesse Streeter!

IMG_7516.JPG

Full engine gasket kit on its way from Kudos Motorsports & hopefully will get an update on the rb25 gearbox rebuild tomorrow :)

Nice 32!

 

I was contemplating a RB25NEO conversion into my RB20 cefiro.

I was planning to keep my ecu (nistune) loom etc, and run a msd window switch for the vct, 

As far as wiring, pretty sure most things are like for like, apart from the CAS, which is reversed, Pretty sure I found instructions on SAU :)

11 hours ago, 32_love said:

If you don't mind me asking, what front lip is that? Looks very shmick

no idea what type of lip it is, I picked it up from a friend who imported his car with the lip. It's quite unique as its shaped specifically for the gtst front-bar :)

IMG_3364.JPG

11 hours ago, CEF33Y said:

Nice 32!

 

I was contemplating a RB25NEO conversion into my RB20 cefiro.

I was planning to keep my ecu (nistune) loom etc, and run a msd window switch for the vct, 

As far as wiring, pretty sure most things are like for like, apart from the CAS, which is reversed, Pretty sure I found instructions on SAU :)

only like-for-like with a r33 rb25 engine. Unfortunately the NEO uses different body plugs so a lot of chopping & swapping is required.
I'll dive into it once Im ready to start wiring in the engine :)

Ahhhh, just the thread I was looking for!

I'm starting this same conversion over the holidays; engine, trans, ecu/loom... the whole she-bang!

I'll be keeping my eyes peeled for this thread. Best of luck with the conversion!

  • Like 1
  • 2 months later...

okay things have been a bit quiet in here - but lots of parts have been ordered over the Christmas break.

I am proud to share my latest purchase from GCG Turbochargers - A Garrett GTX3071r Gen2 T3 internal wastegate 0.82 low-mount RB setup.
With the GenII only released 2 months ago this is the first low-mount RB setup to pass through GCG Turbochargers & onto me :D

Big shout-out to GCG Turbochargers for responding to my endless FB messages after hours & helping me choose the right setup for my application.
Not only that, but the turn-around from Order to Dispatch was a matter of weeks when other distributors were quoting 3 month lead-times.
In addition,with GCG Turbochargers expertise in building turbos, they added a few extra tweaks to the build to aid boost control & overall flow.

GCG Turbochargers supplied in a RB25 low-mount kit; with all gaskets, bolts, studs, manifold spacer, braided lines, actuator, extra cheese - hold the mayo.
And to top it off, they been kind enough to send through some build photos :D

16491449_1261916157207078_627300090_o.jpg

16466696_1261915563873804_1715842685_o.jpg

16465988_1261915997207094_565881718_o.jpg

And so the r32 build continues!

Watch this space :D 

  • Like 2
  • 1 month later...

okay - a small update - parts have finally arrived - my box of goodies :D

58c13b8694518_IMG_88601.thumb.JPG.bd0348c48e8a592fd3d75b6daae37b27.JPG

NPC clutch - lookin fresh
58c13b8d4d3e7_IMG_88611.thumb.JPG.28aa5a6940f1a38b4860bf683b476374.JPG

Performance Springs all lined up & ready for assembly!
58c13b7a2e4ba_IMG_88581.thumb.JPG.44ff157ac25715ce3fa5ebe1a61c9d48.JPG

Neo head machined & assembled - ready for the Block!
58c13b7f47377_IMG_88591.thumb.JPG.0f82d82e0d14669d0726e3c8f5694ddd.JPG

A winning combination - CP forged pistons & Manley rods...
58c13b63adb2c_IMG_88571.thumb.JPG.4b16e0fecf32442b2f71a0503f8dde78.JPG

Spool oil pump spline gear fitted & crank sent off to be balanced....
58c13deb0a5db_IMG_86101.thumb.JPG.95283de9939f3b1eae450deb5aa7038c.JPG58c13c4ccd3bd_IMG_88621.thumb.JPG.4b1b541c8b2d08bfd9165337eea91b2e.JPG

The GCG turbo arrived & looking shmick! Quite large in comparison to my old hks2530
58c14581bd565_foto_no_exif(1).thumb.jpg.f5938ecf539d6cdef76ac0694d9cdc41.jpg

 

& as i wait for my engine to come together, the turbo has found itself on the coffee table for the time-being :P
foto_no_exif.thumb.jpg.30846db23a1721e62a2bf63eedf89ec1.jpg

  • Like 5

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

    • So stock ECU does not like anything above 10 psi?  That Nistune one is just for "try" if it will be any different, I know it need to be tune for that. I know but YOU may know about these problem but i/we dont. They few little Skylines here let alone people who know anything about tham so that is why iam asking here  
    • So now we have a radiator with no attachments whatsoever. It lifts up with a particularly tight spot between the drivers side air box mount and the lower radiator outlet, but if you've got this far you will sort that too. This is the lower mounts with the rad out so you can see where the rubber bushes go, it is a straight shot upwards Done! Assembly is the reverse of disassembly, with blood less likely to be shed.
    • Right, onto the second last trick. The Air Con condenser is mounted to the front of the radiator and stays in the car when the radiator is removed. There are 2x 10mm headed self tappers holding the top of the condenser to the radiator, remove those The bottom of the condenser is attached to the radiator with clips. You need to lift the condenser out of those clips and clear (up, then forward). f**ked if  could work out how to do that last bit with the front bumper on. I hope you can, and you share the trick.  Bumper removal probably deserves its own thread one day once I've recovered the will to live, but basically you need to remove the wheels, front inner guard liners (clips and 10mm headed bolts), the self tapper between the guard and the bumper at the rearmost point of the bumper (same as an R32 that bit), any remaining clips at the top/front of the grill, an absolute bastard design with a plate that holds the top of the bumper above the headlight each side (only 1 bolt which is tricky to get to, but the plate catches 2 places on the bumper and must be removed....carefully!) and push clips between the bumper and guard under the headlight. If you've done all that you will be faced with wiring for the fog lights on both sides and in ADM Q50 RS at least, 4 nasty tight plugs on the driver's side for the ADAS stuff. So, the clips at the bottom look like this on drivers side (looking from the front) And on the passenger side (also from the front), you can see this one is already out Clearance on both of these are super tight; the condenser needs to move up but the upper rad support mount prevents that, and the radiator can't move down far because it is (rubber) mounted. Once you achieve the impossible and drop the condenser off those mounts so it does not stop the rad moving, you are good to go
    • OK, next the shroud needs to come off and there are a couple of tricks. Firstly, there is a loom from near the passenger side headlight to the fans, coolant temp sensor etc and there is no plug to undo.  In my case I was OK to leave the shroud on top of the engine so I just undid the passenger side fan plug and about 10 of the clips which gave enough free wire to put it aside. The fan plugs were super tight, the trick I used was a small falt screwdriver to push down on the release tab, then a larger flat screwdriver to lever the plug out of the fan unit....be careful with how much force you apply! If you need to remove the shroud altogether for some reason you will have to deal with all the plugs (tight) and clips (brittle)....good luck. I removed all of the clips and replaced them with cable ties that I will just cut next time. Also, in the Red Sport / 400R at least, the intake heat exchanger reservoir hose is bolted to the shroud in 2 places with 10mm headed bolts; so remove them (the hose stays in the car; no need to undo it at the t fittings down at the radiator lower mount. Once you've dealt with the HX hose and the wiring loom, there are 3x 10mm headed self tappers holding the top of the shroud to the radiator; remove those.   The shroud then lifts out of the bottom mounts where it sits on the radiator, up and onto the engine out of the way. Simples
    • Ok, disregard my “rate them” comment, sorry for my unrealistic input
×
×
  • Create New...