Jump to content
SAU Community

Recommended Posts

Hey,

So I've Finally got around to building a RB30DET for THE-31 which is my Aus Spec R31 TI Which was bought new back I'n the day by my grand parents and handed down.

So what i acutely want to know with MY set up (not someone else's) is what power figures i would be looking at? What are my Restrictions? And what are my weak points?

Here is what i have.

Block:

- RB30E

- Bored 40Thou Over

- ACL Forged Pistons

- ACL Rods

- ACL Big & Small Bearings

- ACL Gasket/Seal Kit

- N1 Oil Pump

- STD Crank

- STD Water Pump

- Underdriven Harmonic Balancer

- STD Sump

Head:

- RB25DET

- Ported & Polished

- STD Valves

- Stronger Springs

- STD Lifters

- Tomei Poncams 256 In/Ex

- Works Adj Cam Gears

- Greddy Copy Plenum

- Q45 Throttle Body

- Stainless Hi Mount

- HKS Waste Gate

- GT35/40 With AR.70/ M24 Front Housing

- Split Fire Coil Packs

- MLS 4 Layer Head Gasket

- VRS Gaskets/Seals

Fuel:

- Bosch 044

- 2L Surg Tank

- Denso 880CC Inj

Also Have:

- RB25DET Gear Box

- Apexi Powrer FC

- 3in Exhaust

- 3in Stainless Dump Pipe

- 600x300 Front Mount

- B&M Oil Cooler Kit

- STD Clutch Fan (Do Have EL Thermos But Took Them Out)

What Do You's think?

Thank you for any positive feed back.

  • Replies 51
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

By the looks of that youre pretty much sorted.

On thing I can pick is using the ctandard con-rods which will limit you to around 7000rpm and be safe

and the N1 oil pump measn you wont be able to do rev limiter skids

Apart from that and it isnt a biggie is that stainless high mount manifolds like to crack, and the cheap ones tent to have boost control issues.

As Zebra said, I think your limiting factor will be your pistons/rods (depending on how much boost and the fuel you want to run). IIRC the ACL "forged" pistons are not actually forged - I could very well be wrong, but I remember reading something along the lines of this in the RB30 thread...

Also to note - be wary of the condition of your valve-train (lifters mainly!). I may be having issues with my setup caused by ageing valvetrain or insufficient spring stiffness/seating pressure. At an absolute minimum get your head reco'd whilst its off and out of the car.

Edited by R32Abuser

Thanks For the input fella's.

Ive had the car running with the bottom end set up how it is for awhile now just With a RB30et running probably 200Rwkw. 

The piston are 8.5cr, the rods are ACL but not H-Beam or anything, i was fairly sure the pistons were forged??

The heads got new valves and stronger springs and was recod but the same can't be said for the lifters :/

Any idea of power figures?

Two things I will mention, I just got some Reimax gears for my N1 pump, for AU$430 delivered it would be something to think about doing.

Get a decent sump just for safetys sake, I run an ASR 6.5L baffled/gated item.

Power? Probably looking at ~350rwkw?

Do you have the VCT connected and running? Is that a Garrett 35/40 or a copy ( I thought Garrett woulkd be .63 rather than 70 exhaust).

Should make 350kw ok maybe more with a really good tune. 3.5 or 4in exhaust would be good.

What about a pic of your mint one owner car?!!

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

    • Haha luckily we don't have emissions, inspections, or any laws against power adders here. They only thing they somewhat keep an eye out for are ridiculously loud exhausts. 
    • Just wanted to pop in an update on my setup. The CD swap has been great, I love the mazworks housing for the overall simplicity. I ended up sealing my trans tunnel with a thin sheet of aluminum reused some of the holes on the trans tunnel, and laid some window sealing EPS foam around the edges. Works great, really quieted things down and sealed up the car.  As for the power comment. Right now I am also running about 650whp. with the way the bell housing is attached to the face of the transmission I have zero doubts it would be fine, mainly because the input shaft and main shaft bearings are seated into the bell housing adapter. This means the load is NOT on the bolts to maintain the power, rather into he casing of the bell housing; Yes the bolts are doing some work there, but with both shafts locked in zero worries.  End of the day, the Mazworks solution is the easiest and safest. no need to take your trans to a shop to get milled perfectly, it fits with minimal clearancing, and you can use all your existing clutch and flywheel.  Driving wise the CD has been great compared to the big box, I'll probably swap my final drive at some point. The serial 9 shifter is gooooood, my only qualm is how tight it is, it takes a fair bit to get use to, 5th and 6th are a bit eh/hard to find at times, but maybe I need re-adjusting, and I think my clutch master is very tired and needs a rebuild. 
    • If you are keen, have a look at my build thread. Car is for sale for the right money or straight swap for a F80 M3 LCI.
    • Welcome mate.  No point in over thinking it, buying any one of those cars you mentioned is not a smart or logical choice with the availability of many "better" (re price to performance) cars available to you.  The heart wants what the heart wants, buy whatever it leads you too.
    • Hey everyone! Im so grateful to be apart of this community and ill do my best to be apart of this. Firstly, i'm not disclosing my real name due to in real life circumstances surrounding my privacy and public image (sorry lol) Secondly, The only thing personal I am willing to share is that I'm from Sydney and a descendant of one of Sydneys largest mortgage firms. I got gifted my first ever car, a 2022 Porsche Cayenne and I love it to death. Ive been driving it for about 5 or 6 months now and honestly Im so grateful for my parents for gifting me this vehicle. However recently I've been working my ass off to afford my second car (which I need help deciding soooooo community help me out please?). Once decided, im planning to try modify it myself. Recent I've been thinking about getting a Skyline, particularly a 25GT or GT-V, yes I know overrated as hell, but I'm also considering a Chaser which I recently came to love. However my dream is to one day own a 180SX (So hard to find clean versions and im not really into importing).  Lastly before I send this off, I want to apologize if I sound tacky or pretentious. I try not to and want to genuinely learn from everyone and anyone. (Im no expert in this area) Thanks for reading!
×
×
  • Create New...