R33 Rb30 Conversion

[Dan_J]

my bad, maybe its just a Victorian thing. been awhile since i looked it up >.>

[RB25/30 GTi-R]

Hey everyone, am nearing completion of my RB25/30 build, but I seem to be stuck on setting up the timing.

 

I have drilled and tapped the block above the water pump for the timing belt tensioner, am using a RB25 idler below the water pump, crank is at TDC, but am unsure on where my cams are supposed to be at. I also have adjustable cam gears to go onto the cams, once the motor in full is set to TDC correctly. To make it easier, the block is a standard A6 VL N/A block, and the head is standard aswell, valves, cams, with the exception of the VVL being blocked off in the head.

 

If someone could help me out with this it'd be muchly appreciated. Have tried searching in this thread alone and also the whole of SAU, but cant find a definite answer. With 359 pages worth of thread here, I tried looking, but it seems a lot of people like to talk shit in here too which makes it all that much harder..

[Ben C34]

Line up the dots as per a normal rb25 / 26 /

[Dale FZ1]

Install the adjustable cam gears straight off and use the markers as per Ben's comment.  Then pay someone competent to degree your cams.  Hint: this is far easier and less time consuming to do on the bench/engine stand. 

[iruvyouskyrine]

Ben lay I remember the RB25 cam timing marks ended up being about 8deg out

[Hazzid69]

Hey team. 

Massive thanks for this thread. It's amazeballs. 

Just wondering if a factory 25DE ecu could be used to get a 30DET running. Just temporarily so I can check everything for leaks and I'm eating myself noises before it goes for dyno tune.

Not sure what ecu I'm going to use yet will speak to the tuner before to see what brands they are familiar with. 

 

Once again cheers guys

[KiwiRS4T]

I would advise against. I trailered my car to the tuner, got him to fit the Link and do the initial run in while he was tuning it on the dyno.

[Jeff2530]

I know....Rb25/30 boredom (not build ) question...but opinions will be cool

Need to know some real Hp/Kw figures for my build...just your guesstimation possibly. 

Build

25neo head.+1mm over int/exh..rear head drain

Stainless valves ..performance springs

Tomei cams (poncam)

Ati balancer ...prp collar..n1oil pump..forged gears..prp billet crank sprocket washers...billet backing plate to n1 pump..7L sump.. Stock crank acl bearings...87mm rb30 block..CP flat top pistons...Max peening H beam rods.

Fuel cell...1000hp fuel supply..1400cc injectors. 

6boost exh...45mm hypergate.

Haltech elite2000....flex fuel.

Real reason is so i know if my gearbox is going flying...

[Ben C34]

2 hours ago, Jeff2530 said:

I know....Rb25/30 boredom (not build ) question...but opinions will be cool

Need to know some real Hp/Kw figures for my build...just your guesstimation possibly. 

Build

25neo head.+1mm over int/exh..rear head drain

Stainless valves ..performance springs

Tomei cams (poncam)

Ati balancer ...prp collar..n1oil pump..forged gears..prp billet crank sprocket washers...billet backing plate to n1 pump..7L sump.. Stock crank acl bearings...87mm rb30 block..CP flat top pistons...Max peening H beam rods.

Fuel cell...1000hp fuel supply..1400cc injectors. 

6boost exh...45mm hypergate.

Haltech elite2000....flex fuel.

Real reason is so i know if my gearbox is going flying...

No turbo so approx 180kw

[Shoota_77]

7 hours ago, Ben C34 said:

No turbo so approx 180kw

Must have fallen off? Manifold and gate are there, just nothing to go whooshka. 

[Predator1]

On 04/09/2020 at 11:24 PM, Jeff2530 said:

Real reason is so i know if my gearbox is going flying...

Assume you have a R33? If so, then the torque of the RB30 will most def kill your box(Depends how much power you are actually shooting for).

[Jeff2530]

My bad sorry guys...Turbo is GT3540 1.02 .

Car is an r34gtt coupe.

[jaychen]

Is this still the thread to read with regards to high hp sohc rb30 applications?

[Shoota_77]

On 19/10/2021 at 11:15 AM, jaychen said:

Is this still the thread to read with regards to high hp sohc rb30 applications?

Most stuff on here will relate to DOHC heads.  
What info specifically are you chasing?

[Duncan]

Just thought I would bump this 20 year old thread because the Skid Factory have just posted up a video summarising a lot of the content, format might be more familiar for newer members