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R33 Rb30 Conversion

JNR24

By JNR24,
in Engines & Forced Induction

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Cubes Grand Master

Cubes

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low747,

The OS 3ltr kit does use the stock tensioner and idler locations BUT they also use a custom belt.

We only have available what gates and a few other brands offer.

None of which meet the length requirement we need to use the stock setup.

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Duncan
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

JNR24
JNR24

fyi guys, Well yesturday i picked up a RB30 for my conversion into my R33. I will be using my RB25DET head on the RB30 block. So i started stripping the motor down, pulled the crank, pistons, girdle

Cubes
Cubes

Here is all I have at the moment: http://www.geocities.com/r32_jjc/ Unless you are on broad band make sure you right click then save as. The file is around 120kb. If there is anything I have got w

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Cubes Grand Master

Cubes

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gts25.

I'm going to be running a GT35R .82.

If I find it spools a little slow I will sacrifice a bit of top end and step down to the .62. Comparing turbine graphs, the .62 GT35R flows the same, if not slightly more than the .82 GT30R.

It should work fairly well. I'd imagine the biggest problem will be needing decent sized tyres to get it to the ground. :P

RB30DET pdf updated again. :rofl:

Cleaned up a couple of little bits and changed the section titles so they are easily identified when scrolling.

MonstaS4 Collaborator

MonstaS4

Posted
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from what i have heard, be prepared for the .82 housing to be a bit of a light-switch power hit. from hearing people talk about it, the 1.06 is much better suited for the 30DET, but again i have no personal experience here.

I'm running a 0.82 GT30 and it is by no means a light switch, so a GT35 0.82 would be far from it. Although, I am only running 8psi atm. The Haltech has boost correction dependant on the gear selected, so i plan to use this to soften the power delivery in 1st gear once boost is wound up.

Cubes Grand Master

Cubes

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Posted

Alf, Its in the RB30 guide under the Short Motor section. Its not the oil galleries, the rb's have 2 oil restrictors in the block. One towards the front and one towards the rear.

However, I have been told by two people (RIPS & SK) to leave the 30's oil restrictors the way they are.

However... My engine builder and I decided it would be best to match the size of the restrictors to the size of the rb20's.

RB30 - 1.8mm vs RB20's 2.4mm.

Our decision was based on RB20 & 25's generally not having the same issue as the RB26 where oil is dumped in to the head and is unable to return quick enough.

His view was the rb26's run a higher flowing oil pump, solid followers and rev much harder.

The RB25/30 runs a rb25det oil pump, hydraulic followers and rev's lower.

I think the RB25 head and or the rb30 block must drain oil from the head better than my old RB20, I can literally pour a bottle in upside down and the rocker cover won't fill up.

The RB20's was fairly easy to fill up and overflow.

Maybe my engine builder cleaned up the oil return to flow a little easier just incase.

RIPS did say the smaller oil restrictors helps to control blow by and prevents the can filling up as quick. I am yet to find out. :D

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