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Rb30det

Cubes

By Cubes,
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Cubes Grand Master

Cubes

Posted
Posted

There is a large thread that covers everything for the RB30 build.

If you use standard non turbo RB30E Pistons and bolt a RB25DE/T head on it will drop compression to around 8.2:1.

If you want a compression of around 9:1 you will have to go for custom pistons.

The standard RB30E Rods are extremly tough. Shotpeened & cleaned up etc.. will see them through to 300-350rwkw.

The RB30E Bottom end is 30mm higher than all of the other RB20/25/26 Blocks. So you cannot use RB30E rods in a RB20/25/26 block.

If you were to use RB25 Pistons you would acheive an extremly low compression ratio of around 7:1

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SXTACY Apprentice

SXTACY

Posted
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Hey Sumo,

That's a great thread, read it again, I'm sure you'll learn a few extra things the second time round (I did).

Anyways... there is a PDF file posted in that thread which specifically outlines how to get VVT working.

I can't remember 100% but something like you use the oil feed from the block to operate the solenoid for the VVT in the head.

Check the thread again and look for the PDF.

Cheers,

SXTACY

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93RPS13 Enthusiast

93RPS13

Posted
Posted
Originally posted by SXTACY

Hey Sumo,

That's a great thread, read it again, I'm sure you'll learn a few extra things the second time round (I did).

Anyways... there is a PDF file posted in that thread which specifically outlines how to get VVT working.  

I can't remember 100% but something like you use the oil feed from the block to operate the solenoid for the VVT in the head.

Check the thread again and look for the PDF.

Cheers,

SXTACY

SXtacy i believe that your were going to drop a RB26/30 hybrid in a silvia, did you do it? how where the Twin turbo exhaust dump and downpipes? also i cant find that pdf what is the name of it?

and did JNR24 ever post his RB30 engine swap guide thing?

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SXTACY Apprentice

SXTACY

Posted
Posted

Hey 93:

Here is the link for that PDF:

http://home.iprimus.com.au/mawler/RB30DET.pdf

Posted by Joel.

On the VCT topic, 25t posted this:

"To solve the VCT oil feed problem I removed the Vct solinoid and drilled straight down the vvt oil feed galery through a brass plug and into the cavity which houses the VCT solinoid. "

Regarding my engine... it won't be completed anytime soon (like maybe at the end of the year). I was doing the project as a sideline because my main project is my S15 which has a HKS 3037 and full engine rebuild and a host of other goodies that I'm trying to finish :)

With the RB30/26, I was going to drop it into something crazy like an S13 or I may lose the plot and put it into my S15... now that would be different :D

Cheers,

SXTACY

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Cubes Grand Master

Cubes

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There will be a final PDF made up and should be ready in the next week or two.. Hopefully.. :)

RB30E Pistons in AUS are from Nissan $720AUS.

Big End and Main Genuine Nissan Bearings are $250AUS.

I was going to used Forged ARIAS Pistons ($1600AUS) then decided against as I was chasing 300rwkw (402rwhp) which would require so much more outlay not just pistons (i.e external wastegates, Big injectors, more money cleaning up rods etc) For 260rwkw (348rwhp) I can get a reliable RB30DET that is making full boost by 3000rpm and pulling to 7000rpm. If you want 300rwkw you need to spend money basically.. :) For mid 250's (335rwhp) you can get away with a stock bottom end.

Mathoon is making 320rwkw (428rwhp) and is still using the standard Nissan bearings. He didn't go with the Nismo ones. It really depends on what the car is going to be used for. For a street weapon I would stick with the Nissan Bearings unless you don't mind spending a little more for the Nismo Bearings.

With the 4.33:1 Ratio diff the R32 runs the RB30DET should feel really pokey even off boost and due to the 7000rpm rev's I will still be able to clock 250km/h..

I slapped the rear wheel horsepower conversions in for the US blokes :D

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Gradenko Mentor

Gradenko

Posted
Posted
Originally posted by -Joel-

I slapped the rear wheel horsepower conversions in for the US blokes :)

Why not make it truly universal and talk about power at the engine. The US fellas will be using different dyno's to us, so talking about rw power is even less relevant than it is among ppl using the same make dyno. If I remember right, their dyno's would read higher for the same power as us. So 300rwkw to them is equivalent to 250rwkw to us (for example).

Its something that really irks me. What's 300rwkw anyway? I can ride a pushbike on a dyno and get that number with enough operator fudging.

Don't mean to single you out Joel, been meaning to say this for a while. Power at the eninge. Its the only goal to set.

(Really, whats your goal (300rwkw) at the engine?).

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Cubes Grand Master

Cubes

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Power at the engine is the only goal to set, but realistically it isn't pratical. Generally all of AUS's dyno's are pretty close in readings.

I am aware that a rolling road can be fudged but the point is why as when listing mods it will be obvious they are fudged.

My R32 GTS-T on the Dyno Dynamics when it was dead stock made 115rwkw on another Dyno Dynamics at D&T Performance exhaust made 113rwkw on a 34degree day. They are damn close.

I am aiming for around 350kw at the engine which with 30% drivetrain loss average equals out to around 250rwkw.

At the end of the day it is only a guide. Some thing to go by and compare roughly, however the readings should be looked at critically and not taken as gospel.. hrmmm maybe thats a bad example as I don't belive shiet thats in the gospel. :)

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Gradenko Mentor

Gradenko

Posted
Posted
Originally posted by -Joel-

Power at the engine is the only goal to set, but realistically it isn't pratical. Generally all of AUS's dyno's are pretty close in readings.

Depends on your definition of close, I guess :P. Theres a dyno in Perth that puts out hugely inflated figures (telling me I have enough power to run 11s), and every state will have one of those. Even if the dyno's do put out similiar numbers, theres things like auto or manaul, temp, gear ratio and the operator themselves that change can power output and driveline loss %. Its a fuzzy figure and a real pita to add 30% to get a guestimate flywheel figure everytime.

Its not practical to measure power at the engine, buts that not say its a useless figure. How else do you select a turbo? Or set a power figure to have your head flowed to? Rear wheel power figures don't mean much in real terms.

I am aiming for around 350kw at the engine which with 30% drivetrain loss average equals out to around 250rwkw.

Thanks, a figure I can get my head around :D.

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Cubes Grand Master

Cubes

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93RPS13.. I looked in to ceramic coating pistons etc and apparently it increases the chance of detonation however it does reduce engine temperatures slightly and obviously spool turbo's etc earlier as the exhaust gas is hotter and we all know hotter means faster velocity hence turbo spool. This is why some tuners slightly run the car leaner when not on boost as to increase the exhaust gas temp to spool the turbo's slightly quicker.

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SXTACY Apprentice

SXTACY

Posted
Posted

Hey kwazza11, mate I don't mean to argue (coz I'm new to this forum) but the idea of such a forum is so people can openly ask questions and learn a little from those who know.

We were all at a point where we didn't know what a gallery was...

However, having said that, yes, if you don't know what an oil gallery is, please don't try to do the conversion yourself as there is a steep learning curve you still have.

But ask as many questions you want, that's what this forum's here for - discussion :)

Cheers,

SXTACY

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