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Rb34 / 24U (Rb26 + 800Cc) - Project RB high deck engine (and related builds)

GTRNUR
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GTRNUR
GTRNUR

Quick Update. I finally got a weekend off work and was able to visit a Springmount Raceway, which is a new drag strip that was built and 1.5 hrs drive from Cairns. I only ended up doing two

GTRNUR
GTRNUR

There has been big developments with the project.  Towards the end of June I completed and delivered the rebuilt RB33.  It has been run a few times and initial indications are that it should perform v

GTRNUR
GTRNUR

Update Time! Its been a long road to get here, but I finally have some test results for the engine. Last weekend Trent Whyte and Gordon Leonard from Mercury Motorsports jumped on a flight to tune my

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GTRNUR Grand Master

GTRNUR

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Nearly run in ! 909Km on the engine now.

Just about to order a radiator upgrade too. A custom twin pass cross flow PWR radiator, so i'll be ready when the time comes to do the power tuning.

post-26553-0-25181900-1391493067_thumb.jpg

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  • 2 months later...
GTRNUR Grand Master

GTRNUR

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The run-in is now completed and I did the oil change last weekend.

I haven't done a full power tune yet as there are a few support modifications I need to sort out first. I have changed my old single core radiator out for a custom PWR twin pass with a spal thermo as well, which seems to work very well in the tropics. I also fitted an Apexi active exhaust silencer which does well to tame the exhaust note. I can talk to my passengers now, except for when the gates are open!

Tune wise, I have the low boost/low end to about 5000 rpm pretty much sorted. That's about all I'm game to do on the street though.

I have to do a few fuel and ignition system changes before I book dyno time. My day to day work and finishing home renovations has taken priority lately though. It will probably be a couple more months till I have some actual results.

  • 2 months later...
GTRNUR Grand Master

GTRNUR

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I'm having a day off work today to install some of the parts I've been collecting over the past few months.

Another new PWR radiator (first one had clearance/fitment issues).

Set of ID1000's and a new fuel system and more Tomei parts (no e85 up here, so i'll be using a 110 octane race fuel for final power runs)

DBA5000 rotors and new pads

Updated catch can arrangement (fully enclosed and relocated so I can add a new oil cooler system)

Relocated power steering tank.

Water-oil heat exchanger

Its also approaching end of financial year so I've got a mountain of paperwork to catch up on. The good news is that I am preparing to have 2 more blocks machined up, which I am planning on putting in the hands of some tuning companies down south that are interested in developing / distributing the product. I am just sourcing the composite materials that I use to partially fill the block with at the moment, and then next month it will be off to the machine shop with it all.

Renovations are going well though too! Nearly all finished, except that no rooms have doors yet.

bigmikespec Veteran

bigmikespec

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Renovations are going well though too! Nearly all finished, except that no rooms have doors yet.

All sounds exciting mate.

Don't worry... I had no internal doors for 6 months... now that doors installed, they are such an inconvience, lol.

  • 3 months later...
GTRNUR Grand Master

GTRNUR

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I moved back into my house again 2 weeks go, and have been able to work on the car again a little more regularly.

I have been driving it regularly when possible. There is now over 4000km on the engine. The wastegates now have 1.4 bar springs in them, and I have been adjusting the street tune to a 100 octane blend. This has made the car too quick to tune on the street for high boost levels. The data logging rate can't keep up with acceleration, so its defiantly dyno time to finish that.

I recently replaced all the suspension in the car with a Tein EDFS Active setup, ditching the Nismo Stunes that were in the car. Its so much more comfortable to drive, and it doesn't try and change lanes now as it comes onto boost in the lower gears anymore. Way more planted.

The hold up now is that I'm waiting on an under car surge tank setup. I decided to go with a new Aftermarket Industries design under car surge tank with Holly 1400 pump setup. Its going to be 4-5 weeks till it arrives so I am told.

The base machining of two more engine blocks is now finished. I hope to have them in the CNC mill in a month or two, and then will be looking to put the blocks in the hands of some tuners down Sydney/Melbourne way to see what they can do with them.

No Crust Racing Grand Master

No Crust Racing

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Odd question, but how does it sound?

A lot of people pan the 3L conversions for losing the distinct RB26 sound. I realise this well beyond a 26, but at least you've retained the block.

How would you compare the sound or do you have any clips?

GTRNUR Grand Master

GTRNUR

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Its got a tough cam'd idle at around 1000 rpm, but its possible to tune that out if I run a richer idle, and have it idle at 900 quite smoothly.

I have a trust TI-R 90mm exhaust on the car which is basically straight through, but I also have an Apexi active silencer in the tip of the muffler to quieten it down a little for when I am driving through the city. The difference that it makes is that you can have a conversation with your passenger. Downside is that it adds 800 RPM of lag, so it makes full boost at 4000 rpm now, not 3300-3400ish.

I've been meaning to buy a go pro or even a basic dash cam... Maybe I'll get the urge to do so this weekend.

  • 5 weeks later...
GTRNUR Grand Master

GTRNUR

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Ive put a few more thousand km are on the engine as I've been driving it every day for work lately. Surge tank/pump is still on back order so Ive decided to upgrade the ECU as well now, and ordered a Haltech Platinum yesterday. The power FC is giving me grief with the resolution of tuning being too low.

Here's a quick video I took today of a walk around the car. At a glance you can see my new closed breather setup which drains back to the sump, and the revised cooling setup with the second version of my 70mm PWR twin pass radiator plus the oil to water heat exchanger. This is the trust Ti-R 90mm exhaust with the apexi 115mm silencer in the tip too. It quite effectively turns a track exhaust into something close to legal and streetable.

https://www.youtube.com/edit?o=U&video_id=OAmQOHNEZvM

GTRNUR Grand Master

GTRNUR

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Yeah... It has been ok for a beginning, but its too long in the tooth now.

Just got a call from the office and my Haltech has arrived already. Ordered lunchtime yesterday... So I know what Im going to try and get done this weekend...

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