N/a Tune

[SKY-LINER34]

Hi all, the below table are the SPEC for the RB25DE, I have an auto NA 34 and would like to get some idea of the best, economical ways of getting about 150km at the wheels, open to suggestion and if possible please list the mod, cost and the installation cost.

EngineModelRB25DETypeWater cooling DOHCDisplacement, cc2498TurboNoCylindersSerial 6, 24 ValveMax Horsepower, hp / rpm200 / 6000Max Torque, Nm / rpm255.0 / 4000Fuel SystemEGI (Electronic Gasoline Injection)Fuel TypeGasolineCompression Ratio10.0Bore * Stroke, mm86 x 71.7Fuel Consumption, l/100km9.4

[dori34]

150km or 150KW at the wheels?

[SKY-LINER34]

150KW at wheels

[666DAN]

If it has to be kept N/A do the following

RB30 bottom end

Cams/Headwork

Decked block to bring compression to 10.5:1 (or through piston selection)

Aftermarket ECU

2.5" Exhaust with highflow cat converters

Install and fabrication costs will vary from shop to shop, but $8K should see a very reliable and well built setup that loves to rev

[Silhouette-R]

150rwkw/200rwhp out of an RB25DE is going to cost you.

Machine work (porting will have to be done and getting the compression up, 10.5:1 probably won't cut it, you should be trying for 11:1 - 11.5:1 for 2.5lt and costs for big cams also)

About - $4000

Aftermarket ECU - Min $1000 then to wire in and tune another $1000

Decent Extractors - $1000

Labour - min $1000

Cams and springs - $1500

Oil an water pumps - $500

Exhaust piping - $750

Lightened Flywheel and new clutch - $1000

So about 11G should net a figure around 150rwkw probably 160 - 170rwkw, but in saying that people would say you spent all that money and get such a tiny power figure, but really that setup would be good for a mid - high 12 to low 13 sec quarter pass which isn't slow for an N/a

[dori34]

OR strap on a turbo with supporting mods, tune & install costs looking around $6k and under

[drive2slide]

that setup would be good for a mid - high 12 to low 13 sec quarter pass which isn't slow for an N/a

12 second quarters would be asking way, way too much from 160rwkw on a 34. My mate has a Del Sol CRX (non turbo worked to the shit) with 171rwkw and he cuts 12.1 sec quarters, and his car is light as shit compared to the weight of a 34.

[Eug]

everyone has pretty much summed it up, a lot of cash, research, cubes and revs!

[SKY-LINER34]

yeah it sure is, i guess it would be cheaper for me sell it and get a R34 GTT lol.

[MBS206]

Pull RB25 out.

Replace with an LS1. Leave LS1 standard, be happy with around 180RWKW or maybe a touch more...

[SKY-LINER34]

OMG that would cost an arm and a leg for the LS1, and getting someone to fit and tune wouldnt be easy.

[Eug]

actually i've looked into it, the LS1 is the best bang for buck motor you can put in to run reliably and make so much more power.

[GTS4WD]

Eugene.. Selling!?

[Eug]

correct mate. i'm parting it out to suit the selling cost.

looking to get into property and have a 6 litre ute i'd like to get my hands on!

[Vik]

150rwkw/200rwhp out of an RB25DE is going to cost you.

Machine work (porting will have to be done and getting the compression up, 10.5:1 probably won't cut it, you should be trying for 11:1 - 11.5:1 for 2.5lt and costs for big cams also)

About - $4000

Aftermarket ECU - Min $1000 then to wire in and tune another $1000

Decent Extractors - $1000

Labour - min $1000

Cams and springs - $1500

Oil an water pumps - $500

Exhaust piping - $750

Lightened Flywheel and new clutch - $1000

So about 11G should net a figure around 150rwkw probably 160 - 170rwkw, but in saying that people would say you spent all that money and get such a tiny power figure, but really that setup would be good for a mid - high 12 to low 13 sec quarter pass which isn't slow for an N/a

Wow that is a shit load, you might aswell sell and get a GTT, and even with money remaining, do some supporting mods and hit some good figures i guess!

MRXTCZ

[SKY-LINER34]

yeah that seem like a better soultion, how about a bolt on Turbo? Is the RB25DE internal the same as the RB25DET?

[Silhouette-R]

I hope you are joking....

[N-DAWG]

no they are not the same. RB25DE = high compression RB25DET = low compression. The low compression is made up for by boost via the turbo.

http://www.skylinesaustralia.com/forums/Rb...l&p=4306941

Simply bolting on a turbo to the RB25DE will not run properly and kill it very quickly. An RB25DE+t can be done though with the right parts, the right engine management that can handle fuel and ignition timing, and good tuning, and of course supporting mods such as fuel pump and injectors to meet the new demands, and of course keeping the boost level at a safe limit.

The hardest part is going to be whether you can do the labour, or paying a workshop to do it, and of course finding a workshop who will not only do the labour but will be willing to tune it. A fair few workshops refused to do it, or refused to tune such a set up. If you do it, make sure the tuner is confident with it.

I think it will be wise for you to have a read through the How To Turbo N/A Skyline thread. What I said above is a very very condensed version. It will also be good to look at the differences between an RB25DE and RB25DET engine.

http://www.skylinesaustralia.com/forums/tu...N-A-t33407.html

In regards to an LS1, this has been done on a number of S13's and a quick google shows that there's R34's that have had the LS1 treatment. There was a 320kw LS1 powered S13 in HPI Magazine issue 83.

Could always do a twin turbo LS1

http://www.ls1.com.au/forum/showthread.php?t=61035

http://videos.streetfire.net/video/Nissan-...1-V8_169208.htm

http://videos.streetfire.net/video/Nissan-...-with_95344.htm

[and3_3]

Im pretty sure gtst's are cheaper than gts' these days because of the p-plate laws so sell your gts to a eager p-plater and get a very common gtst for cheap.

The market is great for buyers atm but shit for sellers.

[SKY-LINER34]

oh really anyone want a trade?