SKY-LINER34 Posted December 27, 2008 Share Posted December 27, 2008 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 Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/ Share on other sites More sharing options...
dori34 Posted December 28, 2008 Share Posted December 28, 2008 150km or 150KW at the wheels? Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4337432 Share on other sites More sharing options...
SKY-LINER34 Posted December 28, 2008 Author Share Posted December 28, 2008 150KW at wheels Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4337434 Share on other sites More sharing options...
666DAN Posted December 28, 2008 Share Posted December 28, 2008 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 Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4337531 Share on other sites More sharing options...
Silhouette-R Posted December 29, 2008 Share Posted December 29, 2008 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 Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4338468 Share on other sites More sharing options...
dori34 Posted December 29, 2008 Share Posted December 29, 2008 OR strap on a turbo with supporting mods, tune & install costs looking around $6k and under Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4338531 Share on other sites More sharing options...
drive2slide Posted December 29, 2008 Share Posted December 29, 2008 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. Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4339214 Share on other sites More sharing options...
Eug Posted December 29, 2008 Share Posted December 29, 2008 everyone has pretty much summed it up, a lot of cash, research, cubes and revs! Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4339239 Share on other sites More sharing options...
SKY-LINER34 Posted December 29, 2008 Author Share Posted December 29, 2008 yeah it sure is, i guess it would be cheaper for me sell it and get a R34 GTT lol. Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4339273 Share on other sites More sharing options...
MBS206 Posted December 29, 2008 Share Posted December 29, 2008 Pull RB25 out. Replace with an LS1. Leave LS1 standard, be happy with around 180RWKW or maybe a touch more... Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4339578 Share on other sites More sharing options...
SKY-LINER34 Posted December 29, 2008 Author Share Posted December 29, 2008 OMG that would cost an arm and a leg for the LS1, and getting someone to fit and tune wouldnt be easy. Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4339759 Share on other sites More sharing options...
Eug Posted December 29, 2008 Share Posted December 29, 2008 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. Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4339786 Share on other sites More sharing options...
GTS4WD Posted December 29, 2008 Share Posted December 29, 2008 Eugene.. Selling!? Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4339921 Share on other sites More sharing options...
Eug Posted December 30, 2008 Share Posted December 30, 2008 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! Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4339957 Share on other sites More sharing options...
Vik Posted December 30, 2008 Share Posted December 30, 2008 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 Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4340228 Share on other sites More sharing options...
SKY-LINER34 Posted December 30, 2008 Author Share Posted December 30, 2008 yeah that seem like a better soultion, how about a bolt on Turbo? Is the RB25DE internal the same as the RB25DET? Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4340942 Share on other sites More sharing options...
Silhouette-R Posted December 30, 2008 Share Posted December 30, 2008 I hope you are joking.... Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4340972 Share on other sites More sharing options...
N-DAWG Posted December 30, 2008 Share Posted December 30, 2008 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 Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4341022 Share on other sites More sharing options...
and3_3 Posted January 1, 2009 Share Posted January 1, 2009 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. Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4342675 Share on other sites More sharing options...
SKY-LINER34 Posted January 8, 2009 Author Share Posted January 8, 2009 oh really anyone want a trade? Link to comment https://www.sau.com.au/forums/topic/250316-na-tune/#findComment-4357051 Share on other sites More sharing options...
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