Rb25Det Next Step

[lincellusion]

Hey guys. so just a quick rundown to whats been done to my 33 gtst:

Haltech platinum pro

850cc injectors

fmic

walbro in tank pump

haltech boost solenoid

intake

3" catback (turbo to cat is still stock)

on 12psi im making 233kw atw with full boost at 3500rpm (pretty sure turbo is stock, looks like it is, so wont go over 12psi)

at the end of the day, I want around 400kw atw, which is why im starting to search into building either a 30 block or 25 block (30 block seems more the better choice though). in the mean time I want to get a bit more oomph out of the car, so what I want to do is just some tomei poncams on, upgrade the turbo (either t04z or gt3076, but the 3076 wont get me to my final power goal down the track I dont think). at this stage, do you guys think putting in the haltech flex fuel and getting it tuned for full 85 tune and the 98 tune so I can then use 85 when I want? I was told by someone I need an 85 safe pump and injectors, but my tuner said I can do it with whats on it but didnt say if my injectors (power enterprise 850cc) and pump is 85 safe? cheers for any advice, just interested to see what people reckon, getting that extra power out of ya cars always exciting.

[75coupe]

233 with stock turbo, ive never heard of this?

To4z and 3076 are very different output turbos.

400kw from std rb25 is def pushing it.

Have you ever driven 300kw on the street? Cause it is a pretty big figure really for street.

What makes you want 400kw?

What are you doing that makes you want that figure??

[lincellusion]

from driving mates cars is why i wanted that figure, but then the other night when i drove a 340kw 34 gtt and had no traction makes me think twice about building an engine and going high power, if I can get the std bottom end to 300kw safely (I know safely isnt a word used when talking bout stock bottom ends lol). which is why im wondering if it is safe to do 85 with my setup, and if its even worth it? and also, I know what you mean about my stock turbo, ive seen gt30's do less then that lol. I am not 100% its stock, think it MAY me highflowed (if so, then i can chuck more boost through it) what I am gonna do is pull the dump off when I get a chance and put a magnet to the exh turbine, hopefully it sticks

[wolverine]

I know this is all very exciting to make some more power but the best bet is to stop and do a lot of reading and researching. Everything you have ever thought of doing has been done more that once so take the time to narrow down what you really want before starting with a scatter gun approach.

ps. the magnet will tell you nothing but if the turbine housing is machined out then you will know more, if there is an ID tag (eg. GCG hiflow) then you can save your time with the dump.

[Blackkers]

Mate, highflows won't make that sort of power at that sort of boost level.

233rwkw at 12 psi is no where near a stock turbo. a GCG highflow will make around that power at 20psi. hypergear's will do it around 15psi.

So unless you have a massively inflated dyno figure I'd be willing to bet your turbo isn't stock! The guys on the forum are pretty damn good at identifying turbos if you want to throw up some pictures? I'm sure someone can figure it out,

[lincellusion]

hmm, lets hope the dyno isnt off then lol. ill try and see if i can get some pix of the turbo this arvo for yas

[lincellusion]

if it means anything, the previous owner said he blew the stock turbo, so went to just jap and paid around $2200 for a upgrade bolt on... even though the turbo still has nissan written on it.

[75coupe]

its not stock turbo then!

I agree as above as it seems u dont really know what is needed or how to go about it...

Lots of reading will help you, others have done these things and their trial and error will help you understand what works and why it worked for their goal... Having a power level goal i dont believe is the best way to start if you havnt driven a car with power before, and i dont mean a half hour drive up the road in someone elses car.

[lincellusion]

yeah a half hour drive doesnt help, but having owned a 320kw mk3 supra and just got rid of it to get the skyline did give me some experience with light rear ends. will do some reading.

[Joshbigt62r]

Yep reading lots is your friend. Really sounds like you have no real set idea in your head of what you really want from the car. And research this forum is what you need to do to work out what you want out of it and how far you want to go. As not having a rough idea what you want out of it can end up very costly. For example you said your turbo choice is a 3076r or t04z, two completely different turbos which does not really make sense,lol. A 3076r will come close to 360rwkw on e85 setup correctly. So not far from your goal of 400kw. I wouldnt bother with a t04z as there a dated turbo now and will be rather laggy on a rb25. I strongly consider a gtx3071r, very good all-round turbo for a rb25 on e85. 340rwkw with awesome response. I could go on and on but I think you get the idea.

Cheers Josh