Jump to content
SAU Community

Recommended Posts

Which bolt on turbo will i need to make a

healthy250rwkw "BUT" with the most torque down low,

i figure i should run the more boost like 1.1bar to make it

rather than go external wich requires less psi but more

lag.

MY REASON: so on std boost my wife wont shit herself when it come on!!!

any help boys would be a appreciated

Link to comment
https://www.sau.com.au/forums/topic/64410-rb25-wnt-250rwkw-wich-turbo/
Share on other sites

  • Replies 40
  • Created
  • Last Reply

Top Posters In This Topic

i think he has a gtr, which means that gtrs's would be laggy and produce lots more than 250 when they do come on boost.

if it is for a gtr, try gtss's 2530's or N1s, already they wont have much low down power(less than 4 grand) but go any bigger ie gtrs's and you wont have much power low down at all.

best bet for stockish low end would be hiflo the stock turbos and run more boost.

i think he has a gtr, which means that gtrs's would be laggy and produce lots more than 250 when they do come on boost.

if it is for a gtr, try gtss's 2530's or N1s, already they wont have much low down power(less than 4 grand) but go any bigger ie gtrs's and you wont have much power low down at all.

best bet for stockish low end would be hiflo the stock turbos and run more boost.

READ the post title "RB25 wnt 250rwkw WICH TURBO??" :slap:

:cheers:

GTRS is your best bet, you'll never do it with a 2530. 2835proS will do it easily at only around 1bar, torque down low wont be quite as good as the GTRS, but you'll have plenty of scope for more power. You might say 250rwkw is more than enough right now, but when you get it, you'll want 260. :cheers: Then 270. Then you'll be looking at cams and more boost for the magic 300!

Stock fuel system isn't good for anymore than 250rwkw (unless you're from perth :cheers: )

2 mates with gtsts run 2535's and both make around 235 nonshootout mode... or 250-255 in shootout mode... very responsive and very quick.

Stock fuel system isn't good for anymore than 250rwkw (unless you're from perth :cheers: )

You think with Fuel pressure regulator and a good fuel pump the stock fuel system would be able to support 250rwKw? (and I'm from perth ehhehe :headspin: )

Im about to try a 2535 but dont have injectors at the moment, hope it'll get 250kw

will have results by end of month

well yeah if its rb25 then check out a hks2540 theyre a good well known mismatched turbo and is extra laggy but will flow more than 2530 in top end

or for around $2k get a gt30 with stock parts it should be laggy

but hang on a second, you said its for an rb25det, so do you mean

a) skyline gts with rb25det conversion

B) skyline gtst with stocker rb25det

not that it really matters

do you want

a) a mid power turbo that will hit 250rwkw

B) a mid/high power turbo with lots of lag and get 250 or a bit more

cos you've said you dont want low down torque as your wife will shit herself yet your looking at 2530, t51z etc which will have fairly good low down response (not laggy) and wont flow much top end (not enough for 250rwkw), sounds completely opposite to what you want? if you want laggy and flow enough for 250rwkw then i still stick with

hks 2540 (mismatched wheel/housing = laggy)

gt30 (on stock internals will be midish laggy, not much before 4k)

or speak to gcg in sydney and ask for a laggy turbo combination that will flow enough for 250rwkw on rb25det skyline maybe they can do a custom housing/wheel combo that it extra laggy for you and flow good for the same power level.

its for a gtS and the 2530 sounds torkie but if it blows i cant rebuild it thats y i like

trust turbos is there a greddy turbo thats like 2530 maybe T517Z or T518Z has  

anyone had one of these on the old gts??   :P  :D

If I mis-read your post I apologise, but are you talking about hanging an aftermarket turbo off the side of a standard RB25DE. If this is the case I highly recommend against it, as to achieve that power you will need to lower the compression and change the internals. These turbos are fine on a std RB25DET but not on a std RB25DE.

Within the month you will be looking at a total rebuild, if not a new block if it decides to "kick a leg out of bed".

Sorry boyz i meant GTST not gts. :headspin:

i dont think 250 rwkw with response/torque is a

contradiction at all its possible i just havnt found tha right

combo yet but i will.

Im not keen to push more than 250 so small bolt ons are

perfect for me. trying to find trust trbos with t3 flange cant find any?? is there any? :P

If I mis-read your post I apologise, but are you talking about hanging an aftermarket turbo off the side of a standard RB25DE.  If this is the case I highly recommend against it, as to achieve that power you will need to lower the compression and change the internals.  These turbos are fine on a std RB25DET but not on a std RB25DE.

Within the month you will be looking at a total rebuild, if not a new block if it decides to "kick a leg out of bed".

its rb25t my mistake,

but just so u know high compresion na motors arent a

bad thing with turbos u get a lot more grunt down low u

spin any turbo round 1200rpm faster u just need to tune

ur ecu properly did it twice on a vl and a skyline and i ran

26psi threw the skyline wich i didnt need wiv t3/4 combo

and 2000rpm gave full boost an massive burnout torque.

tru story :P

so you want 250rwkw thats laggy?

well thats easy gt30 stock internals, aftermarket ecu

youll be on the stock injector limit once it cranks past 4000rpm and hits its boost peak

also will need to do the usual bolt on mods exhaust, cai intake, clutch, tyres, airflow meter (not 100% but will help) etc. things like cams, better tune, cai intake will decrease lag and u want more lag so dont do any of those

check out the rb25 turbo upgrade dyno post (search for it) and find the most laggy looking dyno graph. copy their mods and you shold be sweet. i suspect the hks2540 will be the most laggy or gt30 with stock internals, the gt30 is suited for a midly tweaked engine

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • I got back to Japan in January and was keen to get back on track as quickly as possible. Europe is god-awful for track accessibility (by comparison), so I picked up a first-gen GT86 in December just to have something I could jump into right away. The Skyline came over in a container this time and landed in early January. It was a bit battered after Europe, though—I refused to do anything beyond essential upkeep while it was over there. The clutch master cylinder gave out, and so did the power steering. I didn’t even bother changing the oil; it was the same stuff that went in just before I left Japan the first time. Naughty. Power steering parts would’ve cost double with shipping and taxes, so knowing I’d be heading back to Japan, I just postponed it and powered through the arm workout. It took a solid three months to get the car back on the road. Registration was a nightmare this time around. There were a bunch of BS fees to navigate, and sourcing parts was a headache. I needed stock seats for shaken, mistakenly blew 34k JPY on some ENR34 seats—which, of course, didn’t fit—then ended up having the car’s technical sheet amended to register it as a two-seater with the Brides. Then there’s the GT86. Amazing car. Does everything I want it to do. Parts are cheap, easy to find, and I don’t care what anyone says—it’s super rewarding to drive. I’ve done a few basic mods: diff ratio, coilovers, discs, pads, seat, etc. It already had a new exhaust manifold and the 180kph limiter removed, so I assume it’s running some kind of map. I’ve just been thrashing it at the track non-stop—mostly Fuji Speedway now, since I need something with higher speed after all that autobahn time. The wheels on the R34 always pissed me off—too big, and it was a nightmare getting tires to fit properly under the arches. So I threw in the towel and bought something that fits better. Looks way cleaner too (at least to me)—less hotboy, less attention-seeking. Still an R34, though. Now for future plans. There are a few things still outstanding with the car. First up, the rear subframe needs an overhaul—that’s priority one. Next, I need to figure out an engine rebuild plan. No timeline yet, but I want to keep it economical—not cutting corners, just not throwing tens of thousands at a mechanic I can barely communicate with. And finally, paint. Plus a bit of tidying up here and there.  
    • Nope, needed to clearance under the bar a little with a heat gun, a 1/2" extension as the "clearancer", and big hammer, I was aware of this from the onset, they fit a 2.0 with this intake no problems, but, the 2.5 is around 15mm taller than a 2.0, so "clearancing" was required  It "just" touched when test fitting, now, I have about 10mm of clearance  You cannot see where it was done, and so far, there's no contact when giving it the beans Happy days
    • It's been a while since I've updated this thread. The last year (and some) has been very hectic. In the second-half of 2024 I took the R34 on a trip through Germany, Italy, France and Switzerland - it was f*cking great. I got a little annoyed with the attention the car was getting around Europe and really didn't drive it that much. I could barely work on the car since I was living in an inner-city apartment (with underground parking). During the trip, the car lost power steering in France - split hose - and I ended up driving around 4,000kms with no power steering.  There were a few Nurburgring trips here and there, but in total the R34 amassed just shy of 7,000kms on European roads. Long story short, I broke up with the reason I was transferred to Europe for and requested to be moved back to Japan. The E90, loved it. It was a sunk cost of around EUR 10,000 and I sold it to a friend for EUR 1,500 just to get rid of it quickly. Trust me, moving countries f*cking sucks and I could not be bothered to be as methodical as I was the first time around.
    • I assume clearances were all a-okay?
    • Shock tower brace is in +5Kw....LOL  
×
×
  • Create New...