Jump to content
SAU Community

Factory Response Aftermarket Turbo - Rb25

colourclassic

By colourclassic,
in Engines & Forced Induction

 Share

Recommended Posts

colourclassic Mentor

colourclassic

Posted
Posted

As title says, what is the absolute most responsive aftermarket turbo available for an RB25?

The factory turbo on R33's delivers great response and driveability and can deliver around 10psi of boost safely without spinning the ceramic turbine wheel off.

If not for the ceramic turbine wheel, would I be correct in assuming that the factory turbo would be able to deliver roughly 14psi without losing efficiency, and make around 230rwkw?

Is there a turbo with similar A/R's, trims etc to the factory Garrett but with steel/inconel/alloy wheels?

If so name it please!

hypergear Grand Master

hypergear

Posted
Posted

We can high flow your standard turbo that has similar response to factory, while making a lot more power.

That is 20psi by 3400RPM maxing 320rwkws on E85. We usually seeing around the 260rwkws on P98 fuel.

Every thing looks stock standard, and bolt back on the way it was. No fabrications required.

colourclassic Mentor

colourclassic

Posted
  • Author
Posted

I just sold my #hypergear highflow because it was too uneconomical for me to run. The power was great, but I don't need or want "20psi by 3400rpm". I can't afford the fuel costs or supporting mods to run 320rwkws.

I literally want the little factory Garrett but with a metal turbine wheel, so I can run a measly 12-14psi and make a little over 220rwkws on PULP with a PowerFC. I want full boost at ~2500rpm like the stock turbo!

:)

Blackkers Experienced

Blackkers

Posted
Posted

I've got one on an RB25det as a street car. With boost leaks it will make 20psi by about 3300RPM uphill in 4th.

you never have to change down gear above 50km/h in 4th.

but it doesn't respond as well as the stock turbo. The factory turbo makes the car feel like a small block chevy compared to the highflow. But it has major drawbacks.

If rebuilt to standard specs with a better bearing cartridge and steel wheels I'm sure you won't lose much response and on e85 you could push probably up towards 16-18psi. Remember ceramic/nylon wheels are lighter (I assume) which helps transient response

  • Like 1
colourclassic Mentor

colourclassic

Posted
  • Author
Posted (edited)

The factory turbo makes the car feel like a small block chevy compared to the highflow...

Yes!! And that's what I want!

I've had a 270rwkw Skyline, and as fun as it was, it was more fun around town (where I drive most) with the stock turbo. Next to no lag, and enough power to have fun.

Edited by colourclassic
colourclassic Mentor

colourclassic

Posted
  • Author
Posted (edited)

Just send it to Hypergear and ask for it to be rebuilt to standard Nissan specs but with steel wheels and not high flowed.

Can hypergear do this?

Edited by colourclassic
hypergear Grand Master

hypergear

Posted
Posted

Stock turbocharger was making 10psi by 2800RPM. Any thing that build boost faster results in compressor surges on partial load.

Most of the high flows I've done were built to generate about 260rwkws on P98 fuel. I can build some thing smaller to match factory boost curve, that works with standard ECU also.

By the way, The original turbocharger that I've high flowed for you was a Neo turbo. R33 turbine housings are smaller, in comparison is 500RPM more responsive.

Munkyb0y Grand Master

Munkyb0y

Posted
Posted

A good used HKS 2535 may be what you need.

Crazy response, but will choke at top end. 230rwkw type of power.

I think they can handle high teens worth of boost.

or for a little bigger look at the HKS GT-RS

wolverine Grand Master

wolverine

Posted
Posted

Stock turbocharger was making 10psi by 2800RPM. Any thing that build boost faster results in compressor surges on partial load.

Most of the high flows I've done were built to generate about 260rwkws on P98 fuel. I can build some thing smaller to match factory boost curve, that works with standard ECU also.

By the way, The original turbocharger that I've high flowed for you was a Neo turbo. R33 turbine housings are smaller, in comparison is 500RPM more responsive.

This^^

colourclassic Mentor

colourclassic

Posted
  • Author
Posted

Stock turbocharger was making 10psi by 2800RPM. Any thing that build boost faster results in compressor surges on partial load.

Most of the high flows I've done were built to generate about 260rwkws on P98 fuel. I can build some thing smaller to match factory boost curve, that works with standard ECU also.

By the way, The original turbocharger that I've high flowed for you was a Neo turbo. R33 turbine housings are smaller, in comparison is 500RPM more responsive.

If you can build something which will match the factory boost curve/response, please PM the info Stao! I'd prefer a roller bearing CHRA too if possible!

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

You know the bigger the turbo the more economical the car is? :)

You're not always on boost haha.

In saying that, if you're after response check out Borg Warner turbos. They're truly amazing however will burn a hole through your pocket

Ryno Experienced

Ryno

Posted
Posted

Sounds like you're after my setup...

MX Performance exhaust manifold (with 1" runners), External wastegate with HKS GT-RS turbo with internal wastegate removed and welded closed.

With this setup the turbo is just as responsive as stock ~ 5 psi at 2000 rpm, however it has around 280 rwkw. Economy wise, I average around 10litres/100km.

My car is a daily drive, so I wanted no compromises on driveability... Check out my build thread for more info...

http://www.sau.com.au/forums/topic/409509-rynos-r32-over-a-decade-and-counting/

  • Like 1
M@&k Community Regular

M@&k

Posted
Posted

There's also some companies offering bolt ons (exhaust side at least) for the GTX2860/63/67. Probably better off getting Hypergear to refurb a stock turbo, but throwing it out there for interest.

SonicPerformance is doing turbo with housing:

http://www.sonicperformance.com.au/Turbocharger-Upgrades/Nissan/Skyline-_dash_-Single-Turbo/pl.php

Kudos has a kit on GTX2867 only:

http://www.kudosmotorsports.com/catalog/garrett-turbocharger-kit-garrett-gtx2867r-nissan-skyline-r33-gts25t-r34-25gtt-rb25det-special-introductory-price-p-1459.html

hardsteppa Grand Master

hardsteppa

Posted
Posted

Currently running a td05-18g, previously a hypergear hiflow, on r33/rb25. Both good for comparable to stock response, for the OP i would prob go with Stao's offer to build u one for your needs. I like the td05 but not really worth the dicking around to get to fit.

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • MBS206
      Mistakes were made, my R34 Story

      By MBS206 · Posted

      The oil pressure sensor for logging, does it happen to be the one that was slowly breaking out of the oil block? If it is,I would be ignoring your logs. You had a leak at the sensor which would mean it can't read accurately. It's a small hole at the sensor, and you had a small hole just before it, meaning you could have lost significant pressure reading.   As for brakes, if it's just fluid getting old, you won't necessarily end up with air sitting in the line. Bleed a shit tonne of fluid through so you effectively replace it and go again. Oh and, pay close attention to the pressure gauge while on track!
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      I don't know it is due to that. It could just be due to load on track being more than a dyno. But it would be nice to rule it out. We're talking a fraction of a second of pulling ~1 degree of timing. So it's not a lot, but I'd rather it be 0... Thicker oil isn't really a "bandaid" if it's oil that is going to run at 125C, is it? It will be thicker at 100 and thus at 125, where the 40 weight may not be as thick as one may like for that use. I already have a big pump that has been ported. They (They in this instance being the guy that built my heads) port them so they flow more at lower RPM but have a bypass spring that I believe is ~70psi. I have seen 70psi of oil pressure up top in the past, before I knew I had this leak. I have a 25 row oil cooler that takes up all the space in the driver side guard. It is interesting that GM themselves recommend 0-30 oil for their Vette applications. Unless you take it to the track where the official word is to put 20-50w oil in there, then take that back out after your track day is done and return to 0-30.
    • PranK
      My new to me M35 Stagea wagon

      By PranK · Posted

      Nice, looks great. Nice work getting the factory parts also. Never know when you'll need them.
    • Chupapy
      New r33 owner

      By Chupapy · Posted

      Thanks @jtha7 I will have a look around tomorrow but it is a prick of a spot. These are some photos i tried taking 
    • GTSBoy
      Mistakes were made, my R34 Story

      By GTSBoy · Posted

      I take it that the knock retard is from bearings tapping a little tune? Thicker oil is a fragile bandaid. You need a much bigger oil cooler and probably the bigger pump being discussed.
×
×
  • Create New...