Jump to content
SAU Community

Any feedback on GReddy Turbine Kit T620Z in r33 GTST/RB25DET?

jacobzking
 Share

Recommended Posts

jacobzking Contributor

jacobzking

Posted
Posted

I'm looking for a direct bolt on turbo upgrade for my 93 R33 GTST.  Anyone have experience with this Greddy T620Z turbo upgrade? I'd like to be able to run about 300hp to the rear wheels without putting too much strain on the turbo. I do daily drive the car.  Pretty stock car with basic bolt ons (exhaust outlet, down pipe, high flow cat and catback exhaust along with intake and FMIC).  I'l probably have a Haltech plug n play on the car before installing the turbo.

https://www.greddy.com/products/turbo-upgrade-ecr33-er34-t620z-rb25-11520057

 

Also, any thought on this much boost on a 30 year old motor with 250,000KMs?  Engine feels/sounds strong for what it's worth.

 

Thanks you in advance!

Murray_Calavera Mentor

Murray_Calavera

Posted
Posted

A couple of things, firstly omg that turbo is expensive! $3,000 USD for dinosaur technology is robbery. You could buy a G series turbo and have a good amount of change instead. 

If you want a good budget option, have a look here - https://hypergearturbos.com/product/rb25dethighflow/

If you are keen to spend more, have look at the modern turbos, Garrett G series, Borgwarner EFR, etc. Have a look at the RB25 dyno results thread for inspiration. 

If you upgrade your turbo to something that will support the 300hp you want and only "probably" have Haltech ECU, your car will only "probably" run. Actually, no it won't run. You are going to need the ECU and injectors at the time you do the turbo upgrade. 

No thoughts on "this much boost" as you didn't say how much boost that actually is. Having said that, plenty of unopened RB25's making even more power then what you are chasing. 

 

  • Like 1
Duncan Grand Master

Duncan

Posted
Posted

300hp (225kw) is barely outside the standard turbo's range with a bit of extra boost in it (200ish).

If you are going to change the turbo you should aim for 250-300kw (330-400hp) to make the expense worthwhile :)

  • Like 1
joshuaho96 Veteran

joshuaho96

Posted
Posted

Wasn't there some discussion of how the Hypergear high flow actually has different dimensions so it's not a true bolt-on replacement? Honestly if that's the case I would consider just going true twin scroll and go down a massive rabbit hole of getting all that to package as close to stock as possible.

GTSBoy Grand Master

GTSBoy

Posted
Posted
52 minutes ago, joshuaho96 said:

Wasn't there some discussion of how the Hypergear high flow actually has different dimensions so it's not a true bolt-on replacement? Honestly if that's the case I would consider just going true twin scroll and go down a massive rabbit hole of getting all that to package as close to stock as possible.

Yeah - the Hitachi core is huge (long) and the core Tao uses is quite short, so the compressor housing moves backwards.

But I wouldn't let that stop me. In fact, I didn't.

But I imagine that the correct thing to do is to go for the latest G series on an Artec manifold. In V band. And f**k the twin scroll, because short short Artec manifold runners + easy install/removal/adjustment outweigh the small loss in spool.

joshuaho96 Veteran

joshuaho96

Posted
Posted
1 hour ago, GTSBoy said:

Yeah - the Hitachi core is huge (long) and the core Tao uses is quite short, so the compressor housing moves backwards.

But I wouldn't let that stop me. In fact, I didn't.

But I imagine that the correct thing to do is to go for the latest G series on an Artec manifold. In V band. And f**k the twin scroll, because short short Artec manifold runners + easy install/removal/adjustment outweigh the small loss in spool.

Yeah, but twin scroll is the OEM thing and I love pain.

joshuaho96 Veteran

joshuaho96

Posted
Posted
11 hours ago, GTSBoy said:

There's no twin scroll on the OEM turbos. On the manifold, kinda, yes. Not on the turbos.

Rather it's the OEM thing these days. I don't think I see single turbo monoscroll on any I6. Obviously back then twin scroll turbos weren't readily available so I saw a lot of "twin entry" designs which had a divider on the manifold but nothing on the turbo.

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted
45 minutes ago, joshuaho96 said:

which had a divider on the manifold but nothing on the turbo

And that alone was a huge improvement to single merge collector.

Those early "experts", used to grind down the divider for "flow" and lost response.

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

    • Shoota_77
      Shoota's R33 GT-R RB30/26

      By Shoota_77 · Posted

      Ended up spending a WHOLE day yesterday cleaning and rearranging my shed.  Due to the aforementioned disorder, my shed is as cluttered and confused as my brain. Again, because of said disorder,  at any one time there are 5 projects on the go at once and because they're still on the go I don't put everything away so I can "get straight back to it" which rarely happens.. So anyway,  I bought a couple of cheap 2mx2m all steel "pallet racks" to put in my back shed.  The idea is to then take pretty much everything out of the main shed that isn't car related. Most of the garden and building stuff is now booted out to the back shed and onto to the shelves where they belong! There's still more rearranging and reallocating to do and it's still a bit busy in there but it's a massive improvement on how it was previously. I've discovered floor space I forgot I had...  For those that have fully dismantled a car before will understand just how much space it takes up!  Particularly panels, bumpers, engine/trans, etc.  I've got stuff hanging on every available wall to get it up off the floor!  This is not exciting content for a blog but has certainly made the shed feel like a more work ready space now!
    • hypergear
      Hypergear Turbochargers and High flow Services Development thread

      By hypergear · Posted

      Updating results from our ATR43SS-1 turbo in T3 .63, OEM bolt dump pattern. Not a big number but pretty sweet for a stock Rb20det. Car's managed to pull 220rwkws at 20psi, perfect boost control internally gated with EBC and excellent mid top end power band as they usually skydive after 5.5K. Usual bolt on supporting mods and inlet plenum and factory location exhaust manifold. Pump 98 fuel was used (Ron 93).     
    • GTSBoy
      Neil's R33 Gts-t Build

      By GTSBoy · Posted

      Yeah, well, it's not as though anyone is ever going to buy one of those noisy f**kers and put it into a new installation when there are better pumps that are near silent for less money from Ti.
    • Duncan
      Rebuilt Rb25det issues

      By Duncan · Posted

      I'd suggest having the engine builder listen to it, especially if they assembled it, and minimise how much you run it in the meantime. It may have a serious issue like a big end bearing from the description and I assume the rebuild was not cheap
    • Duncan
      Neil's R33 Gts-t Build

      By Duncan · Posted

      Quite right, typing without checking, it is an 023 which was effectively the replacement for 040 (not that I could find either of them on the Bosch motorsport AU site), and it has a mesh inlet at the bottom of the pump rather than a separate filter
×
×
  • Create New...