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What Is This Turbo?

Ryanrb25

By Ryanrb25,
in Engines & Forced Induction

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Ryanrb25 Grand Master

Ryanrb25

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hey guys, this is probably the billionth post like this...but i got this turbo, its only done a 1000km. I plan on bolting it to my rb25det in the meantime before the whole gt35r thing....

i need someone to tell me whats the deal with this turbo, good or bad, responsive or not...

all the info i have is its an rb25 rear housing with a machined wheel, a/r60 front cover t04???

part number on the core is 446179-5032 it says garrett.

here's a few pics.

thanks guys, appreciated..

also, if you guys did need wheel sizes etc...whats the deal? just get some verniers onto em?

post-23597-1196672463_thumb.jpg

post-23597-1196672492_thumb.jpg

Edited by Ryanrb25
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Dale FZ1 Veteran

Dale FZ1

Posted
Posted
part number on the core is 446179-5032 it says garrett.
Seems to be the 56T GT2871R. Should be pretty responsive!

Yes, that CHRA number = 56T GT2871 cartridge. With the larger (compared to 48T version) inducer size on the compressor, it should provide a responsive 240kW (maybe a bit more) on an RB25. Compared to the 48T version, it won't offer quite the same transient response (ie very close to stock-feel) but pretty good.

Any idea why your mate pulled it off the RB20, and/or what it drove like with that turbo fitted?

The Mafia Grand Master

The Mafia

Posted
Posted (edited)

hey mate

I've just had a look at this turbo on my Garrett Master spreadsheet, and it appears as Simon-R32 said - a 56 trim GT2871. I know that the 48trim version makes 220rwkw at 15psi, just send a PM to Dale_FZ1 as he has one and has done extensive testing. I will certainly point him at this thread, as he'll be very interested to see your results.

I've driven his car and it makes a full 15psi by 2800rpm on the RB25. Very responsive.

This would probably make full boost by 3,000rpm (a little later due to the more agressive 56trim) and yeah, I estimate would make about 240rwkw and *maybe* 250rwkw if you squeeze her a little more. Depends on the exhaust housing though, as they are restrictive as hell and the RB25 housing on my GT3076 only managed 240rwkw due to it being too small.

But this is definately a f**ken fantastic upgrade for a RB25.

Edited by The Mafia
Ryanrb25 Grand Master

Ryanrb25

Posted
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ah great news guys, cheers for your input, i got the turbo real cheap, its only done a 1000km so its still fresh..the pictures are bad i know but that actual rear wheel is as large as you can fit in that housing by the looks of how much its machined out...

my mate removed it off his rb20 due to the rings on number one going, he's currently forgie rebuilding it and wackin on a gt3540 off xr6t, not sure the rear they run i think .82 or something....but yea thats a different sorry.

The turbo on the 20 was a little laggy (rb20 nature anyway) came on strong at about 3700.

im about a week or so away from eventually fitting the gear so will have results soon for you guys.

anyone know if this core needs different fittings for oil, coolant etc..or will the standard rb25 lines suit? or is it just a matter of buying lines to suit gt2871r cores?

cheers for the info guys, really helpful, keep ya posted with results

  • 3 weeks later...
Ryanrb25 Grand Master

Ryanrb25

Posted
  • Author
Posted

guys, wacked on this turbo over the weekend, running 7psi through stock tune with Power FC and already am i amazed at the responce, pickup and kick of torque.....such a smooth torque band even without a tune and on 7psi....Putting injectors, z32, fuelpump in very soon, will keep you posted.

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