GT2871r help

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hugogos22
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Hey guys i just bought a gt2871r the "HKS GTRS copy. My question is will i need a Oil Restrictor . Its a garret.


codyace
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Yes. http://www.atpturbo.com sells them, for ball bearing turbos

And FWIW: It's not a copy of the HKS GTRS at all. the GTRS HKS is closely related to the 2835.

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hugogos22
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Hey codyace thanks for the reply does this garret have a built in oil restrictor ? Which one would i use and were does it go coonected ? Thanks.

garagelu
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all the newer version 2871r have a built in restrictor so you wont need one.

And codyace, explain why the 2871r bolt on turbo for the sr20 is always advertised as the hks gt-rs turbo copy. The specs look basically the same to me.

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hugogos22
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Hey codyace i got the circuitsport lines i dont know if that would have one as well.

codyace
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hugogos22 wrote:Hey codyace thanks for the reply does this garret have a built in oil restrictor ? Which one would i use and were does it go coonected ? Thanks.
The restrictor would screw into the feed of the turbo, and your line into that (usually a -2 or -3 line)
garagelu wrote:all the newer version 2871r have a built in restrictor so you wont need one.
I still don't trust that silly thing. For another 8 bucks I know for sure....not sure if thats the right way to think, but we've yet to get a definite answer if that built in thing is a restrictor or just a oil spray pattern piece (to 'mist' oil onto the shaft)

As far as the circuit sport lines are concerend, I'm not sure with them. Can you post me a link? As long as the feed line has the same -#AN fitting as the restictor, it will work.
garagelu wrote:And codyace, explain why the 2871r bolt on turbo for the sr20 is always advertised as the hks gt-rs turbo copy. The specs look basically the same to me.
I'm not sure at all why and or where you have seen that.

For the longest time the HKS GTRS didn't really have a direct Garrett Copy (dispite being garrett)....now it does in teh 2835

The 2871r .64 and .86 are actually evolutions of the GT28RS (Disco potato). Upgraded turbine and compressor housings, but retaining the same wheel on the turbine side. This helped create a turbo with equal spool, but much more top end.

It has been rumored that the 2871r turbo was in fact a rally turbo of 5-7 years ago before the tr30r came out.


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Tx-Sx-FS
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do all T28 turbos have internal oil restrictor?? i know my T25 doesnt so i installed one in line..but what about the T28 version? TIA

codyace
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Tx-Sx-FS wrote:do all T28 turbos have internal oil restrictor?? i know my T25 doesnt so i installed one in line..but what about the T28 version? TIA
NO OEM Nissan turbos do.

DrifterProdigy85
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codyace wrote:Yes. http://www.atpturbo.com sells them, for ball bearing turbos

And FWIW: It's not a copy of the HKS GTRS at all. the GTRS HKS is closely related to the 2835.
GT2871R w/ GT28R Style Housing is the same or closely related to the HKS GT-RS. http://www.hksusa.com/products/?id=1672 ... ha...e=GRT

matalic sr
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no you will not need a restricter. i have one garrett gt2871R on my sr and its great. flow is good

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Tx-Sx-FS
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would a restrtictor be needt on KAT setup with T28?

codyace
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Tx-Sx-FS wrote:would a restrtictor be needt on KAT setup with T28?
Yes. All turbo setups require them.
DrifterProdigy85 wrote:
GT2871R w/ GT28R Style Housing is the same or closely related to the HKS GT-RS. http://www.hksusa.com/products/?id=1672 ... ha...e=GRT
The thing is, the turbine wheel difference is a HUGE difference.

CRESCENDO
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Codyace, real quick (shoot me an e-mail if you'd like), but...

To your knowledge, will I loose much power (up top I assume, if any) with the 771847 - 1 (GT2871 RS-style) compared to the turbo you run?

-J

codyace
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Upon studying the two graphs, it would seem to me that the top end would be nearly the same, with mayb eonly a 100-200 rpm difference in spool (in favor of the tradtional 3" inlet)

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hugogos22
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Hey codyace would you use greddy manifold and s3 on my setup.

codyace
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Thats what I have on mine :D

Some argue that the stock manifold may comliment the lower end of the gt2871 and the s3's, however I don't find myself really below 3500/4k on track anyway, so to me, the gains of the greddy manifold in the upper midrange and top end, make the most sense.

I can't claim that my car is the fastest or the most powerful, but it's lightning quick on track....the 25-100 sprints are damn fun.

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hugogos22
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Hey codyace your the man ! I copied your setup quick question maybe you can help me on this one. my car is breaking up when i start to hit boost what could this be it idles fine and drives perfect until i hit boost

codyace
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Timing

Knock Sensor

Vacuum leaks per chance...

could be a ton of things really....hard to say ya know?

CRESCENDO
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codyace wrote:Upon studying the two graphs, it would seem to me that the top end would be nearly the same, with mayb eonly a 100-200 rpm difference in spool (in favor of the tradtional 3" inlet)
I just noticed there are 2 versions available for our motors. I'm not the best at reading the comp maps. Other than the 771847 - 1, there is also the 472560-15 listed. What's your take on either, Codyace?

codyace
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743347- 2 Is what I have. Nice 3" intake etc etc.

707160 - 10 seems to be a direct replcament for a Skyline setup...not to say this wouldn't work on our cars, it's just listed for that application

472560 - 15 doesn't come with an actuator

771847 - 1 does come with one.

Both of these turbos have the same exact compressor maps, turbine maps, and specs. To me the only difference being that actuator....

CRESCENDO
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codyace wrote:743347- 2 Is what I have. Nice 3" intake etc etc.

707160 - 10 seems to be a direct replcament for a Skyline setup...not to say this wouldn't work on our cars, it's just listed for that application

472560 - 15 doesn't come with an actuator

771847 - 1 does come with one.

Both of these turbos have the same exact compressor maps, turbine maps, and specs. To me the only difference being that actuator....
Is the Garrett actuator worth it or is the HKS actuator preferred?

Thanks again bro-J

codyace
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CRESCENDO wrote:Is the Garrett actuator worth it or is the HKS actuator preferred?

Thanks again bro-J
Both will work just fine, and both will require modification to make it work in our application. I'd just say get the HKS unit the first time around ya know? That's not to say the Garrett one won't be good either


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