Gt3071r or Gt2876r

Q&A regarding engines, turbos, and intercoolers and power upgrades

Gt3071r or Gt2876r

Postby Empiremen » Thu Mar 05, 2015 6:14 pm

Hi guys,

I'm looking to change my turbo and I was wondering wich one of both Gt3071r or Gt2876r would be better for my use on a St205.

My goal is 350hp or 300whp on the long run and I'm looking really for like an weekend warrior. Kinda civilised in daily drive and kinda fun on the track. I want my boost at 3250 aprox and able to keep up until 6500 rpm and I'm planing to boost at 18psi right now and maybe a bit more in the future.

If you have any suggestion, I'm quite open but I would really like to stay in the Garrett family since I have good deals on them.
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Re: Gt3071r or Gt2876r

Postby aus jd 2703 » Thu Mar 05, 2015 9:38 pm

I have a gtx2876r and it holds 20psi to 7500, but im only making 260awhp... I suspect the mapping is very conservative.

its a lot laggier than I expected or should be. so if were you id go the 3071.
ill report back if I work out why my car is so laggy and low on hp....
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Re: Gt3071r or Gt2876r

Postby Empiremen » Thu Mar 05, 2015 10:04 pm

Mmmhh interesting. It's pretty strange since you have a GTX! And are you still running with the stock ECU?
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Re: Gt3071r or Gt2876r

Postby mx6er2587 » Thu Mar 05, 2015 11:50 pm

I run a gt3076 with a a T25 sized exhaust housing. Spools quick and makes good power. A bit restrictive on the top end.

If you're looking for 300 at the wheels I would go for a gt30 over the gt28
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Re: Gt3071r or Gt2876r

Postby aus jd 2703 » Fri Mar 06, 2015 1:39 am

haltech ps1000
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Re: Gt3071r or Gt2876r

Postby Empiremen » Fri Mar 06, 2015 11:51 am

Alright thanks everyone!
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Re: Gt3071r or Gt2876r

Postby black88alltrac » Wed Apr 15, 2015 4:44 am

gt3076r with .63a/r t3 housing 400hp on 18psi all day long
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Re: Gt3071r or Gt2876r

Postby mx6er2587 » Wed Apr 15, 2015 2:48 pm

400 at the wheels or crank? Based on my own build I would guess a gt3076R would give you close to 300awhp at 18 psi. So about 400 crank. I don't think you could get near 400 at the wheels with 3076 without running 30 psi.
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Re: Gt3071r or Gt2876r

Postby klue » Thu Apr 16, 2015 1:49 am

gtx2876 should have you in that range, gt30 frame will do the same but with less boost

MSG me if you need any pricing. I sell all the options, polished housings, Tial SS exhaust sides and all the side dishes
blow off valves, wastegates oil line kits :)
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Re: Gt3071r or Gt2876r

Postby Empiremen » Thu Apr 16, 2015 8:51 am

Right now, I'm waiting for a Gt2871r! Of friend of mine have good price with Garrett But, if I need anything like blowoff valve or anything, I will MSG you!
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Re: Gt3071r or Gt2876r

Postby klue » Fri Apr 17, 2015 2:20 am

Empiremen wrote:Right now, I'm waiting for a Gt2871r! Of friend of mine have good price with Garrett But, if I need anything like blowoff valve or anything, I will MSG you!



good choice! cheers man
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Re: Gt3071r or Gt2876r

Postby black88alltrac » Wed Apr 22, 2015 7:19 am

2871 and 2876 are horrible matches, too big a compressor for the exhaust wheel and worse housing that will choke up top, 2876 is also what was called gt2540r when it first came out, it's a terrible turbo. why would you match a compressor so big with such a small exhaust wheel, there is a reason the gt3076 is so much better and the efficiency rating is much higher on garrets website. i have more experience with turning mr2s than celicas but 400whp is normal for 18psi and pump gas on dynojet, this is my first celica, after a road trip to alaska i will probably put a 6266 on my st165 like i did for my mr2.
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