LuckyX2

I haven't seen anyone online preparing to dyno except boostfreak27 here... I'm not just talking sr20's either, I mean, this is the ONLY one I've found being tested on any engine. The closest I've gotten is gtx3071 to gt3071 dynos and then extrapolating to how a gtx2867 and gt2871 would compare.

On a side note, have any of you guys seen this here?

ATP is offering a gt28xx upgrade for to a gtx2867 for only 300 bucks!
Used gt2871's go for what, $800-900? So let's say I sold my gt2871 to buy a gtx2867 new with exhaust housing which costs around $1400 for group buys, $1600 for individuals so that would run me anywhere from $500-800 to upgrade vs $300 to have ATP modify it?

Depending on what they actually do to make it into a gtx2867, this could be a great value. I would not mind paying $300 bucks to have what theoretically should be more responsive and run an extra 2-4psi just as efficiently as my gt2871. Is anyone familiar with ATP's upgrade? Would I really be winding up with exactly a gtx2867 or is it more like an approximation? I think I might be calling them soon...

codyace

That 300 dollar upgrade is only in reference to a new order that traditionally comes with a GT vs a GTX. It's not a trade in deal. You do save 100 bucks or so in the end. so not bad.


With that said, I'd be dynoing this setup right now if it wasn't for ATP buying up all of the initial stuff and whoring it out to their customers/shops...and my supplier not having them yet.

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LuckyX2

Ah, I see it now, "Upgrade Charge, on the same order placed".

Damn, I thought it was a trade in and I was about to jump right on that...

Can't wait to see your work with this turbo once you get one btw.
Hopefully you'll set the bar high for this like you did for gt2871's.

Conrad 2NR

Would the stock mani still be his choice of mani for a GTX2867 though, that's what I'm wondering or would we see interest in the development of an aftermarket T2 twinscroll with external gate.

Would love to see if the GTX2867 has boost creep issues like the 2871R.


Aaaargh, and I was contemplating GT2871R vs saving much longer and springing for a T3 GT3071R.

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codyace

I still think stock will be the manifold of choice as it uses the same turbine housing and a similar wheel. In the case of these little turbos, heat retention is king, and what makes them light so fast. Tubular manifolds won't increase response at all especially on a non divided housing.

In regard to to creep issues, I still think those issues will be there, as (again) you're using the same turbine housing with the setup.

Truthfully, this turbo is shaping up to be the new turbo of choice for those wanting to make 425-450 whp in their 240's at the limits of pump gas.

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Kingtal0n

My father's car is a GT2876 84 On a full-race bottom mount T-25 flange
its dressed with pistons rods cams and a D-jetro.
He is happy with it at 13psi the lowest boost setting (probably around 300 horsepower) but as we all know that turbo can do much more. I am interested now in turning it up (twist the knob on a dyno) and finding out where the compressor taps. Something else to compare with? I am also curious about the creep, or lack thereof.
Its just hard to get him to turn up the boost. "but why? its already faster than anything I've found...."

codyace

I don't have much 2876 experience, but I can easily see 18-20 psi being well within pump gas limits.

In the grand scheme, it will all creep to a degree...that quarter sized hole, and a simple diaphram as are reliable as Lindsay Lohan not drinking for the evening.

As long as the fuel is there, I'd say put boost controller on her, and make him shit his pants

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Def

All my GT turbos on a stock manifold have all BLED PRESSURE DOWN towards redline. None of them creeped up in pressure towards redline. I've been constantly fighting boost drop off at high RPM, to the point that I'm going with an external gate to get more boost at higher RPM as the turbine inlet pressure climbs.

My poor little GT2560R was running a MBC, and it probably completely closed off the boost source to the WG but was still dropping off boost. Going from 18 psi down to 15.5 psi at redline. It still made 300 rwhp for a pretty broad range (due to the boost dropping off), so the little wheel must have been getting close to choking and spinning it's little arse off.

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LuckyX2

I'm with def on this one. That's basically what happened to me with my s15 turbo but it bled down even worse to 14psi. My gt2871 is a lot better but still, definitely no creep.
The inability for the s15 turbo to hold more than 14psi for me was pretty much what made me upgrade to a gt2871.

Seraphim38

The external wastegate T25-EWG-44 .73AR housing is a great fix for this, except on my build I found that the Tial MV-R was about an 1/8th of an inch too long to clear the strut tower/wheel well. My mechanic fabbed a 90 degree elbow (like ATP sells) and it worked out well, but it's a very very tight fit. Not the best pics (I should take more)

PICs:




More pics here at the end of the GT2871R thread:
GT2871 USERS. SR motor

LuckyX2

Any updates boostfreak? I'm curious if you got the injectors straightened out.

boostfreak27

The injector latency is still off, but i was able to get the car running and idling smooth. It actually was an intake problem. I had to lengthen the tube and after that the car was running great! So I believe ill be hitting the dyno tomorrow for my tune!!

LuckyX2

Hmm, never would have guessed it was an intake problem... Well, glad you got it fixed and I can't wait to see the dyno results

boostfreak27

Yeah took forever! Changed the iacv, put all new grounds on the car, checked ecu pinouts, checked injector continuity, even took the power fc to apexi and had it tested, tried a different maf. And after all that, it turned out to be the intake. Im glad it was a simple fix. So i made a "cold air" for it.

Loganpsd

Dyno yet? The suspense is killing me

di-devol

^This

msglngth

LuckyX2

Any updates yet?

ka-turbo

wats the updates on this...the suspense is killing me as well...bought to buy it but wanna know if its worth it!!! vs the gt2871r

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Karcas

BUMP!!!

I too am about to buy a GTX2867. I've had this page open on my phone for like a week and I refresh it a few times everyday.
Hurry up and post results!
I'm strapping this turbo to a bone stock 2010 Focus

inis

I'm waiting as well, mine is going on a zx2 with the zetec. Is the 2010 a duratec? 20 or 23?

Karcas

All the 2gen are 20Dtec

Mr.GT30

I have this turbo in my car and made 364HP on RRE dyno, here is my MOd, stock bottom end, 260 in/ex tomei cams. valve spring, cosworth head gasket, 750 cc tomei injector, 255 walbro fuelpump,Stock intake manifold, CX racing front mount, PFC d-jetro, TUNE BY LOD@ RRE

inis

what psi were you at?

slider2828

and what RPM did full boost kick in? Dynograph would better explain ....

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the555car

Which exhaust manifold? Which turbo housing and A/R? Extrude honed either, like CodyAce's setup?

cheers
-Evan

LuckyX2

Not to be mean, but 364hp? A gt2871 could do that no problem.

I fully appreciate you posting your results but can we get results from someone who pushed it a bit? In the meantime some info like psi and/or a dyno sheet would be great.

And where's boostfreak???

goslow

really wanting to see results from.

Mr.GT30

18psi, full boost about 300 RPM sooner then GT2871, what EX a/r ? = 0.64
as far dyno graph is in ROAD RACE Engineering Dyno computer. when can i post it? not any time soon just because Im super busy during this time around. or you can stop by RRE and they will be happy to show you.

cotbu

If I or anyone was to take you at your word? It would mean that this turbo is not worth the upgrade from a gt2871r.64 56trim. Or your motor hasn't been tuned very well, etc... We need more data, we need better data. 300rpm sooner seems more like someone's read the brochure talk to me.

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huffandpuff00

I searching Garrett's website and catalog for that damn special turbine housing so that I could get PSI (local shop) to order it direct from Garrett. Still never found the part #, but what I did find is a great price on the housing at a place in Kirkland, Washington called wideopentuning.com. This is the lowest I have seen the housing anywhere, only $265 + $20 shipping to me(Oregon)...

They also sell everything ATP but for cheaper if anyone needs flanges or whatnot!

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