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Old 02-21-2009, 09:53 AM   #1
Gigabelova
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Default GT2860RS owners: what are your whp/wtq?

Hi, I haven't seen many Garrett GT2860RS owners with proven power here. I'd like to know from those of you who had run it and those who still do, what were your power/mod goals and did you achieve it? Were you satisfied with it? What was good/bad? I'm only looking for real life experience here. Not theories.
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Old 02-21-2009, 12:36 PM   #2
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How small would that be?
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Old 02-21-2009, 02:09 PM   #3
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I would also like to know
There must be a fair number of hks gtrs kits on here as well
I have seen 335whp at 2.2bar absolute on approx 98 octane fuel
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Old 02-21-2009, 02:22 PM   #4
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Smaller than an 18G I believe, at most the same size. One of the smaller GT28's.
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Old 02-21-2009, 02:29 PM   #5
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A GT2860RS is a waste of time on a Subaru. It's only a 36 lb/min compressor which is basically the same size as a VF39/43 etc... Why bother going to the expense and effort to make a GT2860RS fit when it doesn't do anything more than a stock turbo?

I have installed and tuned GT2860RS's on smaller displacement cars (1.5-1.6L) and it is fantastic in those applications. For even a 2.0L WRX, it's not substantive enough an upgrade to warrant the cost. On a 2.5L WRX/STi there is no point whatsoever.

Last edited by socalLGT; 02-22-2009 at 01:15 AM.
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Old 02-21-2009, 10:54 PM   #6
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the gt28 is better for smaller disp engines like the b-series and SR20s
my friend runs one in his b18c@ 12psi and puts down about 270whp on a dynojet
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Old 02-22-2009, 03:02 AM   #7
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Hmm, would the dual ball bearing construction help with spool compared to the VF39/43/48?
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Old 02-22-2009, 04:30 AM   #8
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Quote:
Originally Posted by socalLGT View Post
A GT2860RS is a waste of time on a Subaru. It's only a 36 lb/min compressor which is basically the same size as a VF39/43 etc... Why bother going to the expense and effort to make a GT2860RS fit when it doesn't do anything more than a stock turbo?

I have installed and tuned GT2860RS's on smaller displacement cars (1.5-1.6L) and it is fantastic in those applications. For even a 2.0L WRX, it's not substantive enough an upgrade to warrant the cost. On a 2.5L WRX/STi there is no point whatsoever.
I agree. You would be crazy to consider a setup with this turbo.
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Old 02-22-2009, 02:27 PM   #9
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i have a gt2876 rotated kit.
perrin fmic custom piped
custom big maf cai
pe 850's
and all other supporting mods dont want to get into the list but my car put down 325whp and 335wtq on 91 oct. @ 20psi on MUSTANG DYNO. the setup is actually great i wouldent say it was a waste of time at all. my car stage 2 on the same dyno put down 276whp and 293wtq on 91 oct @ 18psi. i also had an externally gated 20g setup on the car which on the same dyno made 303whp and 357wtq @ 20psi on the same dyno. so i lost wtq but gaind whp with the setup.just a few things to compare it with . so it is quite an upgrade from stock. the setup is great for street and the track with almost zero lag and spool like the stock vf39. i love the setup. but i do want more power and will be upgrading to a gt3076 soon or maybe even a 35r.but over all it is a great turbo.
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Old 02-22-2009, 03:39 PM   #10
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Quote:
Originally Posted by team trucha racing View Post
i have a gt2876 rotated kit.
perrin fmic custom piped
custom big maf cai
pe 850's
and all other supporting mods dont want to get into the list but my car put down 325whp and 335wtq on 91 oct. @ 20psi on MUSTANG DYNO. the setup is actually great i wouldent say it was a waste of time at all. my car stage 2 on the same dyno put down 276whp and 293wtq on 91 oct @ 18psi. i also had an externally gated 20g setup on the car which on the same dyno made 303whp and 357wtq @ 20psi on the same dyno. so i lost wtq but gaind whp with the setup.just a few things to compare it with . so it is quite an upgrade from stock. the setup is great for street and the track with almost zero lag and spool like the stock vf39. i love the setup. but i do want more power and will be upgrading to a gt3076 soon or maybe even a 35r.but over all it is a great turbo.
Not at all the same. You have a GT2876. The OP asked about a GT2860RS. The GT2876 has a 48lb/min compressor. The GT2860RS has a 36lb/min compressor. The GT2876R has an appropriately sized compressor for a Subaru upgrade turbo, however the turbine is undersized. Gives you good spool but with a disproportionately large hit to the top end. In that size class a GT3071R is a better match. The GT2860RS is way to small to be considered a good option as an upgrade turbo.
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Old 02-22-2009, 05:08 PM   #11
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i know that the turbos are not the same but is a gt28 so decided to give him my info.
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Old 02-22-2009, 07:49 PM   #12
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Quote:
Originally Posted by socalLGT View Post
Not at all the same. You have a GT2876. The OP asked about a GT2860RS. The GT2876 has a 48lb/min compressor. The GT2860RS has a 36lb/min compressor. The GT2876R has an appropriately sized compressor for a Subaru upgrade turbo, however the turbine is undersized. Gives you good spool but with a disproportionately large hit to the top end. In that size class a GT3071R is a better match. The GT2860RS is way to small to be considered a good option as an upgrade turbo.
Well said. Not to threadjack, but do you have any opinion on the HTA GT3076R vs. the original 3076?
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Old 02-22-2009, 08:51 PM   #13
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Well said. Not to threadjack, but do you have any opinion on the HTA GT3076R vs. the original 3076?
Call me an old stick in the mud, but for the most part I like staying with straight Garrett parts. I really don't buy too much in to the hype from the HTA or other billet wheels. You can't beat or replicate the precision assembly tolerances you get on turbos straight from Garrett. The new billet wheels seem to work pretty well though and could suit your needs if the flow capabilities line up well with what you want.
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Old 02-23-2009, 01:41 AM   #14
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Nice! Thank you very much.
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Old 02-23-2009, 03:32 AM   #15
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The GT2860RS was sent to me FOC. It bolts on. Wouldn't this be an upgrade from the TD04-13L in the 03 WRX? I thought it was a better turbo than the VF39 since it should spool sooner and not to mention, it is a Garrett.
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Old 02-23-2009, 04:30 PM   #16
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Quote:
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It bolts on.
you sure about that?
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Old 02-23-2009, 05:56 PM   #17
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Quote:
Originally Posted by Gigabelova View Post
The GT2860RS was sent to me FOC. It bolts on. Wouldn't this be an upgrade from the TD04-13L in the 03 WRX? I thought it was a better turbo than the VF39 since it should spool sooner and not to mention, it is a Garrett.
yes it would be an upgrade to the td04.

if it bolts up then slap it in.....does it have the right flanges to bolt up?
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Old 02-23-2009, 07:48 PM   #18
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I am running a APS SR40 which I believe is a GT2871. I put down 322whp and 355tq on a Mustang Dyno with meth and a TMIC which would probably be good for 350whp and 385wtq on a Dynojet. Excellent spool (full boost at 3300rpm) and decent top end.
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Old 02-24-2009, 10:45 AM   #19
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I ran the HKS GTRS on my hybrid for a season. It made 330whp and 400wtq on a Dyno Dynamics Dyno, and ran a best of 12.01 @ 115.86mph running 2bar of boost on 94 octane.
Great turbo for autox! Full spool almost the same as stock!
Just didn't have the top end I was looking for...
Either did the APS TSR 70 with 1.06 hotside thats comin off the car SOON
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Old 02-25-2009, 11:28 AM   #20
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yes it would be an upgrade to the td04.

if it bolts up then slap it in.....does it have the right flanges to bolt up?
Yup. It was built in limited quantities by AVO to gauge interest. However, not many people knew about it so they stopped making it. I could take pictures but I am too lazy to get to the garage (which is not where I live btw) and post them.

I just got them to review some time ago, but never did it.
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Old 02-25-2009, 11:37 AM   #21
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hmm, well throw it in. you're absolutely gonna need injectors and i'd also recommend a 3 port boost solenoid, fuel pump, and a bigger TMIC.
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Old 02-25-2009, 11:47 AM   #22
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That goes without saying. I've got enough spare parts to put into this.
Fuel Pump: Walbro 255
Fuel Regulator: Aeromotive FPR
Injectors: Spec C Pinks 565cc
Boost Solenoid: Stock
TMIC: JDM Spec C STi intercooler
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Old 02-25-2009, 11:54 AM   #23
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get this too...$90

http://forums.nasioc.com/forums/show....php?t=1701710

the stock boost solenoid on the older wrx's is crap if you start going over 18psi. the boost oscillations are annoying.
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Old 02-25-2009, 11:59 AM   #24
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Quote:
Originally Posted by Gigabelova View Post
Yup. It was built in limited quantities by AVO to gauge interest. However, not many people knew about it so they stopped making it. I could take pictures but I am too lazy to get to the garage (which is not where I live btw) and post them.

I just got them to review some time ago, but never did it.
wow. what did they call it, avo250?
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Old 02-27-2009, 11:59 AM   #25
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Thank you Phatron. Seeing as how we want to save money on this project we will probably stick to the stock solenoid for now and run 16-17 psi max boost. As for the name I do not remember. All I knew was it was a prototype unit made from AVO and they did not bring it to sale. In fact if I remember correctly, there was a Vishnu WRX that had it. The GT2860RS is also known as the Disco Potato. If you still want to buy one I know ATP makes one. Here is a link:

http://www.atpturbo.com/Merchant2/me...egory_Code=SUB
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