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Old 07-27-2018, 09:34 AM   #26
Bansheeboy11
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Im holding off for a non-gated divded T3 as i have some manifold pieces already made for the car, it wont have the motor in it until winter so im not in a rush.
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Old 07-27-2018, 09:37 AM   #27
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Im not in rush too. But that's the only TS option for now. A divided V-band would be nice too!
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Old 08-25-2018, 01:19 PM   #28
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Old 08-28-2018, 08:35 AM   #29
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Quote:
Originally Posted by Titter View Post


oddly enough this came across my FB feed today so i figure i would share it.

red is a g25-660
blue is a gtx3076

its on an 04 australian sti so i believe that is an EJ207. figures are in KW not HP.

you got about 10psi at about 4000rpm and 30psi at about 4900rpm

the extra volume of a 2.5L would make this turbo come alive a bit earlier.
Thanks for sharing, but this picture is a piece of sh**.
Don't get me wrong, 330 kW is plausible, but 1051 Nm @ 5084 rpm?
The most basic formula every car guy should know doesn't comply:
P = 2 * Pi * M * n
n = rps
M = torque in Nm
P = Power in W
Pi = 3,1416....

1051 Nm @ 5084 rpm would mean 560 kW @ 5084 rpm. Yeah, right..

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Old 08-28-2018, 09:07 AM   #30
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Yeah, for those using standard units, 1051Nm = 775 ft-lb

Makes me wonder if that's a loading on the dyno arm or something. You'll see if gives motive forces too. Seems quite odd to be on the graph, but you can see RPM is derived from MPH and thus why there is no torque curve plotted.

Aside from that, you can see the power values (430 whp and 440 whp) are pretty believable for the boost levels.

So taking that as it is, and seeing the G25-660 is getting a bit more boost, you can assume peak power figured are comparable to the GTX3076. The spool however is the star of this show. Same torque are roughly 250 RPM sooner...assuming all else is the same.

Does anyone know the weight comparison between the two turbos?
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Old 08-28-2018, 09:36 AM   #31
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"standard-units"
Thanks for your reply, i found the full graph here:

https://www.facebook.com/photo.php?f...type=3&theater

They didn't even wrote his name right.
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Old 08-28-2018, 10:45 AM   #32
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Quote:
Originally Posted by sangreal View Post
"standard-units"
They are referred to as Standard and Metric...so it's safe to say you're not from the US or the UK.

Sometimes they go by empirical units as well.

I'm used to using Nm and kW from my time at Volvo Powertrain, just good at flipping back and forth. It was always funny watching the Europeans pound their heads in the sand when they had to do conversions.
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Old 09-01-2018, 08:31 PM   #33
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Medieval units.
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Old 04-11-2019, 01:23 PM   #34
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Default I want to fit the G25 660 in stock location

Quote:
Originally Posted by Daggernomad55555 View Post
Check this Garrett part number 877895-5012S. It's a T4 divided .92 AR IWG turbine housing. I am looking for this exact turbine with my twin scroll headers on a 2.0L
I have an eventual goal of fitting the G25 660 IWG in Stock Location so that it works with my Verticooler (Top Mount) and Grimmspeed intake

I am using the JDM Twin Scroll headers and Up Pipe (VF37 style) setup currently.

What is the most economical way I can fit the G25 660 IWG in stock location?

I am a little clueless when it comes to fitting Garrett Turbos, can somebody teach/advise me please.

I was thinking:

Twin Scroll to Divided T4 Up Pipe in Stock Location
(is this possible? how and where can I get this up pipe?)

Last edited by PrinceVegeta; 04-11-2019 at 01:34 PM.
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Old 04-11-2019, 03:52 PM   #35
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Quote:
Originally Posted by PrinceVegeta View Post
I have an eventual goal of fitting the G25 660 IWG in Stock Location so that it works with my Verticooler (Top Mount) and Grimmspeed intake

I am using the JDM Twin Scroll headers and Up Pipe (VF37 style) setup currently.

What is the most economical way I can fit the G25 660 IWG in stock location?

I am a little clueless when it comes to fitting Garrett Turbos, can somebody teach/advise me please.

I was thinking:

Twin Scroll to Divided T4 Up Pipe in Stock Location
(is this possible? how and where can I get this up pipe?)
Probably the closest to stock location will be Killer B's Spoolinator...not their current one, but they have posted not too long ago about a new kit for the G Series turbos. I don't believe there are TS housings for the G Series turbos.

Quote:
Originally Posted by KillerBMotorsport View Post
Just to keep things interesting... Something we're working on, Garrett G-Series Spoolinator.





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Old 04-13-2019, 11:50 PM   #36
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Old 04-14-2019, 12:17 PM   #37
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Quote:
Originally Posted by PrinceVegeta View Post
Killerbee I think said there are fitment issues
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Old 04-16-2019, 09:57 AM   #38
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ATP has a non-divided T3 housing, im still holding out for a divided T3 housing as i have a nifty little piece from killer B that i want to use.
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Old 04-16-2019, 04:55 PM   #39
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ATP seems like the sort to release a stock-location version. I still have their stock-location GT3076, and would consider this thing if they can make it work.
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Old 04-22-2019, 09:01 PM   #40
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Quote:
Originally Posted by NSFW View Post
ATP seems like the sort to release a stock-location version. I still have their stock-location GT3076, and would consider this thing if they can make it work.
I just recieved an email from ATP today and it's in the works. No ETA yet. I'm only interested in a stock location and also plan on the 550 instead of the 660. Could change my mind later since I'm not there yet.
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Old 04-22-2019, 11:40 PM   #41
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Cool, I look forward to see results. If the 660 will give more power and come on just as soon as my current turbo, I'm going to be very tempted.

From the naming of the 550 and 660, I was assuming they'd be 55 and 66 lb/min, but I looked at the compressor maps last night, and they actually max out around 49 and 59.

My old-school GT3076 is 52 for comparison. It made 377whp with a stock longblock. Full boost (22psi) at 4000 RPM in 3rd gear.
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Old 04-23-2019, 12:21 AM   #42
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No, actually the 550 and 660 refer to max HP. A variety of trims, A/R's, etc are available under that p/n. Check out the Garrett site, try the calculator, and review the sample calcs.

https://www.garrettmotion.com/racing...mance-catalog/

FYI, the intercooler cores made by Garrett are excellent. All core are not created equal and Garrett's cores use the best materials, fin designs, and brazing process. Their cores and intercoolers have been used by AMG, Ford SVT, CAT, Kenworth, etc. Unfortunately I don't believe they have a core the right size for TMIC's and custom sizes are not available. At least they haven't been in the past.
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Old 04-23-2019, 01:08 AM   #43
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I knew that was supposed to be crank hp, but as I recall the rule-of-thumb was 10 chp per lb/min of air - and even that still seemed a bit optimistic for Subaru engines.
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Old 04-27-2019, 04:01 AM   #44
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Who is able to fab a stock location Twin Scroll T4 Up Pipe so that I can fit the G25 660 T4 Divided in stock location?
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Old 05-13-2019, 03:43 AM   #45
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Anyone ?
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Old 05-13-2019, 12:31 PM   #46
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Quote:
Originally Posted by PrinceVegeta View Post
Anyone ?
Possibly these guys? http://rocksteadytuning.com
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Old 05-19-2019, 08:31 PM   #47
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Looking to replace my POS Precision 5558 this might be an option.
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Old 05-24-2019, 09:35 AM   #48
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Quick update, got up to 440wtq and 461whp at 65% Ethanol tune last week on my 2.35 @ 25 psi. Looks like that turbo could do 500whp with stage 2 cams, higher fuel pressure and bit more boost.
https://forums.nasioc.com/forums/sho...2883288&page=2
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Old 06-22-2019, 09:57 AM   #49
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Old 10-02-2020, 09:50 AM   #50
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Sorry for bumping an old thread as it doesn't seem like there is much info on this turbo.


Does anyone know if this will work in the stock location? Looking for around 400whp on 93. I know I may not hit it with this turbo, but that is OK.
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