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Old 09-19-2010, 10:59 AM   #1
insaners
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Default T3/04 Turbo or Greddy TD06-25G?????

Which turbo is a better setup? I currently have the T3/04 on my car but I have a 25G just laying around. Any info helps!!

Thanks
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Old 09-19-2010, 10:41 PM   #2
seanathanq83
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i have seen some people make great power with the 25g
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Old 09-20-2010, 04:29 PM   #3
arghx7
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uh which T3/T4? That tells us nothing... there are a bazillinon T3/T4's out there. Is it a T04E 57 trim? T04E 60 trim? T04E 50 trim? 60-1? what are the A/R's of the housings? what turbine wheel?
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Old 09-20-2010, 04:44 PM   #4
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Quote:
Originally Posted by arghx7 View Post
uh which T3/T4? That tells us nothing... there are a bazillinon T3/T4's out there. Is it a T04E 57 trim? T04E 60 trim? T04E 50 trim? 60-1? what are the A/R's of the housings? what turbine wheel?

What he said!

Also what motor are you running, how import is spool and the turbos ability to keep efficient up top.
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Old 09-20-2010, 10:47 PM   #5
insaners
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This is what I am running~

Motor:

-Flipped intake manifold
-EJ257 shortblock w/stock EJ25 heads and cam (CR = 8.4:1)
-TWE titanium valve springs and retainers
-Cometic metal headgasket
-Stage 3 clutch
-ACT Lightened Flywheel -Vishnu fuel rails; stainless A/N braided fuel lines in parallel configuration
-Aeromotive FPR 
-Walbro 255 LPH fuel pump
-Unorthodox Racing lightweight crank pulley
-Rochester/Siemens 760cc fuel injectors
-NGK cold plugs
-Royal Purple 10W-30 every 3500-4000 miles.



Turbo Setup:

-Custom turbo kit by CTC Motorsports: 2.25” uppipe (custom made) / 3” downpipe
-Precision Turbo SC34: 53 lb/hr, T3/T04S hyrbid
-TiAL 44mm external wastegate with 11 lb. spring
-HKS SS BOV
-Borla Hush 3" Full Exhaust
-Black MRT FMIC – custom fit for RS.
-DC sport style headers



Electronics:

-Hydra EMS -HKS EVC IV Silver boost controller

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Old 09-21-2010, 06:34 AM   #6
domestic_abuser
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The 25G is really made for a 2.0 motor due to the small hotside. Greddy offers the kit to EVO owners with a 10cm hot side and Subie owners with a 8cm hot side, unless you order it from Greddy with the bigger hotside, which is very expensive like all other Greddy ****. Most likely you'll make decent peak power, but long before you end out of rpms.
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Old 09-21-2010, 11:20 AM   #7
fastnoypi
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Originally Posted by domestic_abuser View Post
The 25G is really made for a 2.0 motor due to the small hotside. Greddy offers the kit to EVO owners with a 10cm hot side and Subie owners with a 8cm hot side, unless you order it from Greddy with the bigger hotside, which is very expensive like all other Greddy ****. Most likely you'll make decent peak power, but long before you end out of rpms.
The earlier marketing stated it was for the USDM 2.5L or ej207 variants.
I wanted one of these at one time but its such a pain in the ass to order the kit already supplied with the 10cm hotside from the vendors. I would guess power-wise it would be 30R type power. Pricing out of the box isn't all that bad because its inclusive of the wastegate and intake BUT you need to fab IC pipes.
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Old 09-21-2010, 12:08 PM   #8
insaners
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I took the Greddy turbo kit off of a 07 STI I am selling. Maybe it already has the 10cm hot side . I am getting 299hp and 330tq @ 14lbs out of my t3/04 setup.
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Old 09-21-2010, 07:34 PM   #9
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Old 09-21-2010, 07:49 PM   #10
domestic_abuser
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Quote:
Originally Posted by fastnoypi View Post
The earlier marketing stated it was for the USDM 2.5L or ej207 variants.
I wanted one of these at one time but its such a pain in the ass to order the kit already supplied with the 10cm hotside from the vendors. I would guess power-wise it would be 30R type power. Pricing out of the box isn't all that bad because its inclusive of the wastegate and intake BUT you need to fab IC pipes.
Yeah but having to use the weird ass Greddy up pipe adapter is one down side, unless a custom up pipe is fabbed. Also the turbo uses a 3 bolt hotside more common to Nissan's which is another pain in the ass because of the way that most turbo set ups are today. (either 4 bolt or v band, you could always have a custom v band down pipe made and have one welded to the turbo. That could make things easier later on if you feel like up grading.)


Quote:
Originally Posted by insaners View Post
I took the Greddy turbo kit off of a 07 STI I am selling. Maybe it already has the 10cm hot side . I am getting 299hp and 330tq @ 14lbs out of my t3/04 setup.
To me it sounds like you have the T04E which is a 20G sized turbo, I have a T04S (SC61) with 100mm intake and .82 hotside. Mines more or less a 60-1, if I were you I'd move up to this turbo. You'll make more or less 35R, but have the downside of a journal bearing turbo...

Then again only running 14lbs might be your issue, have you thought of being retuned for a more aggressive map?
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Old 09-22-2010, 01:34 AM   #11
fastnoypi
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Quote:
Originally Posted by domestic_abuser View Post
Yeah but having to use the weird ass Greddy up pipe adapter is one down side, unless a custom up pipe is fabbed. Also the turbo uses a 3 bolt hotside more common to Nissan's which is another pain in the ass because of the way that most turbo set ups are today. (either 4 bolt or v band, you could always have a custom v band down pipe made and have one welded to the turbo. That could make things easier later on if you feel like up grading.)
i forgot , the uppipe and downpipe are included in the Greddy kit.
V-band downpipes, IMO make things easier for removal and service but not for upgrading, you're limited to small number of true v-band hotside offerings
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Old 09-22-2010, 01:50 AM   #12
insaners
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Quote:
Originally Posted by domestic_abuser View Post
Yeah but having to use the weird ass Greddy up pipe adapter is one down side, unless a custom up pipe is fabbed. Also the turbo uses a 3 bolt hotside more common to Nissan's which is another pain in the ass because of the way that most turbo set ups are today. (either 4 bolt or v band, you could always have a custom v band down pipe made and have one welded to the turbo. That could make things easier later on if you feel like up grading.)




To me it sounds like you have the T04E which is a 20G sized turbo, I have a T04S (SC61) with 100mm intake and .82 hotside. Mines more or less a 60-1, if I were you I'd move up to this turbo. You'll make more or less 35R, but have the downside of a journal bearing turbo...

Then again only running 14lbs might be your issue, have you thought of being retuned for a more aggressive map?
Yeah I need to retune it for sure! What is the max boost I can run on my setup safely?
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Old 09-22-2010, 01:56 AM   #13
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Are there numbers on the hot side to tell me if its a 8cm or 10cm?
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Old 09-22-2010, 02:28 AM   #14
domestic_abuser
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Quote:
Originally Posted by fastnoypi View Post
i forgot , the uppipe and downpipe are included in the Greddy kit.
V-band downpipes, IMO make things easier for removal and service but not for upgrading, you're limited to small number of true v-band hotside offerings
I have a custom 3'' v band welded to the back of my TO4S, that is what I was suggesting. As far as I know Tial offers a .63, .82. and 1.06 for sure.

Quote:
Originally Posted by insaners View Post
Are there numbers on the hot side to tell me if its a 8cm or 10cm?
Measure it, most likely it's the 8cm for the standard subie kit. Not many people know we get screwed out of the larger hotside. Also the downpipe is only like a 2.75 unless the guy made a custom one. The kit comes with the JDM downpipe and it's actually to short for our cars and needs to be extended a bit. So he either did the right thing and made a true 3'' or just made the JDM piece a bit longer. If you run this turbo I recommend getting a custom up pipe made to rid you of the adapter Greddy sends in the kit. It's kind of a ****ty set up for a good turbo.
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