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Old 12-14-2015, 12:26 AM   #1
countriccati
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Member#: 402987
Join Date: Oct 2014
Chapter/Region: NESIC
Location: Boston
Vehicle:
2006 Saabaru
PSM

Default Dyno Tune: 2.5L + Blouch 18GXT-R makes 339whp / 321wtq

Event: Dyno pull
Location: Dynotech Tuning, Seekonk, MA
Ambient Temp: ~45 F
Elevation: Don't know
Weather: Sunny

Car: 2006 Saab 9-2x Aero (WRX)
Tuner: Matt Miner
Dyno Info: Mustang
Transmission: 5spd, stock clutch
Gear: 3rd
Peak HP at RPM: 339whp
Peak Torque at RPM: 321wtq
Baseline hp/tq for a stock on same dyno: 06-08 2.5 WRX: 190whp/225wtq
Target Boost: 20
Target AFR: 11:0
Fuel: 93
Relevant Engine/Power Modifications:
Blouch 18GXT-R 10cm^2 hotside
PTP Turbo blanket
ID1000 injectors
DW200
05 STi TMIC
Grimmspeed catted DP
H&S 3" catback
Grimmspeed EBCS
Stock internals, intake, inlet
Driveline Modifications: Stock

Posting this to give a detailed review of the Blouch 18GXT-R, as well as demonstrate how modest power is possible with very few mods. Bottom line: for the retail price, might as well get a Blouch Dom 1.5XT-R. The way this turbo responds is more like a "Dom 1.0" than a conventional 18G, i.e. somewhat slower spool but with more top end.

To be clear, this is not a bad turbo at all--for my limited goals it's great, and the drivability is amazing. It has a Garett ball-bearing CHRA (see pic) with the same compressor dimensions as an 18G, but same turbine dimensions as a Dom 1.5. The tune is also intentionally conservative to preserve the stock drivetrain, rather than aggressively going for max numbers.

According to Matt Miner, this turbo has nearly the same response as the bigger Dom 1.5, which would have more top end. If it was priced better this turbo would be a more compelling choice, but at <$100 difference one might as well get the Dom 1.5 instead.

For comparison, the previous "Stage 2" protune with just the TBE and EBCS on the stock TD04 is shown.

Hopefully this will be of some use for people considering this turbo, as well as those thinking about buying lots of other parts vs. putting that money into a turbo and injectors. The goal for this car is to be a sleeper, including under the hood, where most everything looks stock...because it is.

For more details, the main build thread is here.









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Last edited by countriccati; 12-15-2015 at 04:15 PM.
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Old 12-14-2015, 01:58 AM   #2
Harey
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'15 Foz XT & 02 Foz
EJ207

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Congratulations, good result. What a great comparison dyno to the standard turbo!
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Old 12-14-2015, 02:47 PM   #3
BroBroBroBroBro
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Join Date: Nov 2012
Chapter/Region: E. Canada
Location: Pemeal Bacon
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2011 wrx
12.9 @ 107

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can you post some in car pulls?
would love to see some video :P
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Old 12-14-2015, 03:43 PM   #4
bdubblu
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Join Date: Jul 2010
Chapter/Region: MAIC
Location: Mostly at my home
Vehicle:
2004 WRX Wagon
Stage 5.1.2a.2

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If you don't launch your car, I'd say giv'er 22psi of boost. The stock 5 speed and clutch are up to that task. If you launch or bang gears, then I suppose you might have reason to play it safe.
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Old 12-14-2015, 05:15 PM   #5
Zcypot
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Location: Compton, CA
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2014 WRX Sedan Lmtd
WRB

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Thanks for the info, damn you made me more excited for my future 1.5xtr purchase!

money cant come in quick enough.
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Old 12-14-2015, 08:05 PM   #6
alakazoo22
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Join Date: Nov 2009
Chapter/Region: E. Canada
Location: Sherbrooke
Vehicle:
05 FXT 18GXTR
black

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I have 18g xtr since 4 years now and stock FXT tranny hold power/torque very well.

I'm tune on mustang also, same temp a you and 94 oct. But not the same mods.

348whp/352wtq @ 18 psi 3rd gear
344whp/364wtq @ 18 psi 4 th gear

I've got a retune last summer at 100F instead of 45.. 320/320 @ 18 psi on a dynapack. But I feel more power now than before.

I like this turbo, full boost at 3750 in 4th I this is very good !
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Old 12-15-2015, 04:11 PM   #7
pooster.online
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Chapter/Region: BAIC
Location: Bay Area/ L.A
Vehicle:
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thanks for your post. do you think the 10 cm hotside is the cause of the slower spool? I would have expected this to spool a bit faster than a 20g, but since it is an XTR i'm not sure if its comparable.
The stage 2 is on a vf39 or the like correct?
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Old 12-15-2015, 04:49 PM   #8
Scuby04STi
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Quote:
Originally Posted by alakazoo22 View Post
I have 18g xtr since 4 years now and stock FXT tranny hold power/torque very well.

I'm tune on mustang also, same temp a you and 94 oct. But not the same mods.

348whp/352wtq @ 18 psi 3rd gear
344whp/364wtq @ 18 psi 4 th gear

I've got a retune last summer at 100F instead of 45.. 320/320 @ 18 psi on a dynapack. But I feel more power now than before.

I like this turbo, full boost at 3750 in 4th I this is very good !
It is? I haven't seen a lot of other ones to compare too but my car with a GTX3076 .82 spools similarly, at most a few hundred RPM later.
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Old 12-15-2015, 06:04 PM   #9
Harey
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'15 Foz XT & 02 Foz
EJ207

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Quote:
Originally Posted by pooster.online View Post
The stage 2 is on a vf39 or the like correct?
He mentions it was a TD04 in the first post
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Old 12-15-2015, 06:05 PM   #10
Harey
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EJ207

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Quote:
Originally Posted by Scuby04STi View Post
It is? I haven't seen a lot of other ones to compare too but my car with a GTX3076 .82 spools similarly, at most a few hundred RPM later.
Do you also have a standard exhaust manifold and IWG turbo?
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Old 12-15-2015, 08:22 PM   #11
Scuby04STi
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Quote:
Originally Posted by Harey View Post
Do you also have a standard exhaust manifold and IWG turbo?
Nope, was not under the impression my set-up was anything like this one. Was just surprised there was a comment about how quickly that this car spooled for that turbo. I have not many examples of cars with this turbo and upon first glance thought it was slow to pick up for its frame size.

I was only mentioning my car seeing it moves something like 20lbs/min more yet spools the same. Is this all due to the exhaust/IWG?
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Old 12-15-2015, 11:49 PM   #12
BroBroBroBroBro
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Quote:
Originally Posted by Scuby04STi View Post
Nope, was not under the impression my set-up was anything like this one. Was just surprised there was a comment about how quickly that this car spooled for that turbo. I have not many examples of cars with this turbo and upon first glance thought it was slow to pick up for its frame size.

I was only mentioning my car seeing it moves something like 20lbs/min more yet spools the same. Is this all due to the exhaust/IWG?
This turbo has been given poor reviews years ago. it all depends on your goals as stated above. I would run the 1.5xtr but risk blowing the engine and transmission.

The rotated turbo housings are better and your setup will shine through but people with modest builds dont choose a GTX30 unless they are a little more serious or have the money to commit.
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Old 12-16-2015, 02:41 AM   #13
Scuby04STi
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Quote:
Originally Posted by BroBroBroBroBro View Post
This turbo has been given poor reviews years ago. it all depends on your goals as stated above. I would run the 1.5xtr but risk blowing the engine and transmission.

The rotated turbo housings are better and your setup will shine through but people with modest builds dont choose a GTX30 unless they are a little more serious or have the money to commit.
Good point. I was just unsure about the spool time one this size stock location set-up. I was originally intending to go down a path closer to this than I did seeing I saved up to pay others for work then did my own laybor to get better parts.
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