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Old 05-21-2016, 02:54 AM   #1
psyclobe
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Member#: 395439
Join Date: Jul 2014
Chapter/Region: SCIC
Location: CA, Fresno
Vehicle:
2015 WRX
Crystal Black Silica

Default Psyclobe's go for broke 2015 WRX build thread

Its been a long journey, in late 2014 I picked up a 2015 WRX Base from an Ohio dealership. It was an accidental order from another customer, but I was happy to get one without a stupid sun roof.



Not too long after I began modifying it. Early on the parts for the FA20 were few and far between. I was one of the first to get the ETS turbo back exhaust, and later their ETS intake. On went some Limited STI rims, and then an ETS front mount intercooler, some cheap coil overs, mudflaps, and of course the Cobb Accessport, E Tune, then some pro tunes...

And of course a little upgrade to the stereo, and some carbon fiber interior pieces...





By this point on various dynos I was making close to 300whp on 93, and I was quite happy with the car overall, but then some life changes happened, I moved to California, got divorced, and my engine blew up.



So I was faced with a choice, build her, or park her, and I chose the most financially irresponsible one possible, I built her. I built her strong, and I built her thoroughly, and although I may eventually regret it, here we are..





Complete build list:

Engine:
ETS turbo back exhaust
ETS front mount intercooler
ETS intake
ETS PT5862 turbo kit
TiAL recirc valve
TGV/EGR delete
IAG stage 3 block
DeatschWerks DW300 in tanke fuel pump
Custom headwork, blended bowls, performance valve job
Custom setrab series 6 oil cooler in OEM intercooler location
Fluidampr
Cobb access port E85 pro-tune at GST motorsports
IAG AOG street series

Drivetrain:
Clutch Masters FX800 competition twin disk clutch/flywheel
Rebuilt JDM STI 6MT transmission TY856WB1AA
Perrin 510BK aluminum differential cover
Rallispec long 5th and 6th gears
Cusco tarmac cender differential
Cusco RS LSD front/rear (front 1 way, rear 1.5 way)
PST carbon fiber driveshaft
STI rear axels

Wheels/Brakes/Suspension:
STI rebuilt/powdercoated calipers
Goodrich SS brakelines
Volk TE37SL 18x9.5+40 wearing Bridgestone RE-11
Cusco rear trailing/control arms
Ohlins Road and Track coilovers
Whiteline steering bump kit
Whiteline spherical bearing front endlinks
Cobb spherical bearing rear endlinks
Cusco rear control arm
Project KICS R40 lug nuts
Perrin rear 22mm sway bar
Eibach front 22mm sway bar
Tons of bushing upgrades

Interior:
Alpine PDX-V9 900w 5 channel amplifier
Alpine Type-R 6.5 inch speakers front/rear
Alpine Type-R 12'' subwoofer
Dynamat Xtreme doors/floor/tunk
Kenwood DNX-891HD headunit
Custom carbon fiber trim pieces
STI center console trim/shifter boot
WC Lathe Werks Elite VP Sti sphere shift knob

Exterior:
JDM Grille
50% tint all around
Lightwerkz Morimoto D2S 3.0 hid retrofit
Miromoto C-Lights

Misc:
Perrin steering dampner
Mishimoto aluminum radiator + shroud
Optima Yellow Top Battery
SMY clustermaker dual gauge pod 52mm
Innovate MTX-D Dual function oil temperature/pressure gauge
Innovate SCG-2 solenoid boost controller w/Wideband gauge kit
Mishimoto black silicon hose kit

Car being assembled by GST Motorsports in Hayward. Will be e-tuned by Bren-Tuning. Think I'll stick with 91 for now and wait for GoodSpeeds port injection kit and Cobbs flexfuel kit.

6/15/16 Car is done, and now I got a long 1500 mil break in ahead of me.

To be continued...

UPDATE 8/15/2016 - Annnd thats all folks, engine broke again! Appears to be ringland failure!

UPDATE 2/1/17 - Part out!

UPDATE 5/1/17 - Hah just kidding, putting a new block in!

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Last edited by psyclobe; 06-10-2017 at 03:19 PM.
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Old 05-21-2016, 12:51 PM   #2
Srtkr
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Member#: 228025
Join Date: Oct 2009
Chapter/Region: MWSOC
Location: Ill noise
Vehicle:
07 Forester XT
Blue

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This is Gonna be a perfect street car.
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Old 05-23-2016, 10:11 AM   #3
fl1p
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Location: NoVA
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Hell yea, man! Congrats! 'bout damn time you got her back
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Old 05-23-2016, 10:26 AM   #4
96accord
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Join Date: Apr 2007
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Location: Middle River, Maryland
Vehicle:
2015 WRB WRX Limited
2007 WRX Limited (sold)

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Subscribed.
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Old 05-30-2016, 03:09 AM   #5
immortal
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15 WRX EFR 7064

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Big pimpin
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Old 06-02-2016, 11:13 PM   #6
CMoranRVA
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Location: RVA
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2015 WRX
WRB

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Curious, any idea on what caused the engine to blow?
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Old 06-02-2016, 11:28 PM   #7
Tsujen
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Location: Chicagoland
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15 WRX Limited
WRB

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Ooooo This is gonna be good.
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Old 06-02-2016, 11:30 PM   #8
psyclobe
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Join Date: Jul 2014
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Location: CA, Fresno
Vehicle:
2015 WRX
Crystal Black Silica

Default

Quote:
Originally Posted by CMoranRVA View Post
Curious, any idea on what caused the engine to blow?
There's been lots of discussion in the 15 motor failure thread, I don't really know anything, but the best theory yet is weak parts and high cylinder pressure.

http://forums.nasioc.com/forums/show....php?t=2749732
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Old 06-03-2016, 09:27 AM   #9
Obviously Tyler
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Location: Bucks County, PA
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2016 WRX Premium
Rock Chip Metallic

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Very impressive mod list.

Looking forward to this one.
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Old 06-10-2016, 03:02 AM   #10
psyclobe
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Join Date: Jul 2014
Chapter/Region: SCIC
Location: CA, Fresno
Vehicle:
2015 WRX
Crystal Black Silica

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Custom top mount oil cooler in!


Last edited by psyclobe; 06-10-2016 at 04:03 AM.
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Old 06-10-2016, 12:22 PM   #11
shadrag
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Member#: 393545
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Location: CT
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2015 WRX (6MT)
DGM

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I love when people go front mount, but still keep the scoop functional.

Looking really nice!
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Old 06-12-2016, 09:00 PM   #12
Crusaider510
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Vehicle:
93 Impreza
Forest Green

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Nice to see a local subie!
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Old 06-15-2016, 02:01 PM   #13
immortal
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15 WRX EFR 7064

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Holy day of braaapage today?
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Old 06-16-2016, 07:20 PM   #14
psyclobe
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2015 WRX
Crystal Black Silica

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Old 07-14-2016, 08:29 AM   #15
Schtoogie
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A full and proper build. Nice. I am thinking of doing something similar to my car, with the STI transmission swap and DCCD removal.

Do let us know how she is after the break-in I'm very curious!
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Old 07-14-2016, 10:58 AM   #16
psyclobe
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Crystal Black Silica

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Well she's all broken in. Car has turned into quite a little beast. Externally venting waste gates are loud as ****.

Still quite a few bugs to work out before she's 100%.
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Old 07-14-2016, 12:23 PM   #17
Schtoogie
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You removed the DCCD right? How does she handle with the 65 rear torque split?
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Old 07-14-2016, 12:47 PM   #18
psyclobe
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Crystal Black Silica

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Well my transmission is the non dccd version. And the differential in the center is a rare cusco tarmac. I think I might've gotten the last NIB one in the US.

Unlike the STI dccd version, this differential is a planetary gear open differential with a bias built into the sizing of the gears. So if you do happen to break the rear tires loose you'll get all the power sent to them. This is actually the setup cusco reccomends for drifting in their lsd manual (not that I have any desire to do so).

The first thing I noticed with the cars handling was the massive understeer during cornering and throttle, and then the very noticible under steer when throttle was let off. Stock that never happened, but I guess it makes sense now because my car is basically a 4x4 during throttle due to the two lsds locking up.
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Old 07-14-2016, 02:00 PM   #19
Schtoogie
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Makes sense. Do you know if it is possible to link a viscous locking diff in line with the Cusco center? For my build I was hoping to go non-DCCD mostly for longevity. I know there are plenty of high mileage STIs out there but I'm just not sure how the constantly-slipping center diff clutches hold up with time and abuse.

You might have better luck dialing out understeer with a torsen or open front... I have been racking up a huge spreadsheet on an STI transmission swap and I think that's how I think I'd go at this point (also because I don't particularly want to open the transaxle every 30k miles to rebuild the front diff).
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Old 07-14-2016, 02:05 PM   #20
psyclobe
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2015 WRX
Crystal Black Silica

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Quote:
Originally Posted by Schtoogie View Post
Makes sense. Do you know if it is possible to link a viscous locking diff in line with the Cusco center? For my build I was hoping to go non-DCCD mostly for longevity. I know there are plenty of high mileage STIs out there but I'm just not sure how the constantly-slipping center diff clutches hold up with time and abuse.
I've been told that the DCCD does behave a little oddly due to its complexity, but the center diff is a lot easier to replace then the front.

Quote:
Originally Posted by Schtoogie View Post
You might have better luck dialing out understeer with a torsen or open front... I have been racking up a huge spreadsheet on an STI transmission swap and I think that's how I think I'd go at this point (also because I don't particularly want to open the transaxle every 30k miles to rebuild the front diff).
Here's the cusco guide: http://www.cusco.co.jp/en/pdf/LSD%20Guide%20Final.pdf

I should be able to change the cams on the front lsd to make its locking a lot more mild according to the document. Also there is no reccomendation in the AWD section that doesn't include a front LSD in at least 1 way configuration (which is what I have mine set to). You'll only rebuild it at 30k if you're racing the car professionally.
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Old 07-14-2016, 02:41 PM   #21
Schtoogie
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Did you do all the transmission work yourself?

The center diff in the non-DCCD had a rear bias LSD in it already, didn't it?
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Old 07-14-2016, 02:46 PM   #22
psyclobe
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Join Date: Jul 2014
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Location: CA, Fresno
Vehicle:
2015 WRX
Crystal Black Silica

Default

Quote:
Originally Posted by Schtoogie View Post
Did you do all the transmission work yourself?
No I'm just a hack mechanic, don't know ****. GST did the transmission overhaul, and they worked with a specialized transmission shop which did bench testing on it.

Quote:
Originally Posted by Schtoogie View Post
The center diff in the non-DCCD had a rear bias LSD in it already, didn't it?
No stock this one had a 2kg center viscous coupling differential.
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Old 07-14-2016, 03:03 PM   #23
Schtoogie
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15 WRX

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Word. I've rebuilt a few EJ motors but I have never cracked open a Subaru transaxle. I'd much prefer to do this stuff myself to save money and also because I'm the special kind of crazy that thinks this stuff is fun.

How does your Ohlins suspension compare to stock?
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Old 07-14-2016, 03:14 PM   #24
psyclobe
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2015 WRX
Crystal Black Silica

Default

Quote:
Originally Posted by Schtoogie View Post
How does your Ohlins suspension compare to stock?
Well I haven't run stock in a long time, I was running some ISC N1 coil overs for a while, they were not bad actually, but they made some noise and their stiffest setting was pretty damn stiff. These ohlins are much more advanced though and they're stiffest setting is not nearly as stiff. I'm on the stiffest setting for now because I'm trying to avoid rubbing until I can fix the camber or roll the fenders a bit. Once thats taken care of I'll dive in to some more settings.
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Old 08-03-2016, 03:58 AM   #25
psyclobe
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2015 WRX
Crystal Black Silica

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Ah hell, time to wrap my headers
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