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Old 04-25-2019, 12:34 PM   #1
GravyRobber
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Join Date: Mar 2009
Location: West TN
Vehicle:
2017 WRX STi
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Cool Gravy's 2017 STi Build - IAG, FP Blue **Dyno Tuned**

Got the not-so-surprising ringland failure at just under 16,000 miles. Early, I know. While aggravating, I'm modded, so I won't even bother with a warranty, especially since that would just give me another engine with the same inherent design flaws.
At the time of failure, my relevant mods were:
IAG "Street" AOS
IA Performance Stumble Fix
Invidia 3" Catless Downpipe
K&N Air Filter
Cobb AccessPort
Torqued Performance Stage 2 E-Tune (with multiple revisions)
Stupid Sound Pipe Delete

I initially wanted "OEM+" type performance, like how I imagine the car should have come from the factory, given it's competition these days, but I think I may have over-shot that goal a little. My only requirements are that it must remain TMIC, stock location turbo, and near OEM driveability (I'm okay with spool a little later than stock). With that said, this is the parts accumulation, with installation to begin in the coming weeks:






Engine:
IAG Stage 2.5 Closed-Deck Short Block
IAG TGV Deletes
IAG 3mm Phenolic Spacers
IAG Air Pump Delete
IAG Street AOS
JDM 12mm Oil Pump
Aisin Timing Belt/Water Pump Kit
Killer B Oil Pickup
Killer B Windage Tray
Killer B Oil Pan
ARP 11mm Head Studs
NGK LFR7AIX Spark Plugs
Koyo Aluminum Radiator
Stock Heads/Cams
Grimmspeed Turbo Heat Shield

Exhaust / Forced Induction:
P&P / Ceramic Coated OEM Headers
Grimmspeed Crosspipe
Grimmspeed EWG Up-Pipe
TiAL 38mm Wastegate
FP Blue HTZ Turbocharger
Invidia Catless 3” Downpipe
Invidia N1 Street Catback

Fueling:
AEM 340 LPH Fuel Pump
IA Performance Stumble Fix
ID1050x Injectors

Intake:
Cobb SF Intake w/ Airbox
Cobb Turbo Inlet
ETS TMIC
Grimmspeed Silicone TMIC Couplers

Drivetrain:
South Bench Clutch Stage 2 Endurance Clutch
New OEM Flywheel
Group N Engine Mounts
Group N Transmission Mount

Tuning/Monitoring:
Grimmspeed 3-Port EBCS
Cobb AP V3
AEM X-Series UEGO Wideband O2
AEM X-Series Oil Pressure Gauge
SMY 52mm Gauge Cluster

Exterior:
2018 Bumper
2014 BBS Limited Wheels
Diode Dynamics C-Lights
Morimoto LED Fog Lights
Diode Dynamics LED Turn Signals
Diode Dynamics "Tail as Turn"
Subispeed Left Exhaust Exit Cover

As E85 is extremely limited and inconvenient in my area, I won't be doing Flex Fuel, or even a separate E85 tune. Quality 93 is readily available, so that is what I'll be tuning for.

My power hopes (dreams?) are mid-high 300's WHP/WTQ with decent spool and response. I want the car to be reliable and DD friendly. I don't have any plans of tracking or autocrossing it, but I will eventually add cooling capacity for when the time comes.

I'll do my best to keep this post updated and will share results of the build when completed. Feedback is welcomed, but please keep it civil and polite. I realize there are several options and opinions when it comes to this kind of build, and I appreciate the insight from other viewpoints. In my opinion, this above list represents a build that balances quality, reliability, and budget.

**Dyno Tuned: 366whp/335wtq, More info on Post #40**

Thanks for reading!
Eric

A few pics:







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Last edited by GravyRobber; 08-11-2019 at 05:20 PM.
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Old 04-25-2019, 01:53 PM   #2
Dave D.
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06 Red Ltd.Wagon
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You might want to add some mild cams and stronger valve springs. That setup is going to love to rev.
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Old 04-25-2019, 05:15 PM   #3
BlueSTI4Me
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Nice list of parts.
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Old 04-25-2019, 07:20 PM   #4
GravyRobber
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Quote:
Originally Posted by Dave D. View Post
You might want to add some mild cams and stronger valve springs. That setup is going to love to rev.
That is definitely a tempting addition. This whole thing started with "I'll just get a basic block with forged pistons" to going closed-deck, and some power adders. So needless to say, I'm about about 2.5X my original planned budget So for now, I'm just going to keep it as is so I can get it back on the road sooner than later.
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Old 04-26-2019, 06:50 AM   #5
BlueSTI4Me
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Quote:
Originally Posted by GravyRobber View Post
That is definitely a tempting addition. This whole thing started with "I'll just get a basic block with forged pistons" to going closed-deck, and some power adders. So needless to say, I'm about about 2.5X my original planned budget So for now, I'm just going to keep it as is so I can get it back on the road sooner than later.
Baahahahaha, mine started two years ago as new turbo, headers, injectors and flex-fuel. Then came Black Friday IAG sale and now it's a complete new engine from the oil pan up, SMDH.
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Old 04-30-2019, 10:00 AM   #6
GravyRobber
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2017 WRX STi
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Started tearing down the old long block yesterday. Got a little bit done on the new short block, but still waiting for some parts to arrive. It appears that the failure was in both cylinder 2 and 4. Both driver's side cylinders are scored, and the crank/rods show evidence of overheating. Got the heads off and cleaned them up and they appear to be just fine. Will do a good thorough cleaning, but I believe the heads are more or less ready to bolt right back on.
EDIT: I'm taking them to the local machinist just to be extra sure.

Last edited by GravyRobber; 04-30-2019 at 11:53 AM.
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Old 04-30-2019, 10:17 AM   #7
Turpid Porpoise
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Location: Lovettsville, Virginia
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2008 Impreza WRX STi
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Any specific reason you decided you wanted to stay TMIC and stock location turbo?

Should be a fun car once you are all done, I ended up making 409whp on my FP Blue using 93 octane before I started having valvetrain issues.
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Old 04-30-2019, 11:52 AM   #8
GravyRobber
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Quote:
Originally Posted by Turpid Porpoise View Post
Any specific reason you decided you wanted to stay TMIC and stock location turbo?

Should be a fun car once you are all done, I ended up making 409whp on my FP Blue using 93 octane before I started having valvetrain issues.
For TMIC, I absolutely do not want to get rid of the OEM crash beam. I'm unwilling to compromise on that.

Stock location turbo for simplicity. I want to keep it as factory/DD friendly as possible. Maybe I'll go rotated in the future, but for now I wanted bolt-on simplicity.
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Old 04-30-2019, 01:50 PM   #9
cknowlen
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2011 STI limited
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Is there supposed to be pictures on this build thread or is my work computer effing me again?
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Old 05-01-2019, 06:26 AM   #10
GravyRobber
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Quote:
Originally Posted by cknowlen View Post
Is there supposed to be pictures on this build thread or is my work computer effing me again?
There will be. I haven’t gotten around to getting them uploaded yet.

EDIT: So its been years since I've been active on any forum. Photobucket seems to suck now and wants to charge money. Whats the go-to for hosting images these days? Otherwise this might be a pictureless thread

Last edited by GravyRobber; 05-01-2019 at 12:06 PM.
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Old 05-01-2019, 12:08 PM   #11
GravyRobber
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Update:

Dropped the heads off at the machine shop. The exhaust side of the driver's side head won't hold pressure on their vacuum tester. Not surprising at all really. The machinist said it is most likely a very simply fix and they'll address it. Then they're going to clean them up and flush them out for me. Should take a few days but I'm still waiting for some parts and OEM gasket kit to arrive anyway.
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Old 05-01-2019, 02:07 PM   #12
Turpid Porpoise
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Quote:
Originally Posted by GravyRobber View Post
There will be. I havenít gotten around to getting them uploaded yet.

EDIT: So its been years since I've been active on any forum. Photobucket seems to suck now and wants to charge money. Whats the go-to for hosting images these days? Otherwise this might be a pictureless thread
Try imgur or imgbb
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Old 05-06-2019, 05:27 PM   #13
GravyRobber
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Been busy traveling for work. Will try to get some pics up this week. Updated original post with a slightly revised parts list.

I am assembling this engine myself with help from some friends and the FSM. Hoping to have it together and start breaking it in by the end of May.
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Old 05-06-2019, 06:10 PM   #14
BlueSTI4Me
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WRB IG @got2boostit2

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Quote:
Originally Posted by GravyRobber View Post
There will be. I havenít gotten around to getting them uploaded yet.

EDIT: So its been years since I've been active on any forum. Photobucket seems to suck now and wants to charge money. Whats the go-to for hosting images these days? Otherwise this might be a pictureless thread
I'm using IMGUR.
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Old 05-06-2019, 06:11 PM   #15
BlueSTI4Me
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Be stingy on the Fujubond, very stingy.
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Old 05-08-2019, 12:38 PM   #16
GravyRobber
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Small update. Just talked to the machine shop and my heads have checked out just fine. They had to clean up the valve seats on the exhaust side of the LH head, all else is good. They were such low mileage that they didnít even been to deck them or anything. So my hope is to get the heads on and cams in this weekend. Hopefully the valve lash will be good, otherwise Iíll have to order more shims and wait even longer for parts.

Iím still out of town on a work trip but Iíll try to get some pics up soon. Nothing special, just imagine a blue STi with a blown engine.
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Old 05-11-2019, 11:11 AM   #17
GravyRobber
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A couple pics from the other day... Killer B goodies installed along with oil pump, water pump/tstat, tensioner bracket, and heads. More to come awaiting parts. Checked the valve clearances and wasn't super happy to find out that EVERY. SINGLE. exhaust valve was way too tight. Intakes were all ok but the exhausts were way tighter than allowances. So I've ordered 8 new buckets in the correct size. Other than that, everything is going fairly well and I am learning a lot. This is my first time to ever do any kind of engine assembly so the FSM has been my best friend. Can't wait for all these random odd and ends to arrive so I can finally get it back together.








Last edited by GravyRobber; 05-11-2019 at 03:48 PM.
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Old 05-11-2019, 03:43 PM   #18
GravyRobber
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Also installed the Group N motor mounts and began installation of the intake manifold. I'm using a Cobb turbo inlet, which is a massive PITA to install, even with the intake off, and with TGV deletes. They've taken the liberty to delete one of the PCV ports, which means I'll likely have to make a t-fitting somewhere to continue using my "street" AOS.

Also, this noise maker arrived today:



I decided to try out the CNT up-pipe because it doesn't have a flex section, is made from thicker material than others, and is reported to fit perfectly. I normally don't support "knock off" brands, but I'm not aware of any other EWG up-pipes that don't use a flex section.

Last edited by GravyRobber; 05-11-2019 at 09:54 PM.
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Old 05-13-2019, 01:47 PM   #19
GravyRobber
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Small update:

Got my headers back from P&P service so I decided to dry fit the headers/up/turbo. Unfortunately the CNT up-pipe doesn't even begin to fit, so I'll be going back to plan A which is Grimmspeed. I just really didn't want to deal with a flex section. Temporarily installed the stock up-pipe just to verify turbo fitment, and it all fit perfectly, no surprises there.






Last edited by GravyRobber; 05-13-2019 at 03:18 PM.
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Old 05-14-2019, 09:33 AM   #20
GravyRobber
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Location: West TN
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2017 WRX STi
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Couple more pics of test fitting the turbo/inlet. The Cobb inlet required some trimming to fit the turbo, but nothing too major. It's a super tight fit, even with TGV deletes. Using the stock up-pipe as a place holder until my Grimmspeed arrives. I had to clock my IAG AVCS/Turbo oil feed line 90 degrees clockwise to get the brackets to fit without interference.







That's it for now. Might go run the wiring for my gauges while I wait for my lifters and other misc. parts to arrive. Hopefully those will arrive by the end of the week so I can install this weekend.
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Old 05-16-2019, 10:49 PM   #21
Nohedge
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awesome build.
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Old 05-17-2019, 10:18 PM   #22
KalamazooSaabaru
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I like that. I like it a lot
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Old 05-19-2019, 07:09 PM   #23
GravyRobber
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Thanks y'all.

Been out of town and busy the last week, but I had some free time today. New valve buckets came in so I was able to get those in and finally get the heads finished up. Then I got the timing belt and cover on. Engine is almost drop in ready at this point. Just waiting for a couple special order parts to come in (new oil cooler and one OCV).

As it sits currently:
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Old 05-20-2019, 07:32 PM   #24
doowop
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following this! very cool build
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Old 05-23-2019, 09:49 AM   #25
GravyRobber
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Should have the Grimmspeed up-pipe today or tomorrow. Depending on motivation levels, I should have the engine dropped back in the car this weekend. Still waiting on those couple special order parts from Subaru. I can install those with the engine in the car though.
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