2015 STI build

alexmartynyuk · 12-01-2020, 01:50 AM

Hello everyone! Not sure if this is the right place to start a build thread or the power proven section(mods move if needed but I felt the built motor discussion section would be more appropriate).

Anyway, a while ago my brother ended up acquiring a 2015 sti that was mostly stock with the exception of an Invidia catless downpipe. A long time before him getting this car I got into tuning and Subaru was my learning platform, doing it as a hobby over time my tuning experience has advanced and because of that my brother was looking out for an sti as it would allow us to do a good amount in mods while saving a bit in tuning costs.

After getting this car I quickly checked the map and found it was stock, so after getting a wideband I did a quick stage2 tune on it and it didn't make super high numbers but it was a safe tune. After owning the car for a while and getting bored of low power he ended up getting more mods which included an FP Red turbo(older 35r compressor wheel with the antisurge cover) and other supporting mods with full 3" exhaust and an external wastegate and enough fuel system to support 500whp on pump gas. So we installed everything and started getting the car dialed in and on the third revision it spun a bearing after letting off. So we were really upset about the whole situation as that last pull was super conservative, running about 17psi with very conservative timing and afr being on the rich side. Got the car towed and parked it.

After about a year of the car being parked we finally yanked the block out and to our surprise we found out it was an outfront grocery getter series block, both of us were really upset that it spun a bearing being that it was already built and the fact that in my brothers ownership the vehicle was always regularly maintained and always used good oil. The car was regularly logged and never encountered detonation. After splitting the block we found out that it obviously spun a rod bearing, and all bearing wear looked really bad and uneven on the main bearings to the point that one of the main bearings lost tension. Its hard to say why it had that kinda bearing wear, but at this point we were bummed out because the block was already bored out to 99.75 and our hope was that it was a stock block so we can get 99.75 pistons and decent rods and have the case halves closed decked. However if we were to do that with the block we have we would have to bore it out to the next size up which is 100mm and both of us felt like its sketchy to run that size because cracking a liner is something we were trying to avoid. So anyway my brother considered getting a whole new closed deck short block from outfront but that didn't work out, he also considered the IAG route as well but we figured why not be different and sleeve the block.

A friend of mine who I regularly tune has been working with a local machine shop who has experience with darton sleeves on the ej engines as well as other platforms so after getting in touch with the machine shop and having him inspect the case halves we decided to proceed and start gathering a parts list. So this brings us to today, since RealStreet was having a black friday sale my brother made a huge purchase, parts list and part numbers as follows:

Bottom end

Pistons
JE Ultra series pistons 99.5mm 8.5:1cr 361327

Rods
Brian Crower forged I beam rods 130.5mm with 625 fasteners BC6606

Crank
OEM subaru 79mm ej257 crank shaft 12200AA430

Sleeves
Darton dry sleeves 300-031-3

Heads

Cams
GSC S2 Dual AVCS cams 7026S2

Intake valves
GSC Chrome polished stainless steel +1mm 2014-1

Exhaust valves
GSC Super alloy exhaust valves +1mm 2017-1

Valve springs and retainers
GSC Beehive valve springs and retainers 5043

Head studs
IAG performance ARP2000 14MM head studs IAG-ENG-1711

Head Gasket
Currently thinking of using a JE Proseal with copper orings

* Registered users of the site do not see these ads.

alexmartynyuk · 12-01-2020, 01:50 AM

The machine shop I will be working with is called G&A cylinder heads and is located in Portland Oregon. This machine shop is currently working on a closed deck solution for ej engines so depending on if they offer that service by the time we are going to have this block machine we may be doing the closed deck along with the darton sleeves. I must also add that this block will be getting the mains pinned by this machine shop as well as get line bored as well.

alexmartynyuk · 12-01-2020, 01:56 AM

Reserved for the future.

alexmartynyuk · 12-01-2020, 01:58 AM

Is there a way to embed pictures? Photobucket no longer hosts for free, imgur is no longer either. I would like to upload pictures to keep on the forum for as long as possible.

Zak6182 · 12-01-2020, 06:10 AM

Click on "Images" at the top of this page. Once you have everything setup and your pictures uploaded, select the images you want by clicking the box in the right corner of the picture (see #1 below). Then action (#2) and get embeded codes (#3) and then click copy. Then paste into the forum and the images will show up without having to click the link. At least that's the way I do it.

alexmartynyuk · 03-06-2021, 03:15 AM

Quote:

Originally Posted by Zak6182

Click on "Images" at the top of this page. Once you have everything setup and your pictures uploaded, select the images you want by clicking the box in the right corner of the picture (see #1 below). Then action (#2) and get embeded codes (#3) and then click copy. Then paste into the forum and the images will show up without having to click the link. At least that's the way I do it.

Thank you, tried this for the first time today lol. Just an update on the build. My brother purchased all the parts on black friday, unfortunately the vendor sold out of the cams and rods we ordered so fast that they were not able to update their inventory on time. We have everything but the connecting rods which we had to wait on because they make them in large batches due to their heat treating process and BC just got their batch filled so we should be receiving them this month. After we have that then we will start looking things over and start visiting our machine shop. Will update the thread as we make some progress.

alexmartynyuk · 04-27-2021, 02:22 AM

Well since my brother has most of the parts for the build I started working on the block today. I am going to modify certain areas of the oil galleys where it does not interfere with even distribution since I'm doing this by hand. I'm hoping that every little modification will help in some way with better oiling, it certainly will not hurt anything.

The block before I touched it with a carbide burr.

You can tell there is a small lip/ledge at this port where the oil galley goes to the oil filter. This is what it looks like before I touched it.

Also where the oil pump sucks oil from the pickup tube, you can tell there is a ledge/lip as well, this is a before picture.

alexmartynyuk · 04-27-2021, 02:24 AM

By the way if anyone does any DIY porting and is looking for good carbide burrs, I got some of mine from Headgames. The ones I got from them are for cutting aluminum only, and man do they cut nice and leave a very nice surface finish.

alexmartynyuk · 04-27-2021, 11:05 PM

Here is that oil galley after a little grinding

Same galley different angle

alexmartynyuk · 05-20-2021, 01:57 AM

Some more pictures of the ported oil galleys

alexmartynyuk · 05-20-2021, 02:08 AM

While I am waiting on new case bolts which by the way going with stock bolts not arp gonna blast the oil galleys with a pressure washer for a couple of hours to make sure they are somewhat clean before we take the case halves to the machine shop.

alexmartynyuk · 05-31-2021, 04:53 AM

Degreased the block and blasted the oil galleys with the pressure washer and boxed the case halves. Gonna take it to the machine shop hopefully next week.

alexmartynyuk · 06-09-2021, 02:22 AM

Finally took the pile to the machine shop

Karlot · 06-09-2021, 08:51 AM

nice. what are the plans for the entire build? still plan on the fp turbo or going with something else?

alexmartynyuk · 06-09-2021, 02:07 PM

Quote:

Originally Posted by Karlot

nice. what are the plans for the entire build? still plan on the fp turbo or going with something else?

Fp red will be used until its broken in then we will build our own twin scroll kit for an EFR series or maybe one of the precision offerings.

Karlot · 06-09-2021, 03:10 PM

Quote:

Originally Posted by alexmartynyuk

Fp red will be used until its broken in then we will build our own twin scroll kit for an EFR series or maybe one of the precision offerings.

very nice. be sure to keep this thread updated. i'm subscribed and very interested to see where it goes lol. love being able to see other people's builds

alexmartynyuk · 06-10-2021, 03:23 AM

Quote:

Originally Posted by Karlot

very nice. be sure to keep this thread updated. i'm subscribed and very interested to see where it goes lol. love being able to see other people's builds

Yeah now that we finally got the ball rolling on this project I will update the thread as we make progress. I need to rip the guts out of the heads so that the guides can be pressed out before I start porting it.

Ebradley · 06-10-2021, 05:18 PM

Quote:

Originally Posted by alexmartynyuk

Hello everyone! Not sure if this is the right place to start a build thread or the power proven section(mods move if needed but I felt the built motor discussion section would be more appropriate). Anyway, a while ago my brother ended up acquiring a 2015 sti that was mostly stock with the exception of an Invidia catless downpipe. A long time before him getting this car I got into tuning and subaru was my learning platform, doing it as a hobby over time my tuning experience has advanced and because of that my brother was looking out for an sti. After getting this car I quickly checked the map and found it was stock, so after getting a wideband I did a quick stage2 tune on it and it didn't make super high numbers but it was a safe tune. After owning the car for a while and getting bored of low power he ended up getting more mods which included an FP Red turbo(older 35r compressor wheel with the antisurge cover) and other supporting mods with full 3" exhaust and an external wastegate and enough fuel system to support 500whp on pump gas. So we installed everything and started getting the car dialed in and on the third revision it spun a bearing after letting off. So we were really upset about the whole situation as that last pull was super conservative, running about 17psi with not very much timing and flat 11 afr. Got the car towed and parked it for A LONG time, honestly I don't remember the last time it ran. After about a year of the car being parked we finally yanked the block out and to our surprise we found out it was an outfront grocery getter series block, both of us were really upset that it spun a bearing being that it was already built and the fact that in my brothers ownership the vehicle was always regularly maintained and always used good oil. After splitting the block we found out that it obviously spun a rod bearing, and all bearing wear looked really bad and uneven on the main bearings to the point that one of the main bearings lost tension hard to say why it had that kinda bearing wear but at this point we were bummed out because the block was already bored out to 99.75 and our hope was that it was a stock block so we can get 99.75 pistons and decent rods and have the case halves closed decked. However if we were to do that with the block we have we would have to bore it out to the next size up which is 100mm and both of us felt like its sketchy to run that size because cracking a liner is something we were trying to avoid. So anyway my brother considered getting a whole new closed deck short block from outfront but that didn't work out, he also considered the IAG route as well but we figured why not be different and sleeve the block. A friend of mine who I regularly tune has been working with a local machine shop who has experience with darton sleeves on the ej engines as well as other platforms so after getting in touch with the machine shop and having him inspect the case halves we decided to proceed and start gathering a parts list. So this brings us to today, since RealStreet was having a black friday sale my brother made a huge purchase, parts list and part numbers as follows:

Bottom end

Pistons
JE Ultra series pistons 99.5mm 8.5:1cr 361327

Rods
Brian Crower forged I beam rods 130.5mm with 625 fasteners BC6606

Crank
OEM subaru 79mm ej257 crank shaft 12200AA430

Sleeves
Darton dry sleeves 300-031-3

Heads

Cams
GSC S2 Dual AVCS cams 7026S2

Intake valves
GSC Chrome polished stainless steel +1mm 2014-1

Exhaust valves
GSC Super alloy exhaust valves +1mm 2017-1

Valve springs and retainers
GSC Beehive valve springs and retainers 5043

Head studs
IAG performance ARP2000 14MM head studs IAG-ENG-1711

Head Gasket
Currently thinking of using a JE Proseal with copper orings

Following

alexmartynyuk · 07-23-2021, 03:07 AM

Block is still at the machine shop. Looks like it might take a couple of months for them to get to it. I prepped the heads for porting, took all the guts out of the heads and took it to the machine shop to get the guides pressed out before I start grinding.

Somewhat clean and ready to get ported. I will be the one doing the porting by hand. The machine shop might flow test them and scan the ports so that they can cnc port W25 heads.

Tampa_Wagonman · 07-23-2021, 09:03 AM

Following. Looks like one hell of a project! Props to you!!

benflynn · 07-23-2021, 01:27 PM

Well, I was wondering, what worse than a 900 word essay with no breaks, and now I see, it’s some one who quotes the entire damn thing to say ‘fallowing’

Dave D. · 07-23-2021, 03:47 PM

Quote:

Originally Posted by benflynn

Well, I was wondering, what worse than a 900 word essay with no breaks, and now I see, it’s some one who quotes the entire damn thing to say ‘fallowing’

Better than multi-quoting the entire thread. GL with the ongoing build, OP!

undyjr · 07-23-2021, 10:55 PM

Quote:

Originally Posted by benflynn

Well, I was wondering, what worse than a 900 word essay with no breaks, and now I see, it’s some one who quotes the entire damn thing to say ‘fallowing’

That

was

a

tough

read.

alexmartynyuk · 08-10-2021, 01:35 AM

Quote:

Originally Posted by undyjr

That

was

a

tough

read.

I apologize to everyone about the run on sentence and poor writing lol. I wasn’t in the best state of mind as I wrote the first post at like 2am. I did a quick edit on the first post, that said I’m no writer so if you feel like it needs further work give me some pointers.

alexmartynyuk · 08-10-2021, 02:48 AM

I did some very basic measuring of the intake ports. Looking at the pictures you can tell that the casting does vary a bit from port to port.

05-20-2021, 01:57 AM	#10
alexmartynyuk Scooby Specialist Member#: 191967 Join Date: Oct 2008 Location: Vancouver Vehicle: 2005 EVO VIII instagram @_amtuned_	Some more pictures of the ported oil galleys Last edited by alexmartynyuk; 05-31-2021 at 04:49 AM.

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12-01-2020, 01:50 AM	#1
alexmartynyuk Scooby Specialist Member#: 191967 Join Date: Oct 2008 Location: Vancouver Vehicle: 2005 EVO VIII instagram @_amtuned_	2015 STI build Hello everyone! Not sure if this is the right place to start a build thread or the power proven section(mods move if needed but I felt the built motor discussion section would be more appropriate). Anyway, a while ago my brother ended up acquiring a 2015 sti that was mostly stock with the exception of an Invidia catless downpipe. A long time before him getting this car I got into tuning and Subaru was my learning platform, doing it as a hobby over time my tuning experience has advanced and because of that my brother was looking out for an sti as it would allow us to do a good amount in mods while saving a bit in tuning costs. After getting this car I quickly checked the map and found it was stock, so after getting a wideband I did a quick stage2 tune on it and it didn't make super high numbers but it was a safe tune. After owning the car for a while and getting bored of low power he ended up getting more mods which included an FP Red turbo(older 35r compressor wheel with the antisurge cover) and other supporting mods with full 3" exhaust and an external wastegate and enough fuel system to support 500whp on pump gas. So we installed everything and started getting the car dialed in and on the third revision it spun a bearing after letting off. So we were really upset about the whole situation as that last pull was super conservative, running about 17psi with very conservative timing and afr being on the rich side. Got the car towed and parked it. After about a year of the car being parked we finally yanked the block out and to our surprise we found out it was an outfront grocery getter series block, both of us were really upset that it spun a bearing being that it was already built and the fact that in my brothers ownership the vehicle was always regularly maintained and always used good oil. The car was regularly logged and never encountered detonation. After splitting the block we found out that it obviously spun a rod bearing, and all bearing wear looked really bad and uneven on the main bearings to the point that one of the main bearings lost tension. Its hard to say why it had that kinda bearing wear, but at this point we were bummed out because the block was already bored out to 99.75 and our hope was that it was a stock block so we can get 99.75 pistons and decent rods and have the case halves closed decked. However if we were to do that with the block we have we would have to bore it out to the next size up which is 100mm and both of us felt like its sketchy to run that size because cracking a liner is something we were trying to avoid. So anyway my brother considered getting a whole new closed deck short block from outfront but that didn't work out, he also considered the IAG route as well but we figured why not be different and sleeve the block. A friend of mine who I regularly tune has been working with a local machine shop who has experience with darton sleeves on the ej engines as well as other platforms so after getting in touch with the machine shop and having him inspect the case halves we decided to proceed and start gathering a parts list. So this brings us to today, since RealStreet was having a black friday sale my brother made a huge purchase, parts list and part numbers as follows: Bottom end Pistons JE Ultra series pistons 99.5mm 8.5:1cr 361327 Rods Brian Crower forged I beam rods 130.5mm with 625 fasteners BC6606 Crank OEM subaru 79mm ej257 crank shaft 12200AA430 Sleeves Darton dry sleeves 300-031-3 Heads Cams GSC S2 Dual AVCS cams 7026S2 Intake valves GSC Chrome polished stainless steel +1mm 2014-1 Exhaust valves GSC Super alloy exhaust valves +1mm 2017-1 Valve springs and retainers GSC Beehive valve springs and retainers 5043 Head studs IAG performance ARP2000 14MM head studs IAG-ENG-1711 Head Gasket Currently thinking of using a JE Proseal with copper orings * Registered users of the site do not see these ads. Last edited by alexmartynyuk; 08-10-2021 at 01:25 AM.

12-01-2020, 01:56 AM	#3
alexmartynyuk Scooby Specialist Member#: 191967 Join Date: Oct 2008 Location: Vancouver Vehicle: 2005 EVO VIII instagram @_amtuned_	Reserved for the future.

12-01-2020, 01:58 AM	#4
alexmartynyuk Scooby Specialist Member#: 191967 Join Date: Oct 2008 Location: Vancouver Vehicle: 2005 EVO VIII instagram @_amtuned_	Is there a way to embed pictures? Photobucket no longer hosts for free, imgur is no longer either. I would like to upload pictures to keep on the forum for as long as possible.

12-01-2020, 06:10 AM	#5
Zak6182 Scooby Newbie Member#: 481754 Join Date: Feb 2018 Location: Beaufort, SC Vehicle: 2017 STi Base Black	Click on "Images" at the top of this page. Once you have everything setup and your pictures uploaded, select the images you want by clicking the box in the right corner of the picture (see #1 below). Then action (#2) and get embeded codes (#3) and then click copy. Then paste into the forum and the images will show up without having to click the link. At least that's the way I do it.

04-27-2021, 02:22 AM	#7
alexmartynyuk Scooby Specialist Member#: 191967 Join Date: Oct 2008 Location: Vancouver Vehicle: 2005 EVO VIII instagram @_amtuned_	Well since my brother has most of the parts for the build I started working on the block today. I am going to modify certain areas of the oil galleys where it does not interfere with even distribution since I'm doing this by hand. I'm hoping that every little modification will help in some way with better oiling, it certainly will not hurt anything. The block before I touched it with a carbide burr. You can tell there is a small lip/ledge at this port where the oil galley goes to the oil filter. This is what it looks like before I touched it. Also where the oil pump sucks oil from the pickup tube, you can tell there is a ledge/lip as well, this is a before picture.

04-27-2021, 02:24 AM	#8
alexmartynyuk Scooby Specialist Member#: 191967 Join Date: Oct 2008 Location: Vancouver Vehicle: 2005 EVO VIII instagram @_amtuned_	By the way if anyone does any DIY porting and is looking for good carbide burrs, I got some of mine from Headgames. The ones I got from them are for cutting aluminum only, and man do they cut nice and leave a very nice surface finish.

04-27-2021, 11:05 PM	#9
alexmartynyuk Scooby Specialist Member#: 191967 Join Date: Oct 2008 Location: Vancouver Vehicle: 2005 EVO VIII instagram @_amtuned_	Here is that oil galley after a little grinding Same galley different angle

05-20-2021, 02:08 AM	#11
alexmartynyuk Scooby Specialist Member#: 191967 Join Date: Oct 2008 Location: Vancouver Vehicle: 2005 EVO VIII instagram @_amtuned_	While I am waiting on new case bolts which by the way going with stock bolts not arp gonna blast the oil galleys with a pressure washer for a couple of hours to make sure they are somewhat clean before we take the case halves to the machine shop.

05-31-2021, 04:53 AM	#12
alexmartynyuk Scooby Specialist Member#: 191967 Join Date: Oct 2008 Location: Vancouver Vehicle: 2005 EVO VIII instagram @_amtuned_	Degreased the block and blasted the oil galleys with the pressure washer and boxed the case halves. Gonna take it to the machine shop hopefully next week.

06-09-2021, 02:22 AM	#13
alexmartynyuk Scooby Specialist Member#: 191967 Join Date: Oct 2008 Location: Vancouver Vehicle: 2005 EVO VIII instagram @_amtuned_	Finally took the pile to the machine shop

06-09-2021, 08:51 AM	#14
Karlot Scooby Newbie Member#: 339923 Join Date: Dec 2012 Location: Virginia Vehicle: 2006 Impreza WRX STi grey	nice. what are the plans for the entire build? still plan on the fp turbo or going with something else?

07-23-2021, 03:07 AM	#19
alexmartynyuk Scooby Specialist Member#: 191967 Join Date: Oct 2008 Location: Vancouver Vehicle: 2005 EVO VIII instagram @_amtuned_	Block is still at the machine shop. Looks like it might take a couple of months for them to get to it. I prepped the heads for porting, took all the guts out of the heads and took it to the machine shop to get the guides pressed out before I start grinding. Somewhat clean and ready to get ported. I will be the one doing the porting by hand. The machine shop might flow test them and scan the ports so that they can cnc port W25 heads.

07-23-2021, 09:03 AM	#20
Tampa_Wagonman Scooby Newbie Member#: 524523 Join Date: May 2021	Following. Looks like one hell of a project! Props to you!!

07-23-2021, 01:27 PM	#21
benflynn Scooby Specialist Member#: 515308 Join Date: Jun 2020	Well, I was wondering, what worse than a 900 word essay with no breaks, and now I see, it’s some one who quotes the entire damn thing to say ‘fallowing’

08-10-2021, 02:48 AM	#25
alexmartynyuk Scooby Specialist Member#: 191967 Join Date: Oct 2008 Location: Vancouver Vehicle: 2005 EVO VIII instagram @_amtuned_	I did some very basic measuring of the intake ports. Looking at the pictures you can tell that the casting does vary a bit from port to port.