Welcome to the North American Subaru Impreza Owners Club Sunday January 22, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Built Motor Discussion

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 05-16-2015, 11:34 PM   #1
dieseltech4565
Scooby Newbie
 
Member#: 420479
Join Date: May 2015
Chapter/Region: MWSOC
Location: chicago
Vehicle:
2015 wrx sti
galaxy blue pearl

Default suggestions for engine build for blown up 2015 sti.

So about a year ago i purchased my 2015 wrx sti, fast forward to now with a axle-back muffler delete and a acessport ots tune my engine has grenaded. pistons shattered, heads destroyed, block is possibly salvageable, turbo is also destroyed of course. i had 20,000 miles on the engine when it failed. now to the point i want to make the best out of the situation so im going to do a engine build. my eventual hope is to get around 450-500 whp mark, but i don't want the power immediately, i want to build a strong foundation so later when i am used to the more awd power (have driven 550hp vette but that's a whole different monster) and can afford to get to the 450-500 whp mark that way i dont have to replace all the internals twice by putting stock grade pistons back in it. so i am looking for suggestions for whether to bore out the failed block or start over with a fresh case and what brand rods and pistons are the best for subies. as for heads suggestions on brands and places to purchase them. then there's the turbo go big as possible off the bat? or go mid sized for faster spool and mid range power. if you have read this thank you for taking the time to do so. any honest input would be greatly appreciated
* Registered users of the site do not see these ads.
dieseltech4565 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 05-17-2015, 10:20 AM   #2
some dude
Scooby Specialist
 
Member#: 100300
Join Date: Nov 2005
Chapter/Region: MWSOC
Location: MIC|-|IG/\N
Vehicle:
06 WRX
CGM

Default

Read through the Built Motor section and the Proven Power Bragging section. Both will provide you with great information on what parts people are using (and sometimes why) and what results they are achieving with them.

After you have done that, you can come back and ask more pointed questions about the build you are putting together for yourself.

In general, you get OEM heads, and pick your poison between previous Subaru offerings like ej257 heads, or ej207 heads... different ones have different size combustion chambers, and flow more or less air than each other.

Regarding internal parts (rods pistons turbo), the reading I suggested above will get you into the ballpark of what looks good.

Good luck!
some dude is offline   Reply With Quote
Old 05-17-2015, 10:24 AM   #3
dieseltech4565
Scooby Newbie
 
Member#: 420479
Join Date: May 2015
Chapter/Region: MWSOC
Location: chicago
Vehicle:
2015 wrx sti
galaxy blue pearl

Default

Will do thanks for the info!
dieseltech4565 is offline   Reply With Quote
Old 05-17-2015, 10:32 AM   #4
wodom86
Scooby Newbie
 
Member#: 397348
Join Date: Jul 2014
Chapter/Region: MAIC
Location: Suffolk, Va
Vehicle:
2011 WRX, JDM 6MT
Dark Gray Metallic

Default

If you have a good tuner locally i would recommend calling them and telling them what you want, they may even be able to build your car for you. My tuner tunes all the cars they build as part of the service so keep that in mind
wodom86 is offline   Reply With Quote
Old 05-17-2015, 10:41 AM   #5
dieseltech4565
Scooby Newbie
 
Member#: 420479
Join Date: May 2015
Chapter/Region: MWSOC
Location: chicago
Vehicle:
2015 wrx sti
galaxy blue pearl

Default

Yea I will be hitting up the local tuner for suggestions. I'll be doing the build myself tho the dealership I work at has a machine shop so if I can save my block I can bore it out there. Once it's all assembled I'll tow it to the tuner and take it from there.
dieseltech4565 is offline   Reply With Quote
Old 05-17-2015, 02:21 PM   #6
BraveSTi
Scooby Specialist
 
Member#: 262030
Join Date: Oct 2010
Chapter/Region: Tri-State
Location: Upinyourgirl.
Default

Safe AND reliable power range IMO is 450-500WHP..THATS it. Get a new EJ shorty-block, throw in some "drop-in" Manley Turbo-tuff pistons with 210 wrist-pins(extreme duty). If your original heads aren't screwed and don't need a hone, then you can just run those…get a good tune from a LEGIT tuner in the interim. Down the line if you save enough pennies, get yourself a nice P & L or AMS rotated kit and tune that baby---------BOOYAH. Nice reliable, healthy, powerful toy.. do your research and you'll see.
Once you start getting all crazy with +550HP, 600HP, 700HP range you have to have $$$- closed-deck, cams, springs, valves blah-blah--Theres really no way to gauge how long these lil EJ engines will last pushing all that out…
BraveSTi is offline   Reply With Quote
Old 05-28-2015, 08:10 PM   #7
slowgenius
Scooby Specialist
 
Member#: 48350
Join Date: Nov 2003
Chapter/Region: MAIC
Location: Pittsburgh
Vehicle:
WRX 03/04/07 hybrid
PSM

Default

Start with a new closed deck case from outfront. Get the bigger head studs. The manley pistons are nice and the tt manley ibeam con rods. You can get new blank heads, you pick the valves, cams etc. Swap over sensors gears etc.
slowgenius is offline   Reply With Quote
Old 06-02-2015, 02:17 PM   #8
BraveSTi
Scooby Specialist
 
Member#: 262030
Join Date: Oct 2010
Chapter/Region: Tri-State
Location: Upinyourgirl.
Default

Quote:
Originally Posted by slowgenius View Post
Start with a new closed deck case from outfront. Get the bigger head studs. The manley pistons are nice and the tt manley ibeam con rods. You can get new blank heads, you pick the valves, cams etc. Swap over sensors gears etc.
Closed deck not necessarily needed; OEM semi-closed is fine.
Better head studs yes. Rods not necessarily needed; OEM rods are good.
What I'm saying is relative to the SAFE & RELIABLE power output of 450-500……..numbers bigger than that he'll be asking for trouble and will be bleeding his pocket either way..
BraveSTi is offline   Reply With Quote
Old 06-02-2015, 02:40 PM   #9
TopSpeed
NASIOC Vendor
 
Member#: 78884
Join Date: Jan 2005
Location: Alpharetta, GA
Vehicle:
Go faster
at TopSpeed

Default

Much like what others have posted, I would suggest a new shortblock that is simply stock rods with an upgraded piston; you can do this your self if you familiar with building engines or many companies (us included) have shortblocks you can buy and have shipped directly to you. These have proven to be something very reliable in the 450ish whp range.

Have your machine shop check the heads out but worse case scenario, new ones aren't terribly expensive and you can swap all the stuff over from your OEM heads.

Just remember, with these cars, less is more is a great saying that holds true until you want to go big power... then more is more lol.
TopSpeed is offline   Reply With Quote
Old 06-03-2015, 07:43 AM   #10
user1029
Scooby Specialist
 
Member#: 57064
Join Date: Mar 2004
Vehicle:
2008 STi IAG built
HTA86 E85 Kel272s Cos IM

Default

Quote:
Originally Posted by dieseltech4565 View Post
pistons shattered, heads destroyed, block is possibly salvageable, turbo is also destroyed of course.
oh the humanity Find a tuner before anything else and learn how to datalog with your new build

I won't even bother saying which company's shortblock I would recommend or how many blah blah miles I have on my build

I'm exercising lots of restraint to suppress that compulsion
user1029 is offline   Reply With Quote
Old 06-03-2015, 07:54 AM   #11
dieseltech4565
Scooby Newbie
 
Member#: 420479
Join Date: May 2015
Chapter/Region: MWSOC
Location: chicago
Vehicle:
2015 wrx sti
galaxy blue pearl

Default

Already have a tuner I'm there second 2015 with a blown motor first guy only got 1800 miles out of his and they denied his warranty because he installed a cusco battery tie down And a perrin turbo heat shield. Already know how to data log. But noted definitely going to log as much as possible with this motor. Decided to go with a new short block with all forged internals, New ported heads, dom3 turbo, 1000cc injectors and supporting mods
dieseltech4565 is offline   Reply With Quote
Old 06-03-2015, 12:42 PM   #12
ky34tr
Scooby Newbie
 
Member#: 422453
Join Date: May 2015
Location: Hopkinton, MA
Vehicle:
2015 WRX Premium MT
Grey

Default

dieseltech4565, do you work at a Subaru dealer?
So I assume your warranty will be void as well due to you mods? Is that why you are not going through Subaru to get a replacement?

Three weeks ago I purchased a 2015 WRX MT, is the moral of the story do not mod anything?

What I am surprised about is the sti engine is not a brand new engine like the new WRX engine is, so why the problems?

Thanks and good luck on your build, will be interested in what you end up with.
ky34tr is offline   Reply With Quote
Old 06-03-2015, 12:47 PM   #13
ALOKIN
Scooby Specialist
 
Member#: 348177
Join Date: Feb 2013
Chapter/Region: TXIC
Location: TX
Vehicle:
2013 WRX STI Limited
600whp IAG CD goodness

Default

Quote:
Originally Posted by user1029 View Post
oh the humanity Find a tuner before anything else and learn how to datalog with your new build

I won't even bother saying which company's shortblock I would recommend or how many blah blah miles I have on my build

I'm exercising lots of restraint to suppress that compulsion
Graveyard motor sports??
ALOKIN is offline   Reply With Quote
Old 06-03-2015, 02:36 PM   #14
user1029
Scooby Specialist
 
Member#: 57064
Join Date: Mar 2004
Vehicle:
2008 STi IAG built
HTA86 E85 Kel272s Cos IM

Default

nothing but the best for my car

user1029 is offline   Reply With Quote
Old 06-03-2015, 07:23 PM   #15
dieseltech4565
Scooby Newbie
 
Member#: 420479
Join Date: May 2015
Chapter/Region: MWSOC
Location: chicago
Vehicle:
2015 wrx sti
galaxy blue pearl

Default

Quote:
Originally Posted by ky34tr View Post
dieseltech4565, do you work at a Subaru dealer?
So I assume your warranty will be void as well due to you mods? Is that why you are not going through Subaru to get a replacement?

Three weeks ago I purchased a 2015 WRX MT, is the moral of the story do not mod anything?

What I am surprised about is the sti engine is not a brand new engine like the new WRX engine is, so why the problems?

Thanks and good luck on your build, will be interested in what you end up with.
I don't work for subaru but I am a dealership mechanic. But there not warrentying cause I had a acessport installed on it so yes moral of the story is if you want to have a warrenty DO NOT MOD IT! they will try to kick it back for whatever they can.
dieseltech4565 is offline   Reply With Quote
Old 06-03-2015, 09:16 PM   #16
Scuby04STi
Scooby Specialist
 
Member#: 328635
Join Date: Aug 2012
Chapter/Region: NWIC
Location: Portland*
Vehicle:
2004 STi GTX3076R
Rally Blue

Default

Quote:
Originally Posted by dieseltech4565 View Post
Already have a tuner I'm there second 2015 with a blown motor first guy only got 1800 miles out of his and they denied his warranty because he installed a cusco battery tie down And a perrin turbo heat shield. Already know how to data log. But noted definitely going to log as much as possible with this motor. Decided to go with a new short block with all forged internals, New ported heads, dom3 turbo, 1000cc injectors and supporting mods
No real need for port work with your goals but it wont hurt anything but your budget.

As for the build it to turn up later thing, not really any point to not just do it all now and run a safe tune until you feel ready for 450-500whp. Be a waste of time/money to buy a smaller turbo for now then swap later, IMO.

As for the motor, I highly recommend buying one from a well known source sealed and ready to drop in. Unless you have a builder you REALLY trust. On my car I went with a local builder because I have a good relationship with them and knew all would end will using him.
Scuby04STi is offline   Reply With Quote
Old 06-05-2015, 03:08 PM   #17
Dave D.
NASIOC Supporter
 
Member#: 130990
Join Date: Nov 2006
Chapter/Region: NWIC
Location: Menzel Lake, WA
Vehicle:
06 Red Ltd.Wagon
20g-xtr jdm 6-spd JJtuned

Default

If you're running a Dom 3 even on pump 1000cc could be questionable. I have a 20g-xtr, and my 1000's are at 90% when my motor gets past 7k, according to my tuner. If you want to run some boost you might want to research this subject a bit more.
Dave D. is offline   Reply With Quote
Old 06-05-2015, 03:22 PM   #18
dieseltech4565
Scooby Newbie
 
Member#: 420479
Join Date: May 2015
Chapter/Region: MWSOC
Location: chicago
Vehicle:
2015 wrx sti
galaxy blue pearl

Default

so bigger injectors?
dieseltech4565 is offline   Reply With Quote
Old 06-05-2015, 05:04 PM   #19
Effex Unlimited
Scooby Specialist
 
Member#: 114562
Join Date: May 2006
Chapter/Region: MAIC
Location: SW Pennsylvania
Vehicle:
2013 STI Hatch
Crystal Black Silica

Default

Quote:
Originally Posted by user1029 View Post
I won't even bother saying which company's shortblock I would recommend or how many blah blah miles I have on my build
Wait...... What?
Effex Unlimited is offline   Reply With Quote
Old 06-05-2015, 06:46 PM   #20
user1029
Scooby Specialist
 
Member#: 57064
Join Date: Mar 2004
Vehicle:
2008 STi IAG built
HTA86 E85 Kel272s Cos IM

Default

Quote:
Originally Posted by Effex Unlimited View Post
Wait...... What?
jajaja
user1029 is offline   Reply With Quote
Old 06-08-2015, 06:02 PM   #21
BraveSTi
Scooby Specialist
 
Member#: 262030
Join Date: Oct 2010
Chapter/Region: Tri-State
Location: Upinyourgirl.
Default

Quote:
Originally Posted by dieseltech4565 View Post
so bigger injectors?
. . . 1000cc Injector Dynamics.
BraveSTi is offline   Reply With Quote
Old 06-08-2015, 06:54 PM   #22
Jubathoph
Scooby Newbie
 
Member#: 382959
Join Date: Feb 2014
Default

Quote:
Originally Posted by user1029 View Post
jajaja
Is this laughing in Spanish?
Jubathoph is offline   Reply With Quote
Old 06-08-2015, 06:58 PM   #23
notaduc
Scooby Newbie
 
Member#: 373327
Join Date: Nov 2013
Default

Quote:
Originally Posted by dieseltech4565 View Post
Already have a tuner I'm there second 2015 with a blown motor first guy only got 1800 miles out of his and they denied his warranty because he installed a cusco battery tie down And a perrin turbo heat shield. Already know how to data log. But noted definitely going to log as much as possible with this motor. Decided to go with a new short block with all forged internals, New ported heads, dom3 turbo, 1000cc injectors and supporting mods
You cant be denied warranty based on a heat shield and a battery tie down. Either they are lying to you, or they got horribly duped. Well, or maybe they put the battery tiedown inside the crankcase.

http://en.wikipedia.org/wiki/Magnuson%E2%80%93Moss_Warranty_Act

Last edited by notaduc; 06-08-2015 at 07:00 PM. Reason: bad link
notaduc is offline   Reply With Quote
Old 06-09-2015, 01:38 AM   #24
user1029
Scooby Specialist
 
Member#: 57064
Join Date: Mar 2004
Vehicle:
2008 STi IAG built
HTA86 E85 Kel272s Cos IM

Default

Quote:
Originally Posted by Jubathoph View Post
Is this laughing in Spanish?
No I'm having a seizure esse
user1029 is offline   Reply With Quote
Old 06-09-2015, 08:06 PM   #25
ALOKIN
Scooby Specialist
 
Member#: 348177
Join Date: Feb 2013
Chapter/Region: TXIC
Location: TX
Vehicle:
2013 WRX STI Limited
600whp IAG CD goodness

Default

Quote:
Originally Posted by user1029 View Post
No I'm having a seizure esse
Hes singing that German song from the acura commercials...

https://youtu.be/yxw2PmC0WTY



User>>

Last edited by ALOKIN; 06-09-2015 at 08:13 PM.
ALOKIN is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 07:34 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.