Welcome to the North American Subaru Impreza Owners Club Thursday March 28, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > FA Series Normally Aspirated Powertrain

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.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 04-06-2017, 01:14 PM   #1
SubieOS04
Scooby Newbie
 
Member#: 432831
Join Date: Oct 2015
Chapter/Region: MWSOC
Vehicle:
2004 Impreza Outback
White

Default Fa20D vs FA20F what's the difference

Just bought a brz motor with a spun rod bearing so I was wondering what can I do with it and what the difference between brz motor and 15+ wrx
* Registered users of the site do not see these ads.
SubieOS04 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 04-06-2017, 03:14 PM   #2
2008STiguy
Scooby Newbie
 
Member#: 368522
Join Date: Sep 2013
Chapter/Region: SCIC
Location: Los Angeles
Vehicle:
2008 STI
OBP

Default

drivetrain and ecu. Unless the frs/brz trans can be mounted directly then really just ecu side of it. I haven't done much research but I wanted to do the same thing.
2008STiguy is offline   Reply With Quote
Old 04-06-2017, 04:03 PM   #3
JRowland
Scooby Specialist
 
Member#: 454620
Join Date: Sep 2016
Location: Maggie Valley, NC
Vehicle:
2017 WRX
Red

Default

BRZ has higher compression and combines direct and port injection. I think there are more differences but the 2 I said are all I'm sure about.
JRowland is offline   Reply With Quote
Old 04-07-2017, 01:56 AM   #4
subaru_gc8
Scooby Specialist
 
Member#: 29292
Join Date: Nov 2002
Chapter/Region: SCIC
Location: Orange County CA
Vehicle:
2004 WRX wagon
silver

Default

from what i heard the brz has bigger ports too
subaru_gc8 is offline   Reply With Quote
Old 04-08-2017, 09:34 AM   #5
Buddiiee
Scooby Newbie
 
Member#: 401168
Join Date: Sep 2014
Vehicle:
2009 WRX
Spark Silver

Default

Wow that car could only be 5 years old max, and it already spun a bearing? Dam...
Buddiiee is offline   Reply With Quote
Old 04-10-2017, 10:47 PM   #6
Johnhalgat
Scooby Newbie
 
Member#: 465855
Join Date: Apr 2017
Chapter/Region: NWIC
Location: Sacramento, CA
Vehicle:
2016 WRX STI
Hyper Blue

Default

Brz likes the boost
Johnhalgat is offline   Reply With Quote
Old 04-10-2017, 10:48 PM   #7
Chuckable
Scooby Specialist
 
Member#: 447566
Join Date: May 2016
Location: GA
Vehicle:
2017 86
Black

Default Fa20D vs FA20F what's the difference

The BRZ engine will not bolt up to the WRX bellhousing.

Also, check out Element Tuning for some great tech info on the motors.
Chuckable is offline   Reply With Quote
Old 04-11-2017, 01:37 AM   #8
WGMGR
Scooby Newbie
 
Member#: 419029
Join Date: Apr 2015
Default

Quote:
Originally Posted by SubieOS04 View Post
Just bought a brz motor with a spun rod bearing so I was wondering what can I do with it and what the difference between brz motor and 15+ wrx


IIRC quite a bit. heads and such are different, with the brz motor being the better one last i remember. but its been a couple years since I researched this so it could be different now.
WGMGR is offline   Reply With Quote
Old 04-13-2017, 09:03 AM   #9
SubieOS04
Scooby Newbie
 
Member#: 432831
Join Date: Oct 2015
Chapter/Region: MWSOC
Vehicle:
2004 Impreza Outback
White

Default

damn not as mix and match as the ej series
SubieOS04 is offline   Reply With Quote
Old 06-21-2020, 07:21 AM   #10
Gundy21
Scooby Newbie
 
Member#: 515777
Join Date: Jun 2020
Default

Quote:
Originally Posted by Chuckable View Post
The BRZ engine will not bolt up to the WRX bellhousing.

Also, check out Element Tuning for some great tech info on the motors.
Possible to swap the bellhousings?
Gundy21 is offline   Reply With Quote
Old 06-23-2020, 01:38 PM   #11
GoFrogs
Scooby Newbie
 
Member#: 507317
Join Date: Oct 2019
Chapter/Region: MAIC
Location: SW Ohio
Vehicle:
2019 WRX
Pure Red

Default

Quote:
Originally Posted by SubieOS04 View Post
Just bought a brz motor with a spun rod bearing so I was wondering what can I do with it and what the difference between brz motor and 15+ wrx

were you planning an All MOTOR build? What were you power plans; max rpm?
GoFrogs is offline   Reply With Quote
Old 06-23-2020, 08:06 PM   #12
KillerBMotorsport
NASIOC Vendor
 
Member#: 198281
Join Date: Dec 2008
Chapter/Region: MAIC
Location: Virginia
Vehicle:
2005 WRX/STi
WRB of course

Default

They are different blocks. Not swappable.

You'd run into issues with the heads, upper pan girdle, and many other things.
KillerBMotorsport is offline   Reply With Quote
Old 11-10-2020, 10:21 PM   #13
irax
Scooby Newbie
 
Member#: 317994
Join Date: Apr 2012
Default

The bell housing pattern is the same an FA20F and FA20D will bolt to the same transmissions. The only thing that can be swapped would be the heads with their matching timing covers. Everything else you have to get matching to the block. For a turbo BRZ owner like my self it doesn't make sense to do so without the willingness to machine the block to allow starter clearance. If the WRX owner wants a cheaper high compression motor its a lot more straight forward since the FA20D(BRZ engine) is the one used in all non turbo applications and has the starter mount on both sides. They still would need to swap heads and matching timing covers. Oil pan would have to match the block. So anything that the WRX pan has that the BRZ doesn't, you would need to modify.

DSport has a great article on building the block

https://dsportmag.com/the-tech/educa...s-of-the-fa20/

Also this a great article as well.

https://dsportmag.com/the-tech/tomei...a20-flat-four/
irax 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 01:36 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.