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Old 05-30-2012, 10:56 AM   #1
monkeyracer
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Default FA20 vs FB20? Aftermarket parts compatibility?

What are the main differences between the FA20 from the BRZ and the FB20 in the Impreza? (other than 50hp?) What is the same between the two?

What is the likelihood that some performance parts made for the FA20 will fit the FB20, like intake, headers, etc?

Looking at pics of the BRZ under the hood, it looks like not much will swap between the two, but I am curious what is the same between the two engines.
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Old 10-19-2012, 05:27 PM   #2
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Bump this up. Does anyone know?
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Old 10-23-2012, 06:38 AM   #3
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Their both junk and will eventually lead to head gasket failures. Get a Honda or Toyota or even a Mazda
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Old 10-23-2012, 10:14 AM   #4
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Originally Posted by Ghidorah View Post
Their both junk and will eventually lead to head gasket failures. Get a Honda or Toyota or even a Mazda
That was very helpful!

Go troll elsewhere.
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Old 10-23-2012, 03:58 PM   #5
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Quote:
Originally Posted by Ghidorah
Their both junk and will eventually lead to head gasket failures. Get a Honda or Toyota or even a Mazda
The FA was co developed by Toyota. They r&d the direct injection system and very likely much of that was in the head design. Also, why would a completely new engine design have the same well known problem as the previous EJ design? Subaru/Toyota can't be that stupid.
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Old 10-23-2012, 07:28 PM   #6
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Originally Posted by Ghidorah View Post
Their both junk and will eventually lead to head gasket failures. Get a Honda or Toyota or even a Mazda
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Old 10-24-2012, 01:44 AM   #7
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Originally Posted by RaceFaceXC View Post
The FA was co developed by Toyota. They r&d the direct injection system and very likely much of that was in the head design. Also, why would a completely new engine design have the same well known problem as the previous EJ design? Subaru/Toyota can't be that stupid.
It's not Toyota it's Subaru 95%. They will always be junk. They failed to address the head gasket issues for years. This tells you right there that it's not a company that focuses on reliability. Also... The resale value is horrible it's on the same line at Mitsubishi and Saab when they were still a viable company. I was given 11k for my 2009 Impreza 2.5i. I went to Carmax and they offered 12,600. I went the Honda route because they sold me the CR-Z at invoice with just tax and title cost. I was asked by the service dept why in the world did you get a Subaru? I said because I wanted to try a car with a boxer engine and AWD. They told me that they get tons of people with Subaru's looking for a reliable car without oil leaking and coolant leak issues. I'm happy to say that the CR-Z will last me the L15 motor has be shown to go past 800k miles without leaks

Last edited by Ghidorah; 10-24-2012 at 01:50 AM.
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Old 10-24-2012, 09:44 AM   #8
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Originally Posted by Ghidorah View Post
It's not Toyota it's Subaru 95%. They will always be junk. They failed to address the head gasket issues for years. This tells you right there that it's not a company that focuses on reliability. Also... The resale value is horrible it's on the same line at Mitsubishi and Saab when they were still a viable company. I was given 11k for my 2009 Impreza 2.5i. I went to Carmax and they offered 12,600. I went the Honda route because they sold me the CR-Z at invoice with just tax and title cost. I was asked by the service dept why in the world did you get a Subaru? I said because I wanted to try a car with a boxer engine and AWD. They told me that they get tons of people with Subaru's looking for a reliable car without oil leaking and coolant leak issues. I'm happy to say that the CR-Z will last me the L15 motor has be shown to go past 800k miles without leaks
cool story bro...
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Old 10-24-2012, 12:59 PM   #9
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Quote:
Originally Posted by Ghidorah View Post
It's not Toyota it's Subaru 95%. They will always be junk. They failed to address the head gasket issues for years. This tells you right there that it's not a company that focuses on reliability. Also... The resale value is horrible it's on the same line at Mitsubishi and Saab when they were still a viable company. I was given 11k for my 2009 Impreza 2.5i. I went to Carmax and they offered 12,600. I went the Honda route because they sold me the CR-Z at invoice with just tax and title cost. I was asked by the service dept why in the world did you get a Subaru? I said because I wanted to try a car with a boxer engine and AWD. They told me that they get tons of people with Subaru's looking for a reliable car without oil leaking and coolant leak issues. I'm happy to say that the CR-Z will last me the L15 motor has be shown to go past 800k miles without leaks
My Impreza doesn't leak oil, it lets a little bit drain away every few weeks to encourage me to add some fresh oil to keep it running smooth...
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Old 10-24-2012, 01:53 PM   #10
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Quote:
Originally Posted by Ghidorah

It's not Toyota it's Subaru 95%. They will always be junk. They failed to address the head gasket issues for years. This tells you right there that it's not a company that focuses on reliability. Also... The resale value is horrible it's on the same line at Mitsubishi and Saab when they were still a viable company. I was given 11k for my 2009 Impreza 2.5i. I went to Carmax and they offered 12,600. I went the Honda route because they sold me the CR-Z at invoice with just tax and title cost. I was asked by the service dept why in the world did you get a Subaru? I said because I wanted to try a car with a boxer engine and AWD. They told me that they get tons of people with Subaru's looking for a reliable car without oil leaking and coolant leak issues. I'm happy to say that the CR-Z will last me the L15 motor has be shown to go past 800k miles without leaks
Besides this entire post being un substantiated and opinion, with no real facts about your car, it has nothing to do with the discussion at hand.

There was another know it all member here who called me out because I has mistaken the FA/FB engines and also said that Toyota only designed the direct injection system. So I did some research and talked to an engineer for Denso, he stayed that in order to use a direct injection system the intake/combustion chamber has to be designed specifically for the system add a whole. So right there it offers evidence that much of the head design was Toyota involved.

Fixing a flaw inherent to the design of the ej heads was not really possible without redesigning the entire head/case interface. How would you do this without costing serious $ and then having to retrofit s of vehicles? You make it sound like Subaru just said "**** it".
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Old 10-24-2012, 02:06 PM   #11
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I TOTALLY appreciate all the help in this thread that pertains to the subject at hand. /sarcasm

The point of this thread was to find out what performance parts made for the BRZ/FR-S would transfer to the N/A 2.0l Impreza. I asked nothing to do with durability, who made it, or any of that BS.
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Old 10-24-2012, 02:54 PM   #12
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Originally Posted by Ghidorah
i liek hondas
Good for you. Now go away
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Old 10-24-2012, 07:38 PM   #13
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Quote:
Originally Posted by Ghidorah View Post
It's not Toyota it's Subaru 95%. They will always be junk. They failed to address the head gasket issues for years. This tells you right there that it's not a company that focuses on reliability. Also... The resale value is horrible it's on the same line at Mitsubishi and Saab when they were still a viable company. I was given 11k for my 2009 Impreza 2.5i. I went to Carmax and they offered 12,600. I went the Honda route because they sold me the CR-Z at invoice with just tax and title cost. I was asked by the service dept why in the world did you get a Subaru? I said because I wanted to try a car with a boxer engine and AWD. They told me that they get tons of people with Subaru's looking for a reliable car without oil leaking and coolant leak issues. I'm happy to say that the CR-Z will last me the L15 motor has be shown to go past 800k miles without leaks
I've owned 16 Subarus. Many of them I bought with 125-150k mi on them and a few of them had or went over 200k in my possession. Several of them I have owned from new and put 100k+ mi on them myself. My experience is directly counter to your opinion. I have frequently gone 40-50k mi with nothing more than oil changes, coolant and a set of plugs and wires.

I've owned a few Hondas too. Guess what, they get main seal and valve cover gasket leaks at high mileage just like a Subaru. I've blown head gaskets twice on Subarus, both on Ej251s and both right around 100k mi. Never blew a head gasket on an Ej22, Ej18 or Ej20. I've owned them all.
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Old 10-24-2012, 07:39 PM   #14
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Quote:
Originally Posted by monkeyracer View Post
I TOTALLY appreciate all the help in this thread that pertains to the subject at hand. /sarcasm

The point of this thread was to find out what performance parts made for the BRZ/FR-S would transfer to the N/A 2.0l Impreza. I asked nothing to do with durability, who made it, or any of that BS.
Nothing. There's nothing the same about the two engines.
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Old 10-25-2012, 01:39 AM   #15
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Quote:
Originally Posted by RaceFaceXC View Post
Besides this entire post being un substantiated and opinion, with no real facts about your car, it has nothing to do with the discussion at hand.

There was another know it all member here who called me out because I has mistaken the FA/FB engines and also said that Toyota only designed the direct injection system. So I did some research and talked to an engineer for Denso, he stayed that in order to use a direct injection system the intake/combustion chamber has to be designed specifically for the system add a whole. So right there it offers evidence that much of the head design was Toyota involved.

Fixing a flaw inherent to the design of the ej heads was not really possible without redesigning the entire head/case interface. How would you do this without costing serious $ and then having to retrofit s of vehicles? You make it sound like Subaru just said "**** it".
Your claim is vastly flawed. The FA20 is the only motor that utilizes DI, the FB25 FB20 do not. In my opinion DI is over hyped. Hyundai and Audi are already reporting carbon build up that leads to substantial power loss. Honda is now just starting to do DI because everyone else has this. Honda can easily bypass DI by incorporating Lean Burn mode into all of their engines. They could also do iDSI which uses 2 spark plugs per cylinder to increase mpg.

Now back to the FA/FB motor. From what I have read it's still an open deck motor which is an absolute disaster. The EJ255 is close deck which made it so much more reliable. I also think it's outdated to use timing chains. They are harder to replace more costly and stretch over time. Oh and they make the motor noisy.
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Old 10-25-2012, 04:18 AM   #16
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How did you pack so much fail into one post?
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Old 10-25-2012, 05:35 AM   #17
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How did you pack so much fail into one post?
In which post?
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Old 10-25-2012, 08:38 AM   #18
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Originally Posted by Ghidorah View Post
In which post?
any one you've posted in this thread...

I dont see why you're even here, you said you sold your subaru, you now own a honda, and have nothing valuable to contribute to the OP's question.

seems like internet troll just wants to pick a fight...
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Old 10-25-2012, 09:54 AM   #19
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Originally Posted by Ghidorah View Post
Your claim is vastly flawed. The FA20 is the only motor that utilizes DI, the FB25 FB20 do not. In my opinion DI is over hyped. Hyundai and Audi are already reporting carbon build up that leads to substantial power loss. Honda is now just starting to do DI because everyone else has this. Honda can easily bypass DI by incorporating Lean Burn mode into all of their engines. They could also do iDSI which uses 2 spark plugs per cylinder to increase mpg.

Now back to the FA/FB motor. From what I have read it's still an open deck motor which is an absolute disaster. The EJ255 is close deck which made it so much more reliable. I also think it's outdated to use timing chains. They are harder to replace more costly and stretch over time. Oh and they make the motor noisy.
I think you need to do some more fact checking before posting in here again...EJ255 is NOT a fully closed deck. I'm just going to fix that for you but the rest you can do on your own.
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Old 10-25-2012, 12:37 PM   #20
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The only closed deck Subaru engine ive laid eye on is the EJ22T like that found in the 94 BC's.

Anyhow

The FB and FA might not be able to use certain parts across the platforms sauch as headers and other engine specific enhancements. The 2.0i has a different head design (stud spacing) than the FA and they really are two different engines. I would bet the FB20/25 have more in common than either has with the FA20.

The FB20 engine could stand to have a bump in power but I feel that the aftermarket is out of love with the majority of Subarus current models minus the WRX/STi and BRZ. Going forward i dont forsee a reason or demand for ANY aftermarket "power" adders to be produced for that engine. AVO's focus in on the FA as are many of the other big mods houses.

With the EJ253 crowd we had options or were at least able to adapt options fairly easily. With the schism of the WRX/STi|Impreza the 2.0i crowd is on an island by themselves.
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Old 10-25-2012, 12:46 PM   #21
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Quote:
Originally Posted by Ghidorah View Post
Their both junk and will eventually lead to head gasket failures. Get a Honda or Toyota or even a Mazda
Apples and oranges or Inlines and Boxers rather. You cant make that comparision effectively. Inlines have ONE head, ONE DOHC or SOHC valve train, ONE HG and are generally more stout by the nature of the design.

B and K series engines are great. But so is the 1JZ that doesnt mean Honda and Yota are the king of cars or engines.
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Old 10-25-2012, 02:23 PM   #22
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bro honduhs are duh besttt. get sum nitrus for dat ishhhh

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Old 10-25-2012, 03:48 PM   #23
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I think you need to do some more fact checking before posting in here again...EJ255 is NOT a fully closed deck. I'm just going to fix that for you but the rest you can do on your own.
Then explain why the EJ253 was absolute junk and the EJ255 and EJ257 were far more reliable in the sense of coolant and oil leaks?
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Old 10-25-2012, 03:53 PM   #24
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bro honduhs are duh besttt. get sum nitrus for dat ishhhh

I'm waiting for cams and more robust coils. The L15 can make 180hp at 11k rpm with cams and springs.I'm also looking into rods as well. Nitros is garbage my Si that revved to 9k didn't need nitros or turbo or charger to beat cars that had those implemented. NA all the way..... Hondata is not working on the second ECU that controls the electric motor and several companies are working on batteries with higher energy densities for the CR-Z/Insight.
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Old 10-25-2012, 04:03 PM   #25
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Originally Posted by Ghidorah View Post
I'm waiting for cams and more robust coils. The L15 can make 180hp at 11k rpm with cams and springs.I'm also looking into rods as well. Nitros is garbage my Si that revved to 9k didn't need nitros or turbo or charger to beat cars that had those implemented. NA all the way..... Hondata is not working on the second ECU that controls the electric motor and several companies are working on batteries with higher energy densities for the CR-Z/Insight.
and all that money and time for a 15 second car.
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