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Fb swap?


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12 replies to this topic

#1 XHighOctanex

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Posted 16 August 2017 - 01:58 PM

Has anyone ever fb swapped an old subaru? We have in a forester at my work and there is no core on the short block once it's out. I have already acquired almost everything for my ej swap but future fb swap maybe? Would be nice for a chain.

#2 GeneralDisorder

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Posted 16 August 2017 - 02:16 PM

The short block rebuild on those is pretty intense. 

 

The issue is going to be electrical - the immobilizer systems on the CANBUS cars are nuts. They hook into a whole bunch of other computers and the dash cluster.... it's super ugly. Standalone maybe. But expect to be in it an arm and a d!ck.

 

GD



#3 86BRATMAN

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Posted 16 August 2017 - 06:26 PM

Everything is integrated on the newer cars. The only way it won't be a massive electrical cluster-F would be to use a standalone ecu.

#4 Numbchux

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Posted 17 August 2017 - 08:35 AM

Yep, what those guys said. Adding a HUGE dose of complication and expense....for what? Maybe with the direct injection you could get better mileage, but that would be very dependent on the tune, which would have to be custom. And it's going to take a long time to regain the several thousand dollar cost of good management.

 

Oh yea, it'll burn twice as much oil.

 

Yea, you wouldn't have to replace a timing belt. Whew, saved a couple hundred bucks there!

 

Maybe a bit more power, but there are cheaper ways to get that (EZ30 comes to mind).


Edited by Numbchux, 17 August 2017 - 08:37 AM.


#5 XHighOctanex

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Posted 17 August 2017 - 02:11 PM

Yep, what those guys said. Adding a HUGE dose of complication and expense....for what? Maybe with the direct injection you could get better mileage, but that would be very dependent on the tune, which would have to be custom. And it's going to take a long time to regain the several thousand dollar cost of good management.

Oh yea, it'll burn twice as much oil.

Yea, you wouldn't have to replace a timing belt. Whew, saved a couple hundred bucks there!

Maybe a bit more power, but there are cheaper ways to get that (EZ30 comes to mind).


Not after power just thinking of a cooler swap, I've already been told the ej25 is too much for my car and I refuse to swap trans I'm staying dual range. Looks like I'm sticking with the ej swap lol

#6 XHighOctanex

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Posted 17 August 2017 - 02:14 PM

The short block rebuild on those is pretty intense.

The issue is going to be electrical - the immobilizer systems on the CANBUS cars are nuts. They hook into a whole bunch of other computers and the dash cluster.... it's super ugly. Standalone maybe. But expect to be in it an arm and a d!ck.

GD


This'll be the first fb I've done, 2011 forester already has a rod knock from running out of oil. Got the motor out today, some slight differences from the standard ej. Be interesting putting the new motor together

#7 86BRATMAN

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Posted 17 August 2017 - 04:00 PM

Not after power just thinking of a cooler swap, I've already been told the ej25 is too much for my car and I refuse to swap trans I'm staying dual range. Looks like I'm sticking with the ej swap lol


But the fb25 makes more horsepower and torque than the sohc ej25.

#8 XHighOctanex

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Posted 17 August 2017 - 09:35 PM

But the fb25 makes more horsepower and torque than the sohc ej25.

from what I read they only make like 130 and the sohc ej25 makes 160



#9 XHighOctanex

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Posted 17 August 2017 - 09:35 PM

But the fb25 makes more horsepower and torque than the sohc ej25.

The FA makes a lot more power 



#10 86BRATMAN

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Posted 17 August 2017 - 09:39 PM

The fb20 in the impreza makes around 140hp, the fb25 in the legacy and forester makes 174hp.

#11 XHighOctanex

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Posted 18 August 2017 - 11:30 AM

The fb20 in the impreza makes around 140hp, the fb25 in the legacy and forester makes 174hp.


Wuuuut how much you got for an ej25 sohc? I just looked on wiki.

#12 86BRATMAN

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Posted 18 August 2017 - 12:46 PM

165 hp for 99-05, 170 hp for 05+

#13 XHighOctanex

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Posted 18 August 2017 - 03:46 PM

165 hp for 99-05, 170 hp for 05+


I must have been reason the fb20 spot on wiki lol the ej hp is right mine is a 04 forester or Impreza sohc I believe. But I have brand new sti rods and a brand new crank but the stock pistons




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