Likely the first FA2/4 hybrid incoming

[autoracer86]

Since the first gen and second gen ecu are a bit different how does that affect the performance and tuning ? Sorry if that's a noob question very new to these things lol

I am becoming more and more interested in doing a FA24 swap or maybe FA24 short block with FA20 heads over say a supercharger.

[Tatsu333]

Originally Posted by autoracer86

Since the first gen and second gen ecu are a bit different how does that affect the performance and tuning ? Sorry if that's a noob question very new to these things lol

I am becoming more and more interested in doing a FA24 swap or maybe FA24 short block with FA20 heads over say a supercharger.

The FA20 ECU would need to be tuned to run the FA24 properly.

[autoracer86]

Originally Posted by Tatsu333

The FA20 ECU would need to be tuned to run the FA24 properly.

Yeah I know it needs to be tuned but does the FA20 ecu have all the same tables and what not to run the FA24.

[Ultramaroon]

Originally Posted by autoracer86

Yeah I know it needs to be tuned but does the FA20 ecu have all the same tables and what not to run the FA24.

Practically any four cylinder engine can be modded to look like an fa20 for the ecu. It'll work perfectly.

[autoracer86]

Originally Posted by Ultramaroon

Practically any four cylinder engine can be modded to look like an fa20 for the ecu. It'll work perfectly.

Cool thanks ! I should have a better read over this thread

[removedonut]

Originally Posted by autoracer86

Since the first gen and second gen ecu are a bit different how does that affect the performance and tuning ?

The short answer to this question, as the other guy stated, is that after making the necessary modifications the FA24 will appear no different to the 1st gen ECU compared to an FA20.

The more detailed answer depends on whether we’re talking about a 13-16 or 17-20. Broadly, the only sensor differences between the FA24 and FA20 are:
- Oil temperature
- Coolant temperature
- Evap purge
- Fuel pressure
- Crank position
- Cam position (only for 13-16, 17-20 is same as FA24)

The first four we can solve with connector repins since the sensor has changed, but the data it’s outputting has not. Crank position is also solvable via a connector swap on 17-20 cars, but requires a full custom solution on 13-16 due to the sensor type completely changing, which is what I’m working on. 13-16 also has an inverted camshaft position signal compared to what the FA24 puts out, which is what the metal trigger wheels pictured in my product photo are meant to solve.

[autoracer86]

Thanks for the detailed explanation

[alphasaur]

Originally Posted by removedonut

Correct. 2017-2020 is a much cheaper option since we are able to use the FA24 as-is with just 4 adapter harnesses and a fuel pressure sensor swap, since the 17-20 ECU is already set up to accept a hall effect crank signal and shares the same cam reluctor pattern as the FA24.

(also hi. i am the one building those swap kits lol. happy to answer any questions about the swap)

So fa24 is effectively plug and play now?

[removedonut]

Originally Posted by alphasaur

So fa24 is effectively plug and play now?

For 17-20, yeah. Plug in 4 adapters, replace the FA24 fuel pressure sensor with a 17-20 sensor, and you have a running FA24.

13-16 requires that you pop open the timing cover and replace the trigger wheels on the cam gears which I wouldn’t exactly call plug and play, but as far as engine swaps go it’s ez.

[alphasaur]

Originally Posted by removedonut

For 17-20, yeah. Plug in 4 adapters, replace the FA24 fuel pressure sensor with a 17-20 sensor, and you have a running FA24.

13-16 requires that you pop open the timing cover and replace the trigger wheels on the cam gears which I wouldn’t exactly call plug and play, but as far as engine swaps go it’s ez.

time to bump my boost to the moon

[jflogerzi]

Now we just need more wrecked Gen 2's to make the engines cheaper!

[alphasaur]

Originally Posted by jflogerzi

Now we just need more wrecked Gen 2's to make the engines cheaper!

everytime I see a wrecked gen 2 on reddit

[Drifter X]

You can buy a crate motor. https://parts.bestbuysubaru.com/p/En...0100CE990.html


Sent from my iPhone using Tapatalk

[NoHaveMSG]

Originally Posted by removedonut

For 17-20, yeah. Plug in 4 adapters, replace the FA24 fuel pressure sensor with a 17-20 sensor, and you have a running FA24.

13-16 requires that you pop open the timing cover and replace the trigger wheels on the cam gears which I wouldn’t exactly call plug and play, but as far as engine swaps go it’s ez.

The crank position sensor and reluctor are different on 17’+ as well. Innie vs. outie like the cam position and I believe the crank position sensor has an extra wire vs. pre 17’ cars.