FA24D (new GR86) into FRS GEN 1

[NoHaveMSG]

Originally Posted by T-Steve

Mostly I am looking for information on the FA24 cam sensors, crank position sensor, injectors, and a few other sensors (temp, pressure, etc.) and interfacing them to the FA20 ECU.

My understanding is it is the same strategy as the 17'+ 1st gens for the cam and crank signals. It stands to reason you may be able to swap the cam trigger wheels and crank reluctor wheel and the appropriate sensors from the older FA20 to the FA24 but nobody has confirmed.

[Tatsu333]

Just did a quick search, and there are some used FA24 complete motors out there for sale in the $6-7K USD range. While they still ain't cheap, they're getting to be in the range of E.G. buying an Edelbrock supercharger, though adapting the wiring harness, etc. to connect to the FA20 ECU will certainly run more labour costs than the supercharger install.

You can also apparently order a new, complete long block now for around $8,600 USD.

I still think this will be the way I'll go eventually if I don't just call it a day after my headers and tune in a few months and spend those funds on track time instead.

[Celigts]

Originally Posted by Tatsu333

Just did a quick search, and there are some used FA24 complete motors out there for sale in the $6-7K USD range. While they still ain't cheap, they're getting to be in the range of E.G. buying an Edelbrock supercharger, though adapting the wiring harness, etc. to connect to the FA20 ECU will certainly run more labour costs than the supercharger install.

You can also apparently order a new, complete long block now for around $8,600 USD.

I still think this will be the way I'll go eventually if I don't just call it a day after my headers and tune in a few months and spend those funds on track time instead.

So explain this to me like I’m an idiot. You’re saying the FA24 long block is what’s needed? Short block I actually replaced recently on my 14 FRS as I had a leaky cylinder 3 causing stalling at red lights and major idle issues. Long block is untouched from the repair.

[Tatsu333]

Originally Posted by Celigts

So explain this to me like I’m an idiot. You’re saying the FA24 long block is what’s needed? Short block I actually replaced recently on my 14 FRS as I had a leaky cylinder 3 causing stalling at red lights and major idle issues. Long block is untouched from the repair.

If you bought just a long block, there would be a LOT of other little bits and pieces that would either need to be purchased or adapted from the FA20. Even if all you want to do is a "block swap" (I.E. keeping the FA20 intake manifold, etc.), buying a complete motor to work from is almost certainly going to be way easier.

I just mentioned the availability of the long block because they weren't available when folks were first talking about this swap, and for comparison with the price of used complete motors.

EDIT: and for those who aren't clear, a long block is generally just an assembled block and heads and usually doesn't include any of the intake / exhaust manifolds or ancillary bits and pieces, sensors, etc.

[kmbkk]

I talked to a shop this weekend who’s already done this swap. They’ll do a swap, complete with a new FA-24 long block, for around $7k. This assumes your car is in good working condition, as they use existing parts from your car. If it wasn’t so far away (the shop is in WI and I’m in VA) I’d probably already have my car there.

[RedReplicant]

Originally Posted by kmbkk

I talked to a shop this weekend who’s already done this swap. They’ll do a swap, complete with a new FA-24 long block, for around $7k. This assumes your car is in good working condition, as they use existing parts from your car. If it wasn’t so far away (the shop is in WI and I’m in VA) I’d probably already have my car there.

Is this ASM? Sounds pretty reasonable to me.

[alex87f]

Originally Posted by kmbkk

I talked to a shop this weekend who’s already done this swap. They’ll do a swap, complete with a new FA-24 long block, for around $7k. This assumes your car is in good working condition, as they use existing parts from your car. If it wasn’t so far away (the shop is in WI and I’m in VA) I’d probably already have my car there.

That's without the block, right?

[kmbkk]

Originally Posted by RedReplicant

Is this ASM? Sounds pretty reasonable to me.

Yep!

[kmbkk]

Originally Posted by alex87f

That's without the block, right?

With! Here's the email noting this:

"Current total price is about $7k for a full fa24 swap. That’s including a new OEM FA24 block. That price also is assuming your old engine is in running condition as we have to reuse many of the original parts."

If I was a little closer I'd already dropped my car off. They're booking 4-5 weeks out and turn time is 1-2 weeks.

[alex87f]

Wow. Impressive. You'll probably need FA24 headers though, right? Or at least not the stock FA20 ones?

A good FI kit with install & tune will set you back nearly as much. More power, yes, but nowhere near the same reliability.

[new2subaru]

Originally Posted by alex87f

Wow. Impressive. You'll probably need FA24 headers though, right? Or at least not the stock FA20 ones?

A good FI kit with install & tune will set you back nearly as much. More power, yes, but nowhere near the same reliability.

FA24 is 228HP. It's not a rocket by any stretch. People will be adding FI to these too if they want any real power.

A header tune on the FA20 will almost get you to the FA24. I haven't driven one but I expect the GR86 to be a lot of new car hype. Let's see what happens when the dust settles.

MY car is SlOw... lol

[kmbkk]

Originally Posted by alex87f

Wow. Impressive. You'll probably need FA24 headers though, right? Or at least not the stock FA20 ones?

A good FI kit with install & tune will set you back nearly as much. More power, yes, but nowhere near the same reliability.

I’m already rocking a turbo kit so hopefully it’ll bolt up. My car has 130k miles with almost all of them turbo’d so it’s getting a little tired. I’m just looking at options for a new engine in the not too distant future.

[tomm.brz]

Originally Posted by new2subaru

FA24 is 228HP. It's not a rocket by any stretch. People will be adding FI to these too if they want any real power.

A header tune on the FA20 will almost get you to the FA24. I haven't driven one but I expect the GR86 to be a lot of new car hype. Let's see what happens when the dust settles.

MY car is SlOw... lol

..no..
a header tune wont brnng you to the gr86

[alex87f]

Originally Posted by new2subaru

FA24 is 228HP. It's not a rocket by any stretch. People will be adding FI to these too if they want any real power.

A header tune on the FA20 will almost get you to the FA24. I haven't driven one but I expect the GR86 to be a lot of new car hype. Let's see what happens when the dust settles.

MY car is SlOw... lol

FA20 is rated at 197hp with dyno #s around 190 at the crank
FA24 is rated at 228hp but dynoes around 245-250 at the crank

Quite a difference.