FA24D (new GR86) into FRS GEN 1

[Celigts]

I’ve seen some older threads…people converting to talking about KSWAPS etc.

Keeping it strictly about the FA24D, what’s needed?

New ECU? Sensors?
1st Gen Transmission will work?

Looks like the exhaust mounting points are the same so I can keep my PTuning headers 💪


No one bring up Kswap bullshit. If I wanted a Honda I’d buy a Honda.

I want more power in the first Gen and this is the answer (hopefully).
Boost comes later but the goal is FA24D swap.


What’s the requirements?

🙏

[RedReplicant]

There is a thread right below yours for this https://www.ft86club.com/forums/showthread.php?t=147462

Also, the answer is that no one knows what is required for the motor yet. First gen transmission will work.

[Celigts]

Originally Posted by RedReplicant

There is a thread right below yours for this https://www.ft86club.com/forums/showthread.php?t=147462

Also, the answer is that no one knows what is required for the motor yet. First gen transmission will work.

That one’s talking about building one out using an FA20. I guess that’s helpful but I just wanna know if the mounting points are the same and It’s an ECU issue/sensor issue mainly.

Saw on eBay the motor and trans were $7500.

Seems like a rip off. Hopefully I can get my hands on one and figure it out.

[Irace86.2.0]

Won’t work. Get a K24 and do a kswap.

[Ebush]

If you want an fa24 get a gr86...

[botbs]

Just wait for a few years

[Kylejc1219]

From what I’ve researched doing the fa24 long block swap is very similar to converting from 13 to a 17 engine. The transmission and everything works just fine, but it’s the small changes that are the problem. For example the trigger wheel, camshaft position sensors, etc. they are slightly different to the point where it makes the swap very tedious and annoying. If you got the fully assembled long block with appropriate harness and ecu there’s a good chance it should be no problem, but nothing is concrete yet.

Tbh I was very interested in the fa24 swap until I realized that there are just too many unknowns to make it worth it at this point. Unless your racing in a class which having a fa24 is legal but a k24 or FI isn’t then honestly just stick to the fa20 for now. With time this swap will become more feasible.

[jeepmor]

You're wasting you're own time and money for 20-30 more horsepower that still doesn't have the internals (rods) to support a full tilt turbo or supercharger upgrade. Meanwhile, I'm over here with an HKS supercharger feeling pretty good.

[Irace86.2.0]

Originally Posted by jeepmor

You're wasting you're own time and money for 20-30 more horsepower that still doesn't have the internals (rods) to support a full tilt turbo or supercharger upgrade. Meanwhile, I'm over here with an HKS supercharger feeling pretty good.

The reason someone might want to do a swap would be because the FA24 has more potential for high horsepower due to the extra displacement that would be more difficult with the FA20, because the FA24 will have more turbo response, because the FA24 has more reliability at a given horsepower, because of better heat management for a given horsepower, or because it may be cheaper.

I say it may be cheaper because to get the predicted reliability for a given horsepower, the FA20 might require internal upgrades, where the FA24 might be fine from the factory. For instance, the 350whp/275wtq seems to be about the limit for the FA20, so for many people, even if they don't want more power, they may try to stay significantly below that, or they may do a built engine, which isn't disable or cheap, respectively. The FA24 due to the extra displacement will make 350whp with less boost, and it is starting with significantly beefier Pistons and rods, so the reliability factor in theory should be much higher.

If the swap was reasonable then I would have considered it over the K24.

[botbs]

https://www.facebook.com/GARAGE86MALAYSIA/

Here you go!

[Eaton PSI]

Originally Posted by Irace86.2.0

The FA24 due to the extra displacement will make 350whp with less boost, and it is starting with significantly beefier Pistons and rods, so the reliability factor in theory should be much higher.

Do you know if the FA20 and FA24 pistons use the same pin diameter and pin height? That FA24 piston looks a lot like a FB25 piston. I wonder if its the same? Both 94mm...

I'm interested in fitting new sleeves to an FA20 to run the 94mm pistons

[Eaton PSI]

I think this is an FB25D piston. It's the only picture I've been able to find.

[Irace86.2.0]

Originally Posted by Eaton PSI

Do you know if the FA20 and FA24 pistons use the same pin diameter and pin height? That FA24 piston looks a lot like a FB25 piston. I wonder if its the same? Both 94mm...

I'm interested in fitting new sleeves to an FA20 to run the 94mm pistons

I have no idea. Check the part numbers

[Nick Dugdale]

Originally Posted by Irace86.2.0

Won’t work. Get a K24 and do a kswap.

It has been done in 2022 and does work.

Swapping a Honda K24 into the 86 has been nothing but a disaster chasing problem after problem and personally witnessing about a dozen blow up in S2000's, NB Miatas and 86's since last year.

Also the FA motors were never designed to withstand forced induction applications. These are free revving NA motors designed with light weight internals.