FA24D (new GR86) into FRS GEN 1

[new2subaru]

Originally Posted by alex87f

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.

There's a difference for sure. But, does it move the car out of the "slow car" category. I've already seen one video that described the car as "boring" without F1.

As far as I know the FA20 is 175 WHP and the FA24 205-210WHP. Quite a difference but enough to call the car fast? I don't think so. A header tune on a FA20 would get you close enough IMO.

I drive a FR-S and am fine with the power. The engine is untouched. That's not to say I won't add power

[new2subaru]

Originally Posted by tomm.brz

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

I said almost

[x808drifter]

Originally Posted by alex87f

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.

Are you just pulling these number out your ass?
The normal non-tuned dyno is in the 170WHP range with 145-50 WTQ.
Which would put it at about it's stated from Toyota/Subaru power of 200HP.
Every time a manufacture says HP numbers its always at the crank unless they specify it's wheel horsepower.

[tomm.brz]

Originally Posted by new2subaru

I said almost

not even close

the new one dynoes 45-50 HP more with same fuel
you dont gain that much even with headers , tune and E85
You are lucky if you get to FA24 realm with a stock HKS supercharger kit mounted in the FA20

[alex87f]

Originally Posted by x808drifter

Are you just pulling these number out your ass?
The normal non-tuned dyno is in the 170WHP range with 145-50 WTQ.
Which would put it at about it's stated from Toyota/Subaru power of 200HP.
Every time a manufacture says HP numbers its always at the crank unless they specify it's wheel horsepower.

Wow. Thanks for the kind words, stranger.

We can argue about actual crank hp for an 86 till the cows come home, but the point is there's about 40whp difference between the two.

Some data: https://docs.google.com/spreadsheets...JJI/edit#gid=0

[kmbkk]

Originally Posted by alex87f

That's without the block, right?

To be accurate, it's an FA24 short block and they use your existing heads (so FA20 heads).

There are a couple of other companies working on this swap as well (RS Motors and CSG) that I know of. Hopefully we'll get more info and see more of these swaps in he future. I also reached out to PTuning about doing this swap since they're right down the road from me. They're going to research it to see if it's something they'd be interested in pursuing. It would be nice to have a shop on the East Coast doing the swap.

[alex87f]

Originally Posted by kmbkk

To be accurate, it's an FA24 short block and they use your existing heads (so FA20 heads).

There are a couple of other companies working on this swap as well (RS Motors and CSG) that I know of. Hopefully we'll get more info and see more of these swaps in he future. I also reached out to PTuning about doing this swap since they're right down the road from me. They're going to research it to see if it's something they'd be interested in pursuing. It would be nice to have a shop on the East Coast doing the swap.

Didn't that result in a silly compression ratio? Did they figure that one out?

[new2subaru]

Originally Posted by tomm.brz

not even close

the new one dynoes 45-50 HP more with same fuel
you dont gain that much even with headers , tune and E85
You are lucky if you get to FA24 realm with a stock HKS supercharger kit mounted in the FA20

C'mon. Even the CARB legal Vortech kit is around 300hp crank and 245whp. No way a stock FA24 will make than much power.

Like i said, we'll see what happens when the dust clears. There aren't that many out there yet.

If/when I blow my motor I'd be stupid not to put a fA24 block in it though. I'm following this thread to see how feasible it is. There will be a kit offered at some point.

[PulsarBeeerz]

Originally Posted by new2subaru

If/when I blow my motor I'd be stupid not to put a fA24 block in it though. I'm following this thread to see how feasible it is. There will be a kit offered at some point.

I don’t think they could offer a kit since they have to machine the heads to match the larger bore of the FA24.

[RedReplicant]

ASM already sells K24 S2000 swaps that ship on a pallet, motor prepped and ready to drop in. It wouldn't surprise me if they ended up doing FA24 swaps the same way.

[new2subaru]

Originally Posted by alex87f

Wow. Thanks for the kind words, stranger.

We can argue about actual crank hp for an 86 till the cows come home, but the point is there's about 40whp difference between the two.

Some data: https://docs.google.com/spreadsheets...JJI/edit#gid=0

Thank you for the link. The average WHP being 213.

[new2subaru]

Originally Posted by RedReplicant

ASM already sells K24 S2000 swaps that ship on a pallet, motor prepped and ready to drop in. It wouldn't surprise me if they ended up doing FA24 swaps the same way.

Yes, this is what I was getting at. There would be a big market for it.

[kmbkk]

Originally Posted by alex87f

Didn't that result in a silly compression ratio? Did they figure that one out?

They wouldn’t give me any further details. I assume they worked it out before offering swap packages, but I don’t have proof of it unfortunately

[x808drifter]

Originally Posted by alex87f

Wow. Thanks for the kind words, stranger.

We can argue about actual crank hp for an 86 till the cows come home, but the point is there's about 40whp difference between the two.

Some data: https://docs.google.com/spreadsheets...JJI/edit#gid=0

You're welcome.
I wasn't arguing differences in HP between the two engines.
I asked where these numbers even came from.

Originally Posted by alex87f

FA20 is rated at 197hp with dyno #s around 190 at the crank

I have seen manufactures overrate power numbers before. The SVT Mustang and RX8 are a few. But I have never seen someone rate an engine at one level and then give a lower number for at the crank power.
The crank power IS the engine horse power so WTF is that 197hp?