Likely the first FA2/4 hybrid incoming

[Irace86.2.0]

Originally Posted by redlined600

I guess I'll be the first to ask, how much for the short-block?

https://parts.subaru.com/a/Subaru_20...11-001-02.html

[Goingnowherefast]

Originally Posted by Irace86.2.0

https://parts.subaru.com/a/Subaru_20...11-001-02.html

That's actually really reasonable

[alphasaur]

Originally Posted by Goingnowherefast

That's actually really reasonable

A bargain compared to alternatives.

[ermax]

So it’s basically the same price as the FA20 short block. I got FA20 short block through a friend at a dealer for around 1800. I suspect the FA24 could be had for similar discounts if you know the right person.

[FrickingReallySlow]

Curious about @Opie plan for the heads to get compression back to 12.5 The FA20 heads will actually introduce a quench/squish area when paired with bigger bore of FA24 (which I guess can be desirable for velocity and mixturing). Probably also need a head CC kit to get compressed volume even across all 4 heads if material is taken out.

[alex87f]

Originally Posted by Goingnowherefast

That's actually really reasonable

Surprisingly so. Probably looking at three grand once you account for the ancillaries. Then what else do you need?

-Header, if you're still stock?
-Tune? Which might become available off-the-shelf in the not-too-distant future

If that works out, it might yield 250 OEM-like hp for the price of a decent supercharger. N/A, with a "new" engine, higher reliability and less weight.

Speaking of which, interested in seeing the weight penalty between FA24 & FA20 short blocks. Probably less than an FI kit anyway.

[ermax]

Originally Posted by alex87f

Speaking of which, interested in seeing the weight penalty between FA24 & FA20 short blocks. Probably less than an FI kit anyway.

I doubt it’s much more. I guess the steel sleeves are larger but could that really add up that much?

[Opie]

Originally Posted by BrahmaBull1990

This was my biggest concern. I have an Edelbrock and it is going to be tough if it doesn’t match up. I suppose I could sell my FA20 Edelbrock to finance the FA24 short block and machining, then add another PD SC down the road.

Decisions, decisions….
@Opie Are you considering the upgraded transmission, too?

Not until/unless the current one breaks

[Ashikabi]

Originally Posted by alex87f

Surprisingly so. Probably looking at three grand once you account for the ancillaries. Then what else do you need?



-Header, if you're still stock?

-Tune? Which might become available off-the-shelf in the not-too-distant future



If that works out, it might yield 250 OEM-like hp for the price of a decent supercharger. N/A, with a "new" engine, higher reliability and less weight.



Speaking of which, interested in seeing the weight penalty between FA24 & FA20 short blocks. Probably less than an FI kit anyway.

I'm gonna assume the weight penalty is approximately one large dump after taco night.

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[nikitopo]

Is it not the FA24 short-block longer? Hope you don't have clearance issues.

[Goingnowherefast]

Originally Posted by nikitopo

Is it not the FA24 short-block longer? Hope you don't have clearance issues.

No. It should be the exact same size externally.

[Brz-123]

Originally Posted by nikitopo

Is it not the FA24 short-block longer? Hope you don't have clearance issues.

It has the same casting and same stroke , no change. Only bored wider.

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[Goingnowherefast]

The question here is will it use the same CPS (crank position sensor). That's another critical sensor you'll need to determine engine position. If it is different, it may be possible to swap the gen 1 sensor in.

[Ashikabi]

Originally Posted by Brz-123

It has the same casting and same stroke , no change. Only bored wider.

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Shouldn't the FA20 headers fit then?

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