Supercharged FA24

[knapper]

Not sure if this has been posted, but I did a quick search for it and didn't find it.

Harrop's SC setup with FA24F:

[Frost]

Originally Posted by knapper

Not sure if this has been posted, but I did a quick search for it and didn't find it.

Harrop's SC setup with FA24F:

I get a little triggered everytime someone says the FA24 in the BRZ/GR86 is the Ascent motor... its technically not EXACTLY the same motor.

[Brz-123]

100% agree. Not the same motor.
Ascent motor is lower compression ratio , only direct injected and turbo from factory , FA24F

The BRZ one is higher comp ratio and dual injected NA. FA24D

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[knapper]

Agreed. He does clarify that it is the FA24F with lower compression though. I wonder how easy a swap would be, obviously being that it is already turbo from the factory, it is better suited for abuse.

[PulsarBeeerz]

The FA24F IS DI only buuut since our port injectors are in the IM assuming the FA20 IM ports line up with the block it doesn't matter. You would still end up with DI/PI that the FA20 ECU could handle just with a larger block. It can't possibly be as simple as swapping HW over from the FA20D to the FA24F right, right?

[wheelspeed]

Looks heavy. How much weight does that thing add to the car?

[nikitopo]

Originally Posted by Brz-123

100% agree. Not the same motor.
Ascent motor is lower compression ratio , only direct injected and turbo from factory , FA24F

The BRZ one is higher comp ratio and dual injected NA. FA24D

^^^
This. Not the same motor. One is build with FI in mind , the other not.

[alex87f]

Originally Posted by knapper

Agreed. He does clarify that it is the FA24F with lower compression though. I wonder how easy a swap would be, obviously being that it is already turbo from the factory, it is better suited for abuse.

Well people said the same thing of the WRX FA20 being an interesting swap into the 1st gen platform. 8-9 years later, no one's yet been able to make it run without a standalone ECU.

[Tatsu333]

In another thread (about a possible FA24D/FA20D hybrid block swap) where I asked about this (swapping an FA24F block instead), the response was:

Originally Posted by cactus

Turbo motors had the starter mounted differently and the case half wont accept the BRZ starter with the stock trans.

So it doesn't appear that an FA24F block swap is simple. FA24D blocks are not yet available from Subaru, but even those could be problematic since their literature said something about changing the engine mount locations...

[RedReplicant]

Also notice that the alternator is mounted backwards

[Irace86.2.0]

Originally Posted by RedReplicant

Also notice that the alternator is mounted backwards

This is custom for their time attack build and custom belt system. Looks like they have an Accusump style dry sump setup in the alternator spot and put the alternator reverse mounted down on the other side. The double pulleys are to run an eight cog pulley versus the standard six, and I think they are running a larger crank pulley to make more boost because they already maxes out how small they can make the supercharger pulley.

[Irace86.2.0]

Originally Posted by wheelspeed

Looks heavy. How much weight does that thing add to the car?

60lbs I think. The extra 200hp can offset the weight fairly easy.