FA24D (new GR86) into FRS GEN 1 - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ka-t_240 · 05-22-2023, 05:27 PM

There is a FA24 short block swap running in MN. Car is using FA20 heads and ECU. Made almost identical HP to a stock GR86 on the same dyno.

I believe the car was on track this weekend too.

tomm.brz · 05-23-2023, 02:46 AM

Still i m not understanding how doable is this swap, fa24 short block into restyling fa20 with fa20 heads?
Did someone here figure out what s really needed?

ka-t_240 · 05-23-2023, 11:36 AM

Quote:

Originally Posted by tomm.brz

Still i m not understanding how doable is this swap, fa24 short block into restyling fa20 with fa20 heads?
Did someone here figure out what s really needed?

Yes - I am sure he wants to do more testing before posting it all up. But, its a shop in MN.

tomm.brz · 05-23-2023, 11:48 AM

would be nice to have some details about how to make it work(:

RedReplicant · 05-23-2023, 12:44 PM

RSMotors, if you want to creep their FB

Irace86.2.0 · 05-23-2023, 05:48 PM

My concerns would be valve clearance. Are the valves the same diameter and in the same position and angle on both motors? The piston crowns are different between the two motors. I could imagine the valves being larger and maybe further apart on the FA24.

Besides that, the larger bore sleeve might partially block the coolant jackets on the FA20 heads.

tomm.brz · 05-23-2023, 06:10 PM

pistons hit the heads, yea but i dont what they did to fix that

RedReplicant · 05-23-2023, 06:58 PM

I came across some comments by Ronnie the other day about it, he said that you just gotta get creative and that he used FA20 heads. Can't find them now that I'm looking though.

Sevs753 · 05-23-2023, 11:21 PM

The crank position sensor was asked about on their post but they were a big cagey and just said "they made it work". but it was done with a stock 2013 ECU so thats hopeful. We just have to figure out what they did.

ka-t_240 · 05-24-2023, 10:51 AM

Quote:

Originally Posted by RedReplicant

I came across some comments by Ronnie the other day about it, he said that you just gotta get creative and that he used FA20 heads. Can't find them now that I'm looking though.

That's why I didn't wanna say who it was, I'm guessing he is going to put something more formal together eventually on the process. But have seen pictures of them doing testing on clearances/etc for a while.

NoHaveMSG · 05-24-2023, 12:24 PM

Quote:

Originally Posted by Sevs753

The crank position sensor was asked about on their post but they were a big cagey and just said "they made it work". but it was done with a stock 2013 ECU so thats hopeful. We just have to figure out what they did.

Probably just stuck the 13' sensor on with a modified mount with the 13' reluctor wheel.

ka-t_240 · 06-24-2023, 12:45 AM

I believe RS has for sure 3 cars running with FA24 swaps, and another shop(ASM) did one in WI.

I believe one of the FA24 cars will be at Gridlife this weekend running in club TR

Celigts · 10-20-2023, 11:16 AM

Just remembered I posted this a while ago. Who’s got a guide? I want to pull the trigger on buying a GR86 engine. 😊

T-Steve · 10-21-2023, 03:15 PM

Same here - the price on used FA24s seem to have cooled off some and I'm interested in swapping to my '14.

I found this guide on NASIOC. It's specific to the FA24DIT, but there is useful information there.
https://docs.google.com/document/d/1...qrl9R-vJA/edit

I'm following this outfit in Japan. There are some more clues there.
https://docs.google.com/document/d/1...qrl9R-vJA/edit

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.

Quote:

Originally Posted by Celigts

Just remembered I posted this a while ago. Who’s got a guide? I want to pull the trigger on buying a GR86 engine. 😊

05-23-2023, 12:44 PM	#19
RedReplicant Senior Member Join Date: Aug 2015 Drives: None Location: Arizona Posts: 944 Thanks: 1,507 Thanked 1,285 Times in 541 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	RSMotors, if you want to creep their FB __________________ 2015 Subaru BRZ - TT5 K24 Swap

05-23-2023, 05:48 PM	#20
Irace86.2.0 Senior Member Join Date: Mar 2017 Drives: Q5 + BRZ + M796 Location: Santa Rosa, CA Posts: 7,884 Thanks: 5,668 Thanked 5,807 Times in 3,300 Posts Mentioned: 70 Post(s) Tagged: 0 Thread(s)	My concerns would be valve clearance. Are the valves the same diameter and in the same position and angle on both motors? The piston crowns are different between the two motors. I could imagine the valves being larger and maybe further apart on the FA24. Besides that, the larger bore sleeve might partially block the coolant jackets on the FA20 heads. __________________ My Build \| K24 Turbo Swap \| K24T BRZ SOLD

05-23-2023, 06:58 PM	#22
RedReplicant Senior Member Join Date: Aug 2015 Drives: None Location: Arizona Posts: 944 Thanks: 1,507 Thanked 1,285 Times in 541 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	I came across some comments by Ronnie the other day about it, he said that you just gotta get creative and that he used FA20 heads. Can't find them now that I'm looking though. __________________ 2015 Subaru BRZ - TT5 K24 Swap

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05-22-2023, 05:27 PM	#15
ka-t_240 Senior Member Join Date: May 2014 Drives: BRZ Location: Fargo, ND Posts: 968 Thanks: 124 Thanked 328 Times in 237 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	There is a FA24 short block swap running in MN. Car is using FA20 heads and ECU. Made almost identical HP to a stock GR86 on the same dyno. I believe the car was on track this weekend too.

05-23-2023, 02:46 AM	#16
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,218 Thanks: 504 Thanked 1,082 Times in 785 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	Still i m not understanding how doable is this swap, fa24 short block into restyling fa20 with fa20 heads? Did someone here figure out what s really needed?

05-23-2023, 11:48 AM	#18
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,218 Thanks: 504 Thanked 1,082 Times in 785 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	would be nice to have some details about how to make it work(:

05-23-2023, 06:10 PM	#21
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,218 Thanks: 504 Thanked 1,082 Times in 785 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	pistons hit the heads, yea but i dont what they did to fix that

05-23-2023, 11:21 PM	#23
Sevs753 Senior Member Join Date: Nov 2012 Drives: BRZ, Canyon Location: Metro Detroit Posts: 453 Thanks: 65 Thanked 136 Times in 86 Posts Mentioned: 1 Post(s) Tagged: 1 Thread(s)	The crank position sensor was asked about on their post but they were a big cagey and just said "they made it work". but it was done with a stock 2013 ECU so thats hopeful. We just have to figure out what they did.

06-24-2023, 12:45 AM	#26
ka-t_240 Senior Member Join Date: May 2014 Drives: BRZ Location: Fargo, ND Posts: 968 Thanks: 124 Thanked 328 Times in 237 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I believe RS has for sure 3 cars running with FA24 swaps, and another shop(ASM) did one in WI. I believe one of the FA24 cars will be at Gridlife this weekend running in club TR

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