Another 15 fa20 swap - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ikeryder13 · 07-03-2023, 01:19 AM

I am just trying to have a few questions answered.

I have a 13 brz that I am swapping a 15 JDM brz engine both manual trans.

1. If I have the 15 harness can I just use that?
2. Are there any other major things I need to change during the swap?
3. Is there any issues with the clutch or transmission that need to be addressed?

Thank you so much for the help guys

NoHaveMSG · 07-03-2023, 11:24 AM

Yes
No
No

soundman98 · 07-03-2023, 02:17 PM

technically on #3, if you're at/over 60k miles, or on the original throwout bearing, there's a revised version that's now out-- if you've got it out, i'd recommend changing it.

there's also the battlespace garage throwout bearing and verus clutch fork...

NoHaveMSG · 07-03-2023, 03:31 PM

I guess I should elaborate that if you are using the 15' harness you need to use the 15' coil packs too.

ikeryder13 · 07-03-2023, 10:38 PM

Does it matter if it's a JDM motor? Thanks everyone for your advice

soundman98 · 07-03-2023, 10:48 PM

i don't recall any difference regionally. just double check all the emission stuff is in place.

there is a difference between a manual and automatic car with a vacuum pump for the brakes on the auto's. not sure how complete your motor/harness is going to be.

ikeryder13 · 07-04-2023, 05:29 PM

Quote:

Originally Posted by soundman98

i don't recall any difference regionally. just double check all the emission stuff is in place.

there is a difference between a manual and automatic car with a vacuum pump for the brakes on the auto's. not sure how complete your motor/harness is going to be.

It says everything but the transmission. I was considering getting. The transmission also but if its not necessary I won't spend the money

ikeryder13 · 11-04-2023, 06:22 PM

So I am finally about to do this guys. Can anyone let me know about the ecu? Can I use my 13 ecu? Also if I am using the 15 transmission will I need anything extra? Found a great deal on both combined

x808drifter · 11-05-2023, 12:44 AM

So quick question.
Why did you get a "JDM" motor.
Was it super cheap as compared to a regular one? (since there is basically no difference between the two)
Or did you get suckered?
I ask because ALL of the blocks where I add "JDM" to it are hella overpriced.
And since you live in Cali according to your location.
A typical running good longblock is only like 2-2.5k max. A built one 4-5k.

This isn't the 90's and this isn't a B16/B18 where those people only wanted the "JDM" motors for the small bump in compression because the engines were so close in price where building and bumping the compression would usually end up costing more.

ikeryder13 · 11-05-2023, 02:16 AM

No I didn't get the JDM one. I just didn't know if it was preferred. I also wanted a 15 motor vs the 13 motor due to some of the recall issues that were bopefully fixed by that year. I have seen no long blocks that cheap. If you know someone who has one that has under 65k miles I would buy it. Out here even on Ebay everything is 3500 to 6k for that engine.

EndlessAzure · 11-05-2023, 09:33 PM

Quote:

Originally Posted by ikeryder13

So I am finally about to do this guys. Can anyone let me know about the ecu? Can I use my 13 ecu? Also if I am using the 15 transmission will I need anything extra? Found a great deal on both combined

Your original ECU is fine. No computers need to be changed

Nothing is appreciably different to the chassis if you have complete assembly with harness

07-03-2023, 01:19 AM	#1
ikeryder13 Senior Member Join Date: Oct 2013 Drives: 2013 GBS BRZ Location: Rialto, ca Posts: 583 Thanks: 3 Thanked 25 Times in 25 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	Another 15 fa20 swap I am just trying to have a few questions answered. I have a 13 brz that I am swapping a 15 JDM brz engine both manual trans. 1. If I have the 15 harness can I just use that? 2. Are there any other major things I need to change during the swap? 3. Is there any issues with the clutch or transmission that need to be addressed? Thank you so much for the help guys

07-03-2023, 10:48 PM	#6
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,673 Times in 6,781 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	i don't recall any difference regionally. just double check all the emission stuff is in place. there is a difference between a manual and automatic car with a vacuum pump for the brakes on the auto's. not sure how complete your motor/harness is going to be. __________________ "The time you enjoy wasting is not wasted time"

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07-03-2023, 02:17 PM	#3
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,673 Times in 6,781 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	technically on #3, if you're at/over 60k miles, or on the original throwout bearing, there's a revised version that's now out-- if you've got it out, i'd recommend changing it. there's also the battlespace garage throwout bearing and verus clutch fork... __________________ "The time you enjoy wasting is not wasted time"

07-03-2023, 10:38 PM	#5
ikeryder13 Senior Member Join Date: Oct 2013 Drives: 2013 GBS BRZ Location: Rialto, ca Posts: 583 Thanks: 3 Thanked 25 Times in 25 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	Does it matter if it's a JDM motor? Thanks everyone for your advice

11-04-2023, 06:22 PM	#8
ikeryder13 Senior Member Join Date: Oct 2013 Drives: 2013 GBS BRZ Location: Rialto, ca Posts: 583 Thanks: 3 Thanked 25 Times in 25 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	So I am finally about to do this guys. Can anyone let me know about the ecu? Can I use my 13 ecu? Also if I am using the 15 transmission will I need anything extra? Found a great deal on both combined

11-05-2023, 12:44 AM	#9
x808drifter LMGTFY Join Date: Mar 2016 Drives: 13 FRS, 91 Miata Location: Lava Town, HI Posts: 2,776 Thanks: 5,561 Thanked 3,646 Times in 1,625 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	So quick question. Why did you get a "JDM" motor. Was it super cheap as compared to a regular one? (since there is basically no difference between the two) Or did you get suckered? I ask because ALL of the blocks where I add "JDM" to it are hella overpriced. And since you live in Cali according to your location. A typical running good longblock is only like 2-2.5k max. A built one 4-5k. This isn't the 90's and this isn't a B16/B18 where those people only wanted the "JDM" motors for the small bump in compression because the engines were so close in price where building and bumping the compression would usually end up costing more.

11-05-2023, 02:16 AM	#10
ikeryder13 Senior Member Join Date: Oct 2013 Drives: 2013 GBS BRZ Location: Rialto, ca Posts: 583 Thanks: 3 Thanked 25 Times in 25 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	No I didn't get the JDM one. I just didn't know if it was preferred. I also wanted a 15 motor vs the 13 motor due to some of the recall issues that were bopefully fixed by that year. I have seen no long blocks that cheap. If you know someone who has one that has under 65k miles I would buy it. Out here even on Ebay everything is 3500 to 6k for that engine.

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