Drivetrain Options - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Fenix · 01-12-2016, 09:52 PM

My end goal for the FA20 is approximately 600hp. I believe upgrading the drivetrain prior to rebuilding the engine is essential. What have you done? I

ed a lot only to find myself asking more questions.

Should I attempt to part something together or buy what is available?

Mr.ac · 01-12-2016, 10:30 PM

600hp eh? On the FA20. Well with time and money anything is possible.
You might want too look up the same trannies the V8 swap use.

Fenix · 01-12-2016, 11:19 PM

Quote:

Originally Posted by Mr.ac

600hp eh? On the FA20. Well with time and money anything is possible.
You might want too look up the same trannies the V8 swap use.

It is an ambitious long-term dream. I have thought about doing an engine swap. My local tuner shop advised against it; mainly due to potential problems I would discover the hard way over time. In all honesty, I am unsure where to begin. Before dropping cash on upgrades, I am trying to pinpoint the most logical place to start. I thought about buying an OS GIKEN rear diff. Not sure what kind of torque it can handle however. The axles would give out first. ...

ryoma · 01-13-2016, 12:01 AM

I think the main question is, why 600HP on this specific motor? you would probably have more luck on a higher displacement motor like an LS swap. I believe some people have already done a successful LS swap with everything working. someone even swapped over a GTR rearend onto the 86 lol. so anything is really possible, as long as you have the knowledge and funds

hmong337 · 01-13-2016, 12:22 AM

Anything over 300whp on pumpgas and you're best off with another engine/trans is what I've come to conclude.

..or better yet, another car!

KR-S · 01-13-2016, 03:00 AM

Quote:

Originally Posted by Fenix

It is an ambitious long-term dream. I have thought about doing an engine swap. My local tuner shop advised against it; mainly due to potential problems I would discover the hard way over time. In all honesty, I am unsure where to begin. Before dropping cash on upgrades, I am trying to pinpoint the most logical place to start. I thought about buying an OS GIKEN rear diff. Not sure what kind of torque it can handle however. The axles would give out first. ...

Your tuner advised against doing an engine swap because of potential problems, but thought nothing of 600hp on an FA20?

I would say find a new tuner.

crazyfrenchbiker · 01-13-2016, 05:33 AM

You can get a Samsonas sequential straight cut gearbox which is good for roughly 740ft/lbs for around $15,000 in the USA. Quaife also has a box that is priced similarly and good for 750BHP. Hollinger has the RD9 which is good for around 700ft/lbs and priced around $25,000.

You can also look at gear swaps. Velox has a 3rd and 4th gear billet swap which hasn't been proven but estimated to be 200-300% stronger. This means roughly 300-450 ft/lbs over stock.

There's PAR Engineering that is working with Jacks transmission to do a full straight cut dog box swap around 5-6K+ install.

Good luck with your build.

Fenix · 01-13-2016, 08:41 AM

Quote:

Originally Posted by KR-S 86

Your tuner advised against doing an engine swap because of potential problems, but thought nothing of 600hp on an FA20?

I would say find a new tuner.

I never mentioned my ambitious up to 600hp target. He was throwing out more realistic numbers such as 300whp. Weight reduction, upgrading/reinforcing drivetrain weak points, handling improvements... is a start until I decide what to do with the engine.

stevesnj · 01-13-2016, 09:21 AM

So what will you need to do with potentially 600 HP ? Drifting, 1/4 mile, DD

Fenix · 01-13-2016, 09:55 AM

Quote:

Originally Posted by stevesnj

So what will you need to do with potentially 600 HP ? Drifting, 1/4 mile, DD

> Street Legal 0-60
> Autocross
> Time Attack

I have no clue how to drift. Sounds fun.

-Phil · 01-13-2016, 10:02 AM

I would just build the FA20 put a 3076-3576 on the car. Do a Velox gear swap, change out the axles and go for whatever it is your trying to do.

mrk1 · 01-13-2016, 10:05 AM

^^^^ What this guy said, plenty of potential in these cars.

stevesnj · 01-13-2016, 11:16 AM

Quote:

Originally Posted by Fenix

> Street Legal 0-60
> Autocross
> Time Attack

I have no clue how to drift. Sounds fun.

Hey if you want it for all that its cool but why didn't you buy a different car?

Fenix · 01-13-2016, 11:30 AM

Quote:

Originally Posted by stevesnj

Hey if you want it for all that its cool but why didn't you buy a different car?

I liked the looks and potential. I had no intentions of keeping my FR-S stock. Swapping in a built LS engine is still on the table. A C6 Corvette was my second choice when I was looking to buy a vehicle. Still might buy one. lol

01-12-2016, 10:30 PM	#2
Mr.ac [insert cool phrase here] Join Date: Aug 2015 Drives: BRZ Premium Location: Central Coast CA Posts: 2,369 Thanks: 709 Thanked 1,558 Times in 930 Posts Mentioned: 30 Post(s) Tagged: 0 Thread(s)	600hp eh? On the FA20. Well with time and money anything is possible. You might want too look up the same trannies the V8 swap use. __________________ New daily driver - Subaru BRZ Premium Weekend fun/track car - '91 MR2 Turbo Gen3 Old daily driver - '88 MR2 Supercharged

01-13-2016, 12:01 AM	#4
ryoma Senior Member Join Date: Mar 2015 Drives: 2015 Subaru BRZ Limited CWP Location: SoCal Posts: 1,561 Thanks: 34 Thanked 669 Times in 469 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	I think the main question is, why 600HP on this specific motor? you would probably have more luck on a higher displacement motor like an LS swap. I believe some people have already done a successful LS swap with everything working. someone even swapped over a GTR rearend onto the 86 lol. so anything is really possible, as long as you have the knowledge and funds __________________ My 2015 CWP BRZ Build

01-13-2016, 12:22 AM	#5
hmong337 Emperor JDM Join Date: Jun 2013 Drives: '91 MR2 Gen3 3SGTE, '13 FRS Location: Onterrible, Canada Posts: 1,750 Thanks: 3,498 Thanked 909 Times in 495 Posts Mentioned: 20 Post(s) Tagged: 3 Thread(s)	Anything over 300whp on pumpgas and you're best off with another engine/trans is what I've come to conclude. ..or better yet, another car! __________________ Last edited by hmong337; 01-13-2016 at 01:07 AM.

01-13-2016, 09:21 AM	#9
stevesnj Senior Member Join Date: May 2013 Drives: 2016 FR-S Oceanic Blue Location: Southern NJ Posts: 2,958 Thanks: 2,158 Thanked 1,601 Times in 923 Posts Mentioned: 30 Post(s) Tagged: 2 Thread(s)	So what will you need to do with potentially 600 HP ? Drifting, 1/4 mile, DD __________________ My 2016 Build thread TRD Exhaust with custom quad tips, TRD Lowering Springs,TRD Quick shifter,LED;DRL, Projectors, and turn signals. Re-badge, 86 Nanny, WinmaxW2 Pads, K&N Drop In, Antenna delete

01-13-2016, 10:05 AM	#12
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 20 Post(s) Tagged: 2 Thread(s)	^^^^ What this guy said, plenty of potential in these cars. __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

01-13-2016, 05:33 AM	#7
crazyfrenchbiker Hot Lava 6MT Join Date: Jul 2012 Drives: Hot Lava FR-S Location: Omaha, NE Posts: 398 Thanks: 19 Thanked 78 Times in 60 Posts Mentioned: 12 Post(s) Tagged: 1 Thread(s)	You can get a Samsonas sequential straight cut gearbox which is good for roughly 740ft/lbs for around $15,000 in the USA. Quaife also has a box that is priced similarly and good for 750BHP. Hollinger has the RD9 which is good for around 700ft/lbs and priced around $25,000. You can also look at gear swaps. Velox has a 3rd and 4th gear billet swap which hasn't been proven but estimated to be 200-300% stronger. This means roughly 300-450 ft/lbs over stock. There's PAR Engineering that is working with Jacks transmission to do a full straight cut dog box swap around 5-6K+ install. Good luck with your build.

01-13-2016, 10:02 AM	#11
-Phil Senior Member Join Date: Nov 2015 Drives: Rb25 neo brz Location: NJ Posts: 210 Thanks: 129 Thanked 292 Times in 98 Posts Mentioned: 16 Post(s) Tagged: 5 Thread(s)	I would just build the FA20 put a 3076-3576 on the car. Do a Velox gear swap, change out the axles and go for whatever it is your trying to do.

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