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Old 09-12-2019, 02:00 AM   #1
F1SC
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Default Does anyone here regularly track an FA20 WRX?

Hi all,

I currently have a Golf 7R, but am looking at moving to either a 17+ WRX or an STI, Iím almost certain Iíll go for a WRX as I just have more confidence in the FA20 (have previously owned an EJ25). I will most likely upgrade the J pipe and get a tune, as well as upgraded pads and fluid and will do plenty of track days and events.

-does anyone here regularly track their FA20 WRX? How does it hold up? Any particular issues or things to be aware of?

-Are the standard brakes and suspension adequate with upgraded pads and fluid?

-how does the WRX perform on track with open diffs? It is really that compromised compared to an STI? It appears the AU version of the WRX has a viscous rear LSD standard, is that similar to the STI?

-Would love to see some YouTube videos if you have any!

Cheers
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Last edited by F1SC; 09-12-2019 at 05:34 AM.
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Old 09-12-2019, 07:09 AM   #2
Straight6
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RacecarWRX has a great YT channel

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Old 09-13-2019, 03:17 AM   #3
RacecarWRX
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Quote:
Originally Posted by F1SC View Post
Hi all,

I currently have a Golf 7R, but am looking at moving to either a 17+ WRX or an STI, Iím almost certain Iíll go for a WRX as I just have more confidence in the FA20 (have previously owned an EJ25). I will most likely upgrade the J pipe and get a tune, as well as upgraded pads and fluid and will do plenty of track days and events.

-does anyone here regularly track their FA20 WRX? How does it hold up? Any particular issues or things to be aware of?

-Are the standard brakes and suspension adequate with upgraded pads and fluid?

-how does the WRX perform on track with open diffs? It is really that compromised compared to an STI? It appears the AU version of the WRX has a viscous rear LSD standard, is that similar to the STI?

-Would love to see some YouTube videos if you have any!

Cheers
There's definitely a group of us tracking the fa20 motor.

The biggest issues will be oil and coolant temps. If your on 91/93 octane you oil and coolant temps will get sky high. E85 will bring it down but it's recommended to run an oil cooler. As for coolant, I've managed to just run the heater to help keep temps in check. Really sucks in 100F days but... I'm already cooking anyway.

The stock suspension is very track worthy. Brakes, as you mentioned, pads and fluid. Pads chosen in accordance with the grip you have available.

Monitoring data is helpful. Personally I think oil pressure, oil temp, and coolant are a bare minimum.

As for the open diff/viscous question.i never tracked my WRX with an open diff, so I can't answer that question. The clutch lsd has been great.a viscous lsd probably won't last long but might as well abuse it then switch it to a clutch pack lsd.





Quote:
Originally Posted by Straight6 View Post
RacecarWRX has a great YT channel

http://www.youtube.com/watch?v=n3ZM5IGBctQ
Thanks! There are plenty more track videos on there as well. Some boring some interesting. I just post everything because I don't know what people want to see.
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Old 09-13-2019, 08:31 AM   #4
F1SC
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Quote:
Originally Posted by RacecarWRX View Post
There's definitely a group of us tracking the fa20 motor.

The biggest issues will be oil and coolant temps. If your on 91/93 octane you oil and coolant temps will get sky high. E85 will bring it down but it's recommended to run an oil cooler. As for coolant, I've managed to just run the heater to help keep temps in check. Really sucks in 100F days but... I'm already cooking anyway.

The stock suspension is very track worthy. Brakes, as you mentioned, pads and fluid. Pads chosen in accordance with the grip you have available.

Monitoring data is helpful. Personally I think oil pressure, oil temp, and coolant are a bare minimum.

As for the open diff/viscous question.i never tracked my WRX with an open diff, so I can't answer that question. The clutch lsd has been great.a viscous lsd probably won't last long but might as well abuse it then switch it to a clutch pack lsd.







Thanks! There are plenty more track videos on there as well. Some boring some interesting. I just post everything because I don't know what people want to see.
Mate, thank you so much for your reply! Some awesome info there. Hopefully some more people in the FA20 track ďgroupĒ reply, or share there YouTube channels/builds.

Do you have a build page so I can see what you have done?

Also, why didnít you go the STI from the start?
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Old 09-13-2019, 10:32 AM   #5
5nafu
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I haven't tracked my '18 WRX but I am next month. For me I went WRX over the STI because of the pricing and the WRX as a DD w/ track use car is just better for me. in the DMV we don't get to go fast a lot but there's a lot of quick acceleration and IMO 0-40mph WRX > STI. Also, I don't plan on going to the track every weekend for long stretches at a time so the Brembo brake package would have been a waste on me.

MyWRX channel on youtube has tracked his FA20. MachV owner owns a FA20 WRX and they go to summit point all the time.
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Old 09-13-2019, 12:53 PM   #6
RacecarWRX
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Quote:
Originally Posted by F1SC View Post
Mate, thank you so much for your reply! Some awesome info there. Hopefully some more people in the FA20 track ďgroupĒ reply, or share there YouTube channels/builds.

Do you have a build page so I can see what you have done?

Also, why didnít you go the STI from the start?
The build list is here:
https://forums.nasioc.com/forums/showthread.php?t=2898794

Originally the car was a daily driver. The WRX had way better gas mileage. But over time I started to get modified to what it is today. The car still has full interior, can carry 5 people and has a full trunk. It is still a dual purpose car just a lot quicker than stock.
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Old 09-13-2019, 09:20 PM   #7
killadawg
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I tracked mine for 2 yrs. Then moved to rallyX.. the car got fully modified, yet it was in stages.

First was Stage 2+ power mods on stock drivetrain 2016 Premium with inverted struts. : car felt much better, especially the power delivery. Cornering on open diffs, and stock tires needed some TLC. Trans fought me hard, never had a trans that was so easy to money shift with!! 1-2-3 always sucked and 5 -4 I'd always miss shift. Car was not entirely grounded and on would overheat after a short period of running hard brakes started fading after a full day.

Second:
Added all new hard bushings, SuperPro Front LCA, WL anti lift kit @ larger F&R sway bar w/adjustable endlinks, RCE Gtworks with RCE springs, RLCA Velox, transmission bushings and Perrin trans and engine mounts. Perrin Oil Cooler, upgraded to AP Radicals front BBK ferrodo ds3k pads and added Volk ZE40 wheels wrapped in Re71r tires. Upgraded to better Brake fluid and added SS lines (Also did all the trans mods for wrx 6sp..)

What a difference, I felt super grounded and shaved 4.5 seconds off my times on my first run without even trying (tires was probably the biggest help) braking took some getting used to with huge brakes and grippy tires! Still money shifting sloppy and grindy gears.. getting into 2nd I had to almost stop the car so it would go in. Almost toasted my engine with a money shift.. I got pissed off at my trans.

Third:
Did a complete Sti Dccd drivetrain swap with MapDccd with Advanced VSS setup with CF drive shaft and added some cusco bracing, rear carrier for the R180 and upgraded to a CFS radiator, and cusco 1.5 way lsd rear. Added camber bolts for more aggressive setttings..

Omg what a difference, I wish I would have done the trans swap first! Lsd took some getting used to as I had tons more power on my corners, now I felt super grounded and no overheating. Seriously felt amazing.

Four:
I couldn't leave things alone (should have)..
Switched to rallyX: added skidplates, blew up my rear end 2x... broke off front bumper and whatever was attached to it :-).. got power hungry, build a closed deck block.. added WMI, ripped out most interior stuff and radio etc.. went with almost solid mounts, solid subframe bushings, custom rally coils on hard springs, etc.. now I have a loud and very uncomfortable ride..

Well she overheats on hill climbs (not cool), have serious issues with rear LSD.. building a FA24DIT with IBR Brz runners, adding custom intake with PI with a M142 Motec ecu..
It's lots of fun, enjoy.. it gets addicting, you've been warned
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Old 09-14-2019, 10:16 PM   #8
gtsilver944
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What issues were you running into with the LSD? Overheating?
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Old 09-15-2019, 12:03 AM   #9
killadawg
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Originally Posted by gtsilver944 View Post
What issues were you running into with the LSD? Overheating?
Yes, over heating and binding.. binding so bad it was like my axle cv joints had gone. On turns it was terrible. Started with just low speed turns, then it was at just about any speed. It gets scary doing a fast turn and, pop, pop, jerk and the whole car felt like it was gonna self destruct.
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Old 09-15-2019, 02:31 AM   #10
RacecarWRX
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Quote:
Originally Posted by killadawg View Post
Yes, over heating and binding.. binding so bad it was like my axle cv joints had gone. On turns it was terrible. Started with just low speed turns, then it was at just about any speed. It gets scary doing a fast turn and, pop, pop, jerk and the whole car felt like it was gonna self destruct.
How do you have it configured and what fluid are you running?
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Old 09-15-2019, 09:13 AM   #11
KillerBMotorsport
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Quote:
Originally Posted by killadawg View Post

...and upgraded to a CFS radiator,


Well she overheats on hill climbs (not cool),
Just an FYI if you end up addressing the cooling issue. We make the most badass radiator you can put on a Subaru. It comes at a price, but there is no better product out there.

Our first independent tester was from Dubai and the car is 650 whp (STi) dedicated caged, slicks, etc... racecar. It runs in the desert, on hill climbs, with a HUGE FMIC and the A/C blasting the entire way. He has gone through several aftermarket 'racing' radiators that would not keep things cool under his conditions, before coming across ours. He's a happy customer now. Cool in the car and actually able to tweak the tune a bit as his temps are consistently lower than previously. I can pass on his info via PM if anyone is interested in reaching out to a fellow track guy for feedback. We do have an FA20 WRX version as well.

I would also definitely recommend an oil cooler as well as the FA20WRX can run hotter than the older EJs. The target oil temp sweet spot range for track use is going to be in the 210-240 degree range. 250 is when you start to be more watchful and 260 is when to lift and take a cool down lap. This is assuming you're running a good quality oil specific to your application.
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Old 09-15-2019, 01:20 PM   #12
RacecarWRX
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Quote:
Originally Posted by KillerBMotorsport View Post
Just an FYI if you end up addressing the cooling issue. We make the most badass radiator you can put on a Subaru. It comes at a price, but there is no better product out there.

Our first independent tester was from Dubai and the car is 650 whp (STi) dedicated caged, slicks, etc... racecar. It runs in the desert, on hill climbs, with a HUGE FMIC and the A/C blasting the entire way. He has gone through several aftermarket 'racing' radiators that would not keep things cool under his conditions, before coming across ours. He's a happy customer now. Cool in the car and actually able to tweak the tune a bit as his temps are consistently lower than previously. I can pass on his info via PM if anyone is interested in reaching out to a fellow track guy for feedback. We do have an FA20 WRX version as well.

I would also definitely recommend an oil cooler as well as the FA20WRX can run hotter than the older EJs. The target oil temp sweet spot range for track use is going to be in the 210-240 degree range. 250 is when you start to be more watchful and 260 is when to lift and take a cool down lap. This is assuming you're running a good quality oil specific to your application.
I want this radiator. Been eyeing it since you've told me about it.
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Old 09-15-2019, 04:58 PM   #13
killadawg
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Quote:
Originally Posted by RacecarWRX View Post
How do you have it configured and what fluid are you running?
Cusco 80w-140 Diff fluid.. and yes I'm thinking I need that KB rad.. need to solve some other life happenings before I finish this car, everything is in boxes waiting :-).. new job, new house, new pet... etc... car is on the back burner for now. I'm also looking into running cooling for the rear diff and wanted a dry sump oiling solution for the FA24DIT. This is going to be a rallyX specific build. I want a car that doesn't break everytime I run it hard :-)..
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Old 09-15-2019, 06:00 PM   #14
RacecarWRX
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Quote:
Originally Posted by killadawg View Post
Cusco 80w-140 Diff fluid.. and yes I'm thinking I need that KB rad.. need to solve some other life happenings before I finish this car, everything is in boxes waiting :-).. new job, new house, new pet... etc... car is on the back burner for now. I'm also looking into running cooling for the rear diff and wanted a dry sump oiling solution for the FA24DIT. This is going to be a rallyX specific build. I want a car that doesn't break everytime I run it hard :-)..
100% lock?

During a 20 min session I can peak upwards of 280F. Generally where I call it time to cool down. I spoke with Cusco and was told 100% lock will help bring temps down. Max temp is 300F with a pumpkin casing max temp of 320F. My diff is currently set at 80% and I'm just too lazy to pull it. My temp sender is on the fill plug so I don't know how that reads compared to pumpkin temp so I just say 280 is were I call a quits.
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Old 09-15-2019, 08:06 PM   #15
nunzWRX
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What makes you want to go from a Golf R to a WRX or STI?
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