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Official 3.6R Mod List


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All: Please post whatever information is relevant, and I can put it on the first page.

 

Hello all:

 

The purpose of this thread is to list mods for the 3.6R that do not overlap with mods that are available for the 2.5GT and the 2.5i. However, I will list Brakes at the bottom as there seems to be some interest.

 

This first post will be updated based on new posts/feedback from other members.

POWER:

 

Base Dyno

 

Base Dyno by fredrik94087 11/26/2013

204whp 210wtq on Superflow

http://legacygt.com/forums/showpost.php?p=4653302&postcount=16

 

Base Dyno by nadracer (afe supplied) 12/26/2013

209.5whp 215wtq on DynoJet

http://legacygt.com/forums/showpost.php?p=4680590&postcount=12

 

 

Intake

 

HKS Funnel and AEM filter by fredrik94087 12/09/2013

7whp 5wtq on Superflow

Gains across entire power band

http://legacygt.com/forums/showpost.php?p=4665115&postcount=1

 

Takeda 3.6R Intake by nadracer (afe supplied) 12/26/2013

8.5whp 5wtq on Dynojet

Gains between 5000 and 6000 rpm

http://legacygt.com/forums/showpost.php?p=4680590&postcount=12

 

HKS Funnel + AEM filter vs AFE/Takeda Intake + HKS Funnel by fredrik94087 01/23/2014

2.2whp and 3wtq. 7whp/7wtq at 5250 on Superflow. Gains everywhere.

Estimate 9whp and 8wtq with Takeda and HKS Funnel combo (subtracting exhaust)

http://legacygt.com/forums/showpost.php?p=4708057&postcount=1

 

AFE Pipe + Straight Pipe + AEM Cone vs AFE/Takeda intake + HKS Funnel by fredrik94087 04/09/2014

2.3whp and 2wtq. 3whp/3wtq at 5250 on Superflow. STP corrected.

Estimate 11whp and 11wtq with modified AFE intake (subtracting exhaust)

http://legacygt.com/forums/showpost.php?p=4787507&postcount=28

 

 

 

Throttle Body Upgrade

 

Boomba Racing 73mm STI TB by fredrik94087 03/07/2015

 

http://legacygt.com/forums/showthread.php/boomba-70mm-sti-tb-mated-3-6r-238155.html?p=5085059#post5085059

 

 

 

Exhaust

 

2.5" custom single exhaust by fredrik94087 12/16/2013

2whp 7wtq. ~3whp/3wtq at 5250 on Superflow. More gains down low.

http://legacygt.com/forums/showpost.php?p=4671757&postcount=5

 

 

 

Headers

 

Raptor EZ36 3.0 headers for 3.6R by Perscitus 02/05/2015

http://legacygt.com/forums/showpost.php?p=5057511&postcount=1209

 

http://raptorsc.com.au/subaru/subaru-libertylegacy-5gen-h6-3-6-ez36-header-kits/

 

Cats and Y pipe by Perscitus 05/28/2015

http://legacygt.com/forums/showpost.php?p=5158175&postcount=1626

 

 

 

Tune

 

EcuTek Tune for 2010 3.6R by Perscitus 04/02/2013

Hybrid intake and Magnaflow exhaust

21hp and 20tq using 93 octane at the crank on Mustang

http://legacygt.com/forums/showpost.php?p=4370247&postcount=1

 

EcuTek Tune for 2013 3.6R by fredrik94087 04/29/2014

Tuned map1 over AFE with straight tube and 2.5" single out exhaust

3.5whp and 7wtq using 91 octane on Superflow AWD dyno STP corrected...14.5whp and 15wtq using same tune as 91 octane but running 97 octane

http://legacygt.com/forums/showpost.php?p=4820576&postcount=78

 

Romraider link by ItalianLegacy

http://www.romraider.com/forum/viewtopic.php?f=8&t=8276

 

Open Source tune for 2011 3.6R by ItalianLegacy 01/16/2014

Invidia N1 Catback

30whp and ~25wtq. ~35whp/wtq at 5250 using 93 octane on Mustang

http://legacygt.com/forums/showpost.php?p=4701405&postcount=33

 

Open Source re-tune for 2011 3.6R by ItalianLegacy 01/28/2014

Adding AFE/Takeda intake to Invidia N1 Catback

Additional 20whp and ~12wtq and re-tune using 93 octane on Mustang

http://legacygt.com/forums/showpost.php?p=4713763&postcount=94

 

EcuTek Tune for 2013 3.6R by KFCConspiracy 05/25/2014

Takeda AFE intake and Invidia Q300 catback

??hp and ??tq using 93 octane

http://legacygt.com/forums/showpost.php?p=4830309&postcount=416

 

XRT Tuning by Timothy.B 12/07/2016

Homepage

http://www.xtremeracingtuning.com/forum/viewforum.php?f=101&sid=9440242d66ea60e358fb81f42e6bc18d

 

 

 

SUPERCHARGER

 

Raptor Supercharger Test-Fit by ItalianLegacy 05/23/2014

http://legacygt.com/forums/showpost.php?p=4829354&postcount=404

 

http://raptorsc.com.au/subaru/subaru-libertylegacy-5gen-3-6r-supercharger-kit/

 

 

 

 

LWCP

 

PleasureRacing LWCP by Perscitus 05/06/2014

http://legacygt.com/forums/showpost.php?p=4813376&postcount=281

 

 

 

 

SUSPENSION:

Note that there is a suspension thread, but here is a limited list

 

 

Front 26mm Anti-Sway Bar Subaru for pre-2013 by sschmelcke 08/31/2012

http://legacygt.com/forums/showthread.php/2013-3-6r-front-sway-bar-install-2010-192270.html

 

Rear 22mm Anti-Sway Bar Whiteline by Timothy.B 12/07/2016

Part #BSR49XZ

 

Rear 20mm Anti-Sway Bar Subaru by Timothy.B 12/07/2016

http://subaruonlineparts.com/subaru-outback-rear-20mm-sway-p-3969.html

 

 

 

BRAKES: (same as 2.5GT)

KNS Brakes...always willing to help and great prices.

http://www.knsbrakes.com/c/home

STI Brembo Brakes by sschmelcke

http://legacygt.com/forums/showthread.php/brembo-install-pictures-207462.html?t=207462

 

Brake replacement suggestions by Minuccims

http://legacygt.com/forums/showpost.php?p=4702857&postcount=4

 

DBA 4000 F/R rotos paired with Hawk pads

http://www.knsbrakes.com/c/car-items/2870_2013+Subaru+Legacy+3.6R

 

 

 

DRIVETRAIN:

 

IPT 5EAT valve body upgrade by stevenc1703

http://www.importperformancetrans.com/catalog/subaru-complete-performance-transmission/5eat-performance-transmission-4050.html

 

5EAT thread

http://legacygt.com/forums/showthread.php/5eat-ask-your-questions-185412.html

 

 

 

BUILD LIST(alphabetical order)

 

 

Fredrik94087

http://legacygt.com/forums/showthread.php/fredrik94087-2013-3-6r-build-list-220862.html?p=4727045

 

ItalianLegacy

http://legacygt.com/forums/showthread.php/italianlegacy-3-6r-official-thread-227730.html

 

Ncfree

http://legacygt.com/forums/showthread.php/ncfrees-2012-3-6r-limited-build-thread-221925.html?t=221925

 

Nstg8r

http://legacygt.com/forums/showthread.php/nstg8rs-2012-3-6r-limited-mod-journal-219967.html

 

Perscitus

http://legacygt.com/forums/showthread.php/perscitus-2010-3-6r-build-thread-219249.html

 

Stevenc1703's

http://legacygt.com/forums/showthread.php/stevenc1703s-2011-3-6r-build-223519.html

 

 

3.6R PARTS SPREADSHEET:

Mannyapolis

https://docs.google.com/spreadsheet/ccc?key=0AnkQqEEtevuTdDdsRXFucV9FZXdFb1lQc283ZDU5R2c&usp=sharing#gid=0

No longer available. Fortunately, I had the wherewithal to save it a while ago, and it is attached.

 

 

Maintenance

 

SPARK PLUG R&R FOR 3.6R by Timothy.B 10/01/2016

gap .039-.043"

http://legacygt.com/forums/showthread.php/3-6r-spark-plug-replacement-256538.html?p=5496765#post5496765

 

 

1/4 MILE TIMES

fredrik94087

http://legacygt.com/forums/showpost.php?p=5147855&postcount=1574

 

http://legacygt.com/forums/showpost.php?p=5162559&postcount=1656 14.508@96.6

PartNumbers_Manny.csv

1.thumb.jpg.e208fb8157196bab3ce62f926dccfedf.jpg

3.jpg.ffe16b0430b16eec7901ac78877071d4.jpg

4.thumb.jpg.055d002222480d9e5eae2275c31a9efc.jpg

5.jpg.198db836ca6d6a07b9a670603a4d61ab.jpg

Edited by fredrik94087
adding information. I will do this periodically

"It's within spec" - SOA :rolleyes:

"Depth is only shallowness viewed from the side." - Fredism

"So, how much did it cost for your car to be undriveable :lol:." - Stephen (very close friend)

"You have done so much it would be stupid to go back." - Sunny of Guru Electronics

 

2018Q50RS | 2015WrxThread | Shrek

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My pleasure...it's about time as the 5th is getting phased out.

 

Please point me to your own threads or to threads you feel are worth listing.

 

And, please feedback on the format. I just threw it together, but wanted it to be simple and straightforward.

"It's within spec" - SOA :rolleyes:

"Depth is only shallowness viewed from the side." - Fredism

"So, how much did it cost for your car to be undriveable :lol:." - Stephen (very close friend)

"You have done so much it would be stupid to go back." - Sunny of Guru Electronics

 

2018Q50RS | 2015WrxThread | Shrek

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Next, you can be the 1st 3.6R owner to start a mod journal. ;)

 

 

 

OOPS! I didn't see that Perscitus beat you to it, lol

 

LOL...I was just about to say I shall leave that to Perscitus as he started plowing away with mods before I did. I just want a quick reference list.

"It's within spec" - SOA :rolleyes:

"Depth is only shallowness viewed from the side." - Fredism

"So, how much did it cost for your car to be undriveable :lol:." - Stephen (very close friend)

"You have done so much it would be stupid to go back." - Sunny of Guru Electronics

 

2018Q50RS | 2015WrxThread | Shrek

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3.6R brakes are the same as the 2.5GT brakes, fyi.

 

Are we absolutely sure about this? EDIT: I double checked and it is. Not sure why I was not seeing big brake kit for 2013 3.6R, but I see it for 2012. Either way, they probably won't fit with my 17" wheels!

 

Hawk HPS pads are a nice improvement over the OEM pads.

 

Has anyone with a 3.6 modded their brakes, and do we have a link I may post?

 

Can't remember who with a 3.6 upgraded to the STI Brembo brakes.

Edited by fredrik94087

"It's within spec" - SOA :rolleyes:

"Depth is only shallowness viewed from the side." - Fredism

"So, how much did it cost for your car to be undriveable :lol:." - Stephen (very close friend)

"You have done so much it would be stupid to go back." - Sunny of Guru Electronics

 

2018Q50RS | 2015WrxThread | Shrek

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I certainly have interest in brake upgrades, but there are no clear guides on front-to-rear sizing...i.e. 350 mm fronts, does that mean a 305 mm rear rotor for a 52-48 braking distribution....and what is really optimal braking distribution? It is a lot of money to spend without knowing what one is doing. I have read through some of the NASIOC stuff, but even there it says to not make any changes if you do not need to...effectively. However, there might have been some information on NASIOC for braking distribution, it was a while ago when read it.

 

Oh, and since the limiting factor is generally always tire to payment interaction, it makes spending the money harder to justify.

 

I'll keep researching when I get a chance.

Edited by aerophool

Current Mileage as of 19-June-15: 15012

Purchase Date: 30-June-12

Visit my profile page (visitor message section) for a brief mod. list.

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I certainly have interest in brake upgrades, but there are no clear guides on front-to-rear sizing...i.e. 350 mm fronts, does that mean a 305 mm rear rotor for a 52-48 braking distribution....and what is really optimal braking distribution? It is a lot of money to spend without knowing what one is doing. I have read through some of the NASIOC stuff, but even there it says to not make any changes if you do not need to...effectively. However, there might have been some information on NASIOC for braking distribution, it was a while ago when read it.

 

Oh, and since the limiting factor is generally always tire to payment interaction, it makes spending the money harder to justify.

 

Added back in to list.

"It's within spec" - SOA :rolleyes:

"Depth is only shallowness viewed from the side." - Fredism

"So, how much did it cost for your car to be undriveable :lol:." - Stephen (very close friend)

"You have done so much it would be stupid to go back." - Sunny of Guru Electronics

 

2018Q50RS | 2015WrxThread | Shrek

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Stopping distances are the same with the LGT/3.6R OEM and with BBKs, but just for the first two 80-0 stops, maybe halfway through the third. After that OEM fades and but BBK does not. If you only go BBK up front, then there will be a too much weigh shift forward. On OEM suspension, this is not a good thing.

 

Stock distribution is closer to 74% front / 26% rear. There is an old thread either here or NASIOC that goes through the various distributions for older OEM and BBK setups.

 

Small changes seem OK. I've put my LGT fronts on my 07 2.5i Outback. Huge improvement.

 

For the LGT, I just played it safe and went Brembos all around and stiffer springs (now with Bilsteins). The Brembos move a little bias to the rear, it;s not around 72/28 distribution.

 

Real world differences are quite noticeable. The car does not nose dive anywhere near the extent before the BBK (and suspension mods) Even better is the feeling that the rear "squats" down. It's evident weight is prevented from being transferred to the front of the car and hard braking is very controlled and stable.

 

Brembos, suspension, increasing stance with offset wheels, and Stage II mods complement each other to bring balance to this platform. 04+ Fronts are bolt on. 08+ are bolt on with removal or minor mod to the dust shield. Rears <07 now have an adapter bracket.

 

I certainly have interest in brake upgrades, but there are no clear guides on front-to-rear sizing...i.e. 350 mm fronts, does that mean a 305 mm rear rotor for a 52-48 braking distribution....and what is really optimal braking distribution? It is a lot of money to spend without knowing what one is doing. I have read through some of the NASIOC stuff, but even there it says to not make any changes if you do not need to...effectively. However, there might have been some information on NASIOC for braking distribution, it was a while ago when read it.

 

Oh, and since the limiting factor is generally always tire to payment interaction, it makes spending the money harder to justify.

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What size front and rear BBK's did you go with? Tirerack is recommending 355 mm/345 mm or maybe that is all they have tried.

Current Mileage as of 19-June-15: 15012

Purchase Date: 30-June-12

Visit my profile page (visitor message section) for a brief mod. list.

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What size front and rear BBK's did you go with? Tirerack is recommending 355 mm/345 mm or maybe that is all they have tried.

 

Wow, that is freakishly large. Seems like an added cost for rotors and pads.

 

STI Brembo BBKs are 326x30mm fronts and 316x20mm rears. The calipers are lighter than stock as well. They survive winter conditions; some BBK calipers do not. The Brembos do limit wheel and offset choices. Some BBKs are not as thick and thus not as restrictive.

 

Stoptech is an option to STI Brembos. Research their site, maybe call them.

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Tirerack is recommending 355 mm/345 mm or maybe that is all they have tried.

 

TireRack probably isn't the best place to research a BBK :lol:

 

Since the STi Brembos bolt right up (with or without an adapter in the rear) it's pretty safe to say that you can make just about any BBK for the WRX fit.

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TireRack probably isn't the best place to research a BBK :lol:

 

Agreed. However, with 50 sizes, having the options narrowed help. But it doesn't answer bias questions.

 

Since the STi Brembos bolt right up (with or without an adapter in the rear) it's pretty safe to say that you can make just about any BBK for the WRX fit.

 

I guess the point that no one is answering is front to rear balance. It is not about finding something that fits. I know I can get BBK's to fit. This method of randomly pulling STi Brembos and installing them, then hoping that front to rear balance is appropriate is not actually so appropriate. The question is: with a 355 mm front kit, what size rear kit goes on to maintain a 52/48 front to rear bias. Or if we go to 335 front, what rear kit? What is a general appropriate balance? I read somewhere NASIOC, maybe, that stock is 55/45 balance, but it also said that it could be rear biased a little more. So is 52/48 a good number? Yeah, NASIOC says something about center of gravity and forward loading, blah, blah, blah, but those "almost equations" have holes in them, and there are a lot of assumptions that I have not found information for...i.e. stopping power of a 335 mm BBK vs. 355 mm BBK. (Admittedly, I have not had time to fully research it.) Again the limiting factor are the tire to pavement contact.

 

Sorry to hijack the thread.

Edited by aerophool

Current Mileage as of 19-June-15: 15012

Purchase Date: 30-June-12

Visit my profile page (visitor message section) for a brief mod. list.

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I will go out on a limb and say that in addition to figuring the F/R weight bias, the braking balance needs will change with your stance (rake) and your suspension (stiffness/dampening/travel).

 

On a comletely OEM suspension with weight getting tossed around, you would want more braking power up front.

 

If you have modified your suspension and you don't end up with all the weight in the front when you brake, then you need a little more in the rear.

 

The ideal braking split is related to your car's weight balance as well as dive/squat during braking. So, what may be perfect for me, would not be perfect for you.

 

By the way, the thread will never get hijacked because I will keep updating the first post with any useful link that comes up as a result of discussion.

 

Cheers!

"It's within spec" - SOA :rolleyes:

"Depth is only shallowness viewed from the side." - Fredism

"So, how much did it cost for your car to be undriveable :lol:." - Stephen (very close friend)

"You have done so much it would be stupid to go back." - Sunny of Guru Electronics

 

2018Q50RS | 2015WrxThread | Shrek

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Agreed. However, with 50 sizes, having the options narrowed help. But it doesn't answer bias questions.

 

 

 

I guess the point that no one is answering is front to rear balance. It is not about finding something that fits. I know I can get BBK's to fit. This method of randomly pulling STi Brembos and installing them, then hoping that front to rear balance is appropriate is not actually so appropriate. The question is: with a 355 mm front kit, what size rear kit goes on to maintain a 52/48 front to rear bias. Or if we go to 335 front, what rear kit? What is a general appropriate balance? I read somewhere NASIOC, maybe, that stock is 55/45 balance, but it also said that it could be rear biased a little more. So is 52/48 a good number? Yeah, NASIOC says something about center of gravity and forward loading, blah, blah, blah, but those "almost equations" have holes in them, and there are a lot of assumptions that I have not found information for...i.e. stopping power of a 335 mm BBK vs. 355 mm BBK. (Admittedly, I have not had time to fully research it.) Again the limiting factor are the tire to pavement contact.

 

Sorry to hijack the thread.

And that's waaaay more research and knowledge than your average BBK shopper already :lol: Sadly, most just want something that looks cool to fill up the extra space because they just had to get 19-20" wheels... :rolleyes:

 

But back to your research, does the number/size of the pistons in the caliper come into the equation at all? Or is it all pretty much determined by the size of the rotor? As far as rotor size is concerned, the Brembos aren't much bigger than our stock GT setup (which is why I really have a hard time calling Brembos a "BBK") So they really don't have much more stopping power, but they can handle repeated applications and heat much better in a track environment.

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Agreed. However, with 50 sizes, having the options narrowed help. But it doesn't answer bias questions.

 

 

 

I guess the point that no one is answering is front to rear balance. It is not about finding something that fits. I know I can get BBK's to fit. This method of randomly pulling STi Brembos and installing them, then hoping that front to rear balance is appropriate is not actually so appropriate. The question is: with a 355 mm front kit, what size rear kit goes on to maintain a 52/48 front to rear bias. Or if we go to 335 front, what rear kit? What is a general appropriate balance? I read somewhere NASIOC, maybe, that stock is 55/45 balance, but it also said that it could be rear biased a little more. So is 52/48 a good number? Yeah, NASIOC says something about center of gravity and forward loading, blah, blah, blah, but those "almost equations" have holes in them, and there are a lot of assumptions that I have not found information for...i.e. stopping power of a 335 mm BBK vs. 355 mm BBK. (Admittedly, I have not had time to fully research it.) Again the limiting factor are the tire to pavement contact.

 

Sorry to hijack the thread.

 

The bias is to the front based on weight distribution of the car. 52/48 may be OK for a Porsche or BRZ but not our cars. Why have 48% of the braking power for 20-25% of the weight?

 

Indicated before the OEM bias is closer to 74/26 (edit: 78/22). I tend to not disagree, but the STI Brembos are not random but rather a conservative change of a few % (edit 73/27). This is due to the simple fact that STI and LGT/3.6R have a very similar weight balance.

 

I'm 100% sure the Brembos are a substantial improvement over OEM that keeps the weight distribution close to OEM.

 

This is not a mod to take lightly and must be planned. It's a sizable $$ commitment that you want to be sure of. Bigger rotors are not necessarily better. More pistons are not necessarily better. A sized rotor to the clamping ability of the caliper is important. Being aware how the ABS will react is important. Too much initial grip and the ABS will sense the tires are locked up and the ABS will kick in early. Perhaps what will happen to the rears in the 52/48% distribution or if too aggressive pads are used. Tire grip is what will stress the brake system

 

http://legacygt.com/forums/showthread.php/bbk-brake-bias-list-30088p14.html

 

http://www.stoptech.com/technical-support/technical-white-papers

 

http://www.rs25.com/forums/f9/t56761-brake-bias-worksheet.html

 

http://www.tceperformanceproducts.com/bias-calculator/

Edited by minuccims
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Seems a cheap(er) and possible solution to combat the brake fade is just to get a new set of pads. A better set of pads. It will not change your front/rear distribution unless you taylor the pad set, but it should help brake fade, correct? (provided you buy a good set).

Current Mileage as of 19-June-15: 15012

Purchase Date: 30-June-12

Visit my profile page (visitor message section) for a brief mod. list.

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Seems a cheap(er) and possible solution to combat the brake fade is just to get a new set of pads. A better set of pads. It will not change your front/rear distribution unless you taylor the pad set, but it should help brake fade, correct? (provided you buy a good set).

 

Better pads will have a higher friction coefficient, and they stand up to higher rotor temps. This is a good first start but more rotor surface area/density is needed to really handle fade. For limited spirited driving, it may be enough for a 3.6R/LGT. The rotors and brake pads are so small on the 2.5i, it may be better but still fade.

 

Back in 2010 after getting the LGT brakes to easily fade while just having fun in the twisties, my mod research took me right to the Brembos. A simple bolt-on improvement with little risk of adversely messing up distribution but bettering it. I skipped the intermediate step with keeping stock rotors/better pads.

 

The Brembo calipers (as othe BKKs) weigh less as do the rotors, so unsprung weight is reduced.

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Do it. Replace the OEM with better pads and drive the pants off it. Your not going to feel much difference with new rotors unless maybe they're vented and cross drilled. Not a huge difference unless you're on a track day. OEM rotors are ok.

 

Seems a cheap(er) and possible solution to combat the brake fade is just to get a new set of pads. A better set of pads. It will not change your front/rear distribution unless you taylor the pad set, but it should help brake fade, correct? (provided you buy a good set).
Edited by nadracer
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