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Discussion Starter #1
I have a 2014 outback special edition package. Eyesight, CVT and 2.5i boxster engine. I would like to add both horsepower and torque. The car is my daily driver and I plan on doing some off road adventuring and may even try ralley racing.

I want to consider adding a blower and wonder in a supercharger is an option. As well as turbocharger.

Any advice would be appreciated!
 

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03 H6 OBW & 06 WRX Sportwagon
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17,329 Posts
I hope you have plenty of money available for this project.

user @cardoc has experience with supercharging. I think he started with a Raptor kit?

 

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On the Super Mod Squad
2002 Pair: 3.0 VDC Wag & 2.5 Limited Sedan
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25,802 Posts
@Rub .... @Brucey ... @AWDFTW

any advice ?

I like soup cans and duct tape for putting the beans to a FB25B w/CVT. = efficient on time,...money, with big power gains.

maybe consuming a can of baked beans would help too.
 

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5,218 Posts
You can go the way of the Road Kill guys and toss a couple of leaf blowers in the back......
479602


....or face the reality you bought the wrong car.
 

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Premium Member
2001 VDC/SC One of a Kind
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12,879 Posts
You got me thinking.

If it was a manual, it would be good and easy. The AVLS timing can be adjusted to help it breath better along with the fuel and ignition mapping. With a CVT, iffy. Although, the CVT is behind a 3.6R, so a small boost in power from the 2.5 in front of it is not totally out of the question. Your power gains would only be that of an average 3.6R N/A, but for a lot more money.

Check with Ed at Xtreme Racing Tuning and see if anyone else has approached him for Tuning a FB25 with a CVT. It may be close to tuning a FB20, except you have the CVT. Subaru did use a CVT for the WRX, but the shift map is different and it was programmed for 6 speed paddle shifting with gear hold.

If you go with it, you'll need 450cc or larger injectors, a higher volume fuel pump, a new MAP with MAP rescaling in the ROM if you go higher than 5 psi boost, suggest an intercooler (WTA works great), beef up the suspension a little, think WRX parts. Other things would be fitment. You'll be shifting parts around. Maybe a BRZ supercharger would fit. :unsure: Sprintex Intercooled 210 Supercharger Kit FRS/BRZ/86

With a turbo you would be replacing a lot more. Pretty much putting a WRX engine support and exhaust on a FB25 along with the above.

Lots to think on. Lots to budget. Lots of time involved, especially tuning it.
 

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2010 Outback 3.6R 2014 Legacy 2.5i 2003 Legacy L special edition (retired to backup)
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690 Posts
CVT will not handle much additional power and once that chain slips, game over
 

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Premium Member
2001 VDC/SC One of a Kind
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12,879 Posts
@YeuEmMaiMai

Per Subaru
TR690
  • 2010-2012 Legacy/Outback 2.5L NA
  • 2015-2019 Legacy/Outback 3.6L NA
  • 2014-2020 Forester 2.0L Turbo
  • 2015-2020 WRX 2.0L Turbo
  • 2019-2020 Ascent
  • 2020 Legacy/Outback 2.4L Turbo
So, it seems that the CVT will handle the extra HP.

Although the OP has a TR580, it may be possible to add the power and the CVT function normally. Aside form valve body issues, the internal parts of the CVT have been proven to be robust so far.
 

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I simply cannot abide useless people.
2006 2.5i and 2002 3.0 wagons.
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12,275 Posts
This is not a project for a daily driver.
 

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2019, Subaru Outback Limited 3.6R
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715 Posts
Sell it, buy 3.6. Problems solved and I just saved you money, time and aggregation.
 

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Registered
2010 Outback 3.6R 2014 Legacy 2.5i 2003 Legacy L special edition (retired to backup)
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690 Posts
@YeuEmMaiMai

Per Subaru
TR690
  • 2010-2012 Legacy/Outback 2.5L NA
  • 2015-2019 Legacy/Outback 3.6L NA
  • 2014-2020 Forester 2.0L Turbo
  • 2015-2020 WRX 2.0L Turbo
  • 2019-2020 Ascent
  • 2020 Legacy/Outback 2.4L Turbo
So, it seems that the CVT will handle the extra HP.

Although the OP has a TR580, it may be possible to add the power and the CVT function normally. Aside form valve body issues, the internal parts of the CVT have been proven to be robust so far.

dunno where you got your information from but it is wrong the turbo and the 3.6L use the high torque variant. you put that extra power through the standard CVT and it will go poof in short order...also the 2014 2.5L uses 2nd gen CVT of which there is no high toque variant.

 

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Premium Member
2001 VDC/SC One of a Kind
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12,879 Posts
@YeuEmMaiMai It's all good. The 690 is used with the high HP and Torque output engines and has worked. If you look at my post I stated that the 580 is iffy. I also posted that the CVT used with the WRX and 3.6 are programmed differently

I will tell you that the 4EAT does NOT like the added HP my engine puts out. :devilish:
 

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Brucey
'17 3.6 Limited
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10,504 Posts
I found a Supercharged Crosstrek.

Would be most similar to a 2.5 Outback.


Lots of work but seems doable if you're set on doing it.

The TR580 transmission seems to be holding up but a 25 percent increase in power from nothing is still nothing.

I would set aside a lot of time and money before hand if you go through with it.

It will also be slower, more expensive, and less reliable than a 3.6 Outback.
 

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2015 Outback 2.5i Limited, Ice Silver/Black
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1,809 Posts
Great video. Not much friction surface there...

479731
 
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