2017 Subaru Forester XT Support

josh fernandez-12

The COBB Accessport now supports the 2017 Subaru Forester XT!  A simple firmware update to the already available SUB-004 Accessport will add compatibility for Subaru’s current model year SUV.  CLICK HERE for a firmware update how-to.  Similar to previous model year support, Off The Shelf Maps are limited to Stage 1 for either 91 or 93 octane fuel.  Additional information regarding Off The Shelf maps can be found on the Map Notes Page.


Power Gains

Even with no mechanical changes, the Forester XT responds very well to tuning with the Stage 1 OTS Maps!  Large gains are seen across the entire power band and driveability is greatly improved.

dyno-subaru-fxt-2014-2015


Custom Tuning

Customers with modifications beyond Stage 1 can have their cars custom tuned by a certified COBB Protuner using Accesstuner Pro.  Utilize our Dealer Locator to find a COBB Protuner near you!

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Users intersted in custom tuning their own vehicle can utilize our end-user Accesstuner software as well!  To acquire Subaru Accesstuner, follow the link on the product page to compete training through EFI University.

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COMMENTS
PETER BERTUGLIA on April 25, 2017 says:

I am doing some research on aftermarket intercooler’s and am leaning towards the AVO TOP MOUNT INTERCOOLER, direct fit, less restriction etc.. My question, what affect will this installation have with the AP’s stage 1 tune with no other aftermarket parts installed.

Reply
    Marshall
    Marshall on April 25, 2017 says:

    Hey Peter, with the upgraded intercooler you should definitely notice decreased charge air temperatures which could lead to less knock and potentially a bit of a bump in power. The Stage 1 OTS map will not take full advantage of the cooler charge air temperatures however there wouldn’t be any adverse affects.

    Marshall@COBB

    Reply
Ben Compton on August 18, 2017 says:

How badly is this tune thought to cook the CVT? I am hesitant to tune because of it. Also, does the tune address the CVT shifting in any fashion? Is it possible to get a halfway respectable launch in my car without breaking things?

Reply
    Marshall
    Marshall on August 21, 2017 says:

    Hey Ben, our experience has indicated that CVT reliability is not significantly impacted at the Stage 1 power level. Beyond the Stage 1 power level we have definitely seen an increase in chances of failure.

    Marshall@COBB

    Reply
Aaron McLean on December 8, 2017 says:

Hi Marshall, what are the actual expected power gains for the Stage 1 tune at 93 octane? Also, not sure if you answered Ben’s question above regarding trouble with the CVT shifting. Are there any concerns with the CVT shifting improperly?

Reply
    Marshall
    Marshall on December 8, 2017 says:

    Hey Aaron, you can always find actual power numbers on our Dyno Database. We tend to advertise in percentage gains as actual dyno numbers will vary slightly from dyno to dyno. (More on that HERE).

    Here is the dyno chart from our 2015 FXT, the 2017 FXT uses the same hardware and calibration data so the gains should be nearly identical.
    2015 FXT Dyno Graph

    At the Stage 1 power level there is no additional concern around the functionality of the CVT. We have definitely seen issues with slipping/shuddering when increasing power beyond the Stage 1 level.

    Marshall@COBB

    Reply
      Aaron McLean on December 12, 2017 says:

      Helpful, thanks Marshall!!

      Reply
      Aaron McLean on December 12, 2017 says:

      So it looks like a HP increase at Stage 1 of about 3.75%. Is that what you see? Stock 2017 XT rated at 250HP, so I should expect a Stage 1 increase to about 259HP. Is that fair to say?

      Reply
John mangsep on April 2, 2021 says:

what tune do i install for my 2017 forester xt with nvidia exhaust and cobb big sf ots intake?

Reply
    Adam Hill
    Adam Hill on April 5, 2021 says:

    Hi John,

    I need some clarification. We do not make an intake for the 2017 FXT. For that year model we only have the Stage1 maps for a stock intake. Any additional mods will require custom tuning via an approved Protuner with the Accessport.
    Adam@COBB

    Reply
Matthew Casias on April 8, 2021 says:

Hello Marshall, this is going to be my set up here shortly. 2017 subaru forester xt cvt. Do you feel this may push the limits of the cvt power threshold after a tune?

Hayden transmission cooler
Crawford air oil separator
1320 j pipe/downpipe
AEM intake
Cobb accessport
Nameless charge pipe
17 WRX catback

Thank you.

Reply
    Marshall
    Marshall on April 15, 2021 says:

    Hey Matthew,

    It really comes down to the tuning style. At this point, I think most of our Protuners are familiar enough with the CVT vehicles and are able to manage torque appropriately. While the engine will certainly be able to produce more torque than the CVT can handle, it can be dialed back.

    Marshall@COBB

    Reply