Modern Automotive Performance
Modern Automotive Performance

2015+ Subaru WRX/STI MAPerformance Cobb Accessport FAQ

Posted on 24 January 2017

Cobb Accessport and MAPerformance FAQ

Does the MAP Stage 1 OTS tune come free with the Accessport? 

Yes, it’s free with the purchase of an Accessport through MAPerformance, and is emailed to you once you receive it in the mail.

What’s the difference between the Cobb OTS tunes and MAP tunes?

The MAP OTS Stage 1 tune is not a modified Cobb tune. They are developed from scratch here in house by our contracted tuner. We spent a lot of time with boost control, as well as valve timing to promote spool, and improved top end power.

What kind of power can I expect with the MAP tune?

You can expect 30-40 whp gains with our OTS Stage 1 tune.

What mods can I run with the MAP Stage 1 tune?

The MAP Stage 1 tune is meant for stock vehicles only. With the exception of a cat back exhaust which does not affect the tune.

Can I run an intake with your Stage 1 tune?

There are three intake systems that are safe to run with our Stage 1 tune. Those being the ETS, Mishimoto, and PERRIN intake systems.

How to I transfer the MAP tune onto my Accessport?

Do I need to send logs into you after I flash the vehicle?

This is not necessary as our tunes are more of an Off The Shelf tune, and does not typically require further tuning. If you do experience any drivability issues, or CEL’s, please contact Ian at

How long will it take to review my log?

This depends on the demand.  We typically respond to messages within 24 hours, but log reviews and revisions can take a substantial amount of time.  Please be patient with the process.

What parameter should I be looking at after flashing? And what should the readings be?

There are 4 major ones that should be watched:

  1. Boost- Target boost is set for 20 psi. Boost should not spike more than 23 psi. Also keep in mind, that ambient air temps can cause different peak boost levels. Peak boost will typically be much lower in cooler temps.
  2. DAM (Dynamic Advanced Multiplier)- This should always read 1.00. If that number drops, it could be an indication of poor fuel.
  3. FBK (Feedback Knock)- This should always read 0.00 during wide open throttle pulls. Cobb states that it is normal on the FA20DIT engines to register -1.41 to -5.00 during part throttle, low RPM cruising.
  4. FKL (Fine Knock Learn)- Same as above.

Will the Accessport void my warranty?

Yes. Subaru can find out if the ECU has been tampered with, and can deny any factory warranty. This obviously depends on your relationship with the dealership.

How do I send a data log? And what parameters should I send?

Datalog a pull in 3rd gear from 2,000rpms to the rev limiter. Another from 2nd gear at 2,000rpms all the way through 3rd gear at redline.

Log the following:

  • A/F Sensor #1 Ratio
  • Calculated Load
  • Commanded Fuel Final
  • Dynamic Advance Multiplier
  • Engine Speed
  • Feedback Knock Correction
  • Fine Knock Learning
  • Ignition Timing
  • Intake Temperature Manifold
  • Requested Torque
  • Throttle Position
  • Wastegate Duty
  • Manifold Rel. Pressure (Boost)

Hit the datalog button about 5-10 seconds before you go WOT, then slow down to a safe speed and stop the log.

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  • Daneil: September 01, 2017

    I saw someone in the comments say they were using the mishimoto intake with stage 2. Is this safe to run?

  • MAPerformance: May 01, 2017

    Ryan, the OTS map is emailed to you shortly after purchase. I can have Ian reach out to you.

  • Ryan Scarpa: May 01, 2017

    After purchasing a ots map from you, how long will it take to receive the file from you?

  • Ryan Scarpa: May 01, 2017

    After purchasing a ots map from you, how long will it take to receive the file from you?

  • MAPerformance: January 30, 2017

    Justin, Yes our Stage 2 tune is unique strictly to our intake. Please let me know if you have any further questions!

  • Justin Lucas: January 24, 2017

    With the Stage 2 MAP tune, can I run a ETS intake? I saw it said MAP intake only but I just wanted to make sure it’s that strict.

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