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COBB Accessport for SJ FXT - Tuning Results Thread

('14-'18)
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232K views 1.4K replies 79 participants last post by  SpudRacer  
#1 · (Edited)
This thread has been split off from the following thread: Accessport Support for 2014+ Forester XT Now Available! - GeoJosh


Alright, boys. I flashed my ECU tonight and was messing around a bit. Don't think I am launching correctly as the instructions are a little confusing...


I lucked out at a couple empty red lights on my home tonight and did two 0-60 runs, first with launch (which I am sure I did wrong) and second one with just flooring it off the line.

Here are the results.

"Launch":
Image




No launch:
Image
 
#3 ·
93 octane on the 93 map. I'm watching the knock and everything looks good thus far! I only hit it hard a couple times after everything looked good under normal load.

As for launching, is the order brake->gas->hold cancel? Or is it hold cancel->brake->gas? Also do you continue to hold cancel after letting off the brake? Any ideas?
 
#4 ·
Based on the map notes it seems like, hold.cancel button. Mash brake, mash gas, and then let go brake and le go cancel at same time as brake pedal. Just don't hold it/build for too long/over and over.
 
#7 ·
Hey guys, the Launch Mode settings in the OTS maps will be more aggressive than stock however there will still be a lot of room for more aggressive settings.

Essentially, when the Cruise Control function is OFF, the Cancel button acts as a trigger to increase the torque limit under 20 MPH. I don't have a TON of experience with the feature, but the method that seems to be preferred is: Brake to floor -> press and hold Cancel button -> Accelerator to floor. You will need to hold this for probably 2-3 seconds to allow boost to build a bit and then release the brake when you're ready to launch. Once you've exceeded 20 MPH, release the Cancel button. I definitely do not recommend holding the brake and gas simultaneously for more than 6-8 seconds as trans temps will begin to climb.

Hope that helps a bit with Launch Mode! Let me know if you have any other questions/concerns.

Marshall@COBB
 
T
#9 ·
I'm wondering about the S# and S buttons on the steering wheel. I think they alter both transmission shift characteristics and engine tuning parameters.
1. After re-mapping the ECU to this new AccessPort Forester map, are the S# and S buttons on the steering wheel disabled? If not, what do they do?
2. Are the dyno comparison graphs comparing I-mode (non-S#) to new map?
3. What is the dyno comparison/HP gains between S# and the new map?

TIA, Tom
 
#12 ·
tomkweb said:
I'm wondering about the S# and S buttons on the steering wheel. I think they alter both transmission shift characteristics and engine tuning parameters.
1. After re-mapping the ECU to this new AccessPort Forester map, are the S# and S buttons on the steering wheel disabled? If not, what do they do?
2. Are the dyno comparison graphs comparing I-mode (non-S#) to new map?
3. What is the dyno comparison/HP gains between S# and the new map?

TIA, Tom
Click to expand...
i dont know about what mode the baseline runs were done in....but iirc (and on previous stis with SI-drive) the buttons only effect the throttle input/values....not really working from or changing to a different "map". may be reflected if someone with an XT logs both throttle pos% and accel pos%...and changes modes...well see a difference between the two??

but ive always been under the impression that the modes will still work as is. other more significant changes per mode may be possible when it comes to a protune and/or using accesstuner race, but ive never owned a subie with SI drive so have no experience.

and like @lcrazyaznl mentioned theres some info on what has changed in the map notes on their site.

"Revision Notes: v100 –
 Revised ignition timing, primary fueling, camshaft timing, closed / open loop transition thresholds and boost
levels for performance and safety.
 Factory fueling and timing strategies streamlined for ease-of-calibration and consistency following a key-off
and restart sequence.
 Revised throttle mapping in Sport and Sport # to allow for a more linear throttle.
 Set speed limiters to maximum allowed value
 Per-Gear Timing Compensations revised for safety and enabled for 6th - 8th gear in S# Mode (OEM logic
only allows for compensating gears 1-5)."
 
#15 ·
cool how you can see now how heat builds/is managed with the different IAT sensors, like int he MAF and then in the Manifold vs ambient air. someone should go crazy on their SJ with heat tape/other heat fighting elements and see how that data changes!!! would def help performance as well with all the stop and go driving most of us do, lol!
 
#45 ·
Ohhhhhh she goes now!!! Thank you for sharing and keep enjoying your "new" ride. I am picking up my AP tomorrow and will have to read how to use the thing, let alone all this datalogging. I can see how useful it is and once you know how to read the info, it tells you what your car is doing at what RPM's. To me, S# is just slow compared to S mode.
 
J
#44 ·
I wanted to post my first data log here to possibly get some feedback from people who know more than I do... My XT has the OTS 93 tune (full tank of Sunoco 93) and an Invidia Q300 catback. I'm new to the AP and data logs in general but after reading a few recommended links that have been posted throughout the forum, I feel like the data log looks good... Thoughts?

I did experience what I believe was a fairly "big" false knock today while in a short period of stop and go traffic. I wasn't paying attention to the AP gauges while in traffic but when I did glance down, I saw that it recorded an instance of fairly high feedback knock. I'm assuming it was a false knock as I never got above 1,500 RPMs and was at less than 15% throttle while it would have been recorded.

Thanks for looking!
Steve
 

Attachments

#51 ·
Thanks for the vid @Fl Fozzy! And everyone else for the education. I am not sure that I buy the 0-60 times, but I am totally sold on improved driveability. Time to start saving the pennies...
 
#52 ·
Emanon said:
I am not sure that I buy the 0-60 times...
Click to expand...
times/power stuff on things like this always make me hesitant. but with that said the AP should be pretty close since its going off the ecu, which has the "time" as well as the vehicle speed, its gotta be somewhat accurate (assuming your tire/wheel size still matches oem rolling diameter). i mean you could always log from a standing start and compare the timing column to the vehicle speed column. oh, and when someone does that use LC and log throttle pos%...im still dying to see how much psi you can built before letting off the brake!!!

its the performance/dyno one that is "meh?", esp with an auto. apparently i can make 700+whp/1000+wtq on my setup, lol. done under the correct circumstances it would be closer of course.
 
#55 · (Edited)
datazap.me | aRandomizer | Subaru Forester 2014 XT

This log I took in I mode. Boost is really high.^

datazap.me | aRandomizer | Subaru Forester 2014 XT

This log is in S mode. Boost is really high.^

Does this relate to the thread about the turbo clamps fix? http://www.subaruforester.org/vbulletin/f207/danoz-fix-fa20dit-turbo-clamps-318129/

Trying to get some input on if to much air is getting in the turbo or what. Thanks for help in advance.
Seems to only boost that much if I floor it. If I ease on the accelerator it seems to be more stable.

@FXTerrific and anyone else. Weather, is chilly right now. In the 30's. My elevation that the car usually runs at ranges anywhere from 1500ft-3000ft. Yeah, May be better off reaching out to cob or if they want to PM me on the forum about it too. I know there's a cobb tuner about a hour away from me but not sure I want to go that route yet and pay more.
 
#57 · (Edited)
aRandomizer said:
datazap.me | aRandomizer | Subaru Forester 2014 XT

This log I took in I mode. Boost is really high.^

datazap.me | aRandomizer | Subaru Forester 2014 XT

This log is in S mode. Boost is really high.^

Seems to only boost that much if I floor it. If I ease on the accelerator it seems to be more stable.
Click to expand...
colder more dense air will cause jumps in psi as far as the value at least. my personal setup was a little detuned by my tuner for winter as with my initial setup was fun, but getting a little close to the edge as my fueling couldnt keep up! sigh.

elevation change/around urs shouldnt matter that much. i ment more say you lived at sea level and then compared it to someones log that lived in denver or somewhere with a big jump in elevation. there would be differences seen in logs if both cars were on the same tune.

FWIW two other logs in this thread show similar boost above the target...getting into the -2/-2.5 range. so may be normal. but did either of these guys replace those clamps??

datazap.me | fl_fozzy | On ramp WOT

http://www.subaruforester.org/vbulletin/4374858-post45.html
 
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