2013 XSport Tuning

[MiWiAu]

Anybody know how to reset OAR? I changed over from 87 to 91, and I can't get the OAR to reset to zero. I tried a KAM reset, reflashing my custom tune, flashing to stock (and back to custom tune), and none of these result in my OAR changing.

Is my only option to just drive it? If so, how long until OAR renormalizes to the new fuel? Thanks!


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[FoMoCoSHO]

What is OAR at now?

Quality 91 should show -1

 

[MiWiAu]

What is OAR at now?

Quality 91 should show -1

I was at -0.33 with 87. After about 20 miles of driving with premium, it's down to -0.76, but it continues to move toward -1 and doesn't seem to have settled yet. I'm currently using a blend of 87 and 93 to achieve 91 octane target. 91 is scarce where I live, but I want to be covered when I travel.

I found a tip on the ST forum that suggested a light load uphill around 4lb boost to relearn faster. I'll try that on my way to work today.


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[ecoboostsho]

What is OAR at now?

Quality 91 should show -1

I was at -0.33 with 87. After about 20 miles of driving with premium, it's down to -0.76, but it continues to move toward -1 and doesn't seem to have settled yet. I'm currently using a blend of 87 and 93 to achieve 91 octane target. 91 is scarce where I live, but I want to be covered when I travel.

I found a tip on the ST forum that suggested a light load uphill around 4lb boost to relearn faster. I'll try that on my way to work today.


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Well YMMV but on my car if I can get 4 degrees of KR advance for a couple of seconds with light throttle it will typically pop right up (or down I guess) to a more negative value.  So yes a couple of light pulls with a little bit of boost and timing advance without it generating any knock should get you what you need.

 

[16MagSport]

FYI, mine has always measured -0.96 with 91 octane.  When I added 96 and 100 at the track to get me a 93-95 octane mix, it still measured -0.96 so I think that is maxed for mine.

 

[derfdog15]

FYI, mine has always measured -0.96 with 91 octane.  When I added 96 and 100 at the track to get me a 93-95 octane mix, it still measured -0.96 so I think that is maxed for mine.

My SCT Pegs/maxes out at -.96 as well. I think it is possible to play with the limits of the value within a tune for finer readings/readings past -1 though if so desired.

 

[MiWiAu]

Thanks guys. Last time I ran a tank of premium (91 no ethanol from a station way out of town), I was at -0.98 to -0.96. When I switched back to 87 to start my new tunes with AJP, the OAR dropped pretty quickly (within 20 miles) and settled at -0.33 through 2 tanks of fuel. It just seems to be taking a lot longer to adjust this time.

On a side note, I was under the impression that OAR was stored in KAM and that clearing it should reset OAR to a default value. This is not the case with my X4, since my OAR does not change after a KAM reset. I sent a note to SCT yesterday asking if the X4 should be capable of resetting this value, and they replied saying I needed to set up a remote support session to look into my issue (no definitive answer given). I won't be able to call during their support hours until tomorrow morning, but I'll let you know what they say.


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[derfdog15]

Thanks guys. Last time I ran a tank of premium (91 no ethanol from a station way out of town), I was at -0.98 to -0.96. When I switched back to 87 to start my new tunes with AJP, the OAR dropped pretty quickly (within 20 miles) and settled at -0.33 through 2 tanks of fuel. It just seems to be taking a lot longer to adjust this time.

On a side note, I was under the impression that OAR was stored in KAM and that clearing it should reset OAR to a default value. This is not the case with my X4, since my OAR does not change after a KAM reset. I sent a note to SCT yesterday asking if the X4 should be capable of resetting this value, and they replied saying I needed to set up a remote support session to look into my issue (no definitive answer given). I won't be able to call during their support hours until tomorrow morning, but I'll let you know what they say.


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OAR should be a KAM item, however this was noted a few days ago in a SHO related post as well (can't remember the topic or I would point you to it).

The speculation was that the change to PCM/ECU between the '12 and older SHO vs. the '13+ SHO may be the reason, as on the older SHO the KAM reset (and even just general tune flashes) reset OAR. On the 13+ many people (myself included) noted that it did not change, with a reflash or a KAM reset.

It would be awesome if SCT found a way to do it on the 13+ SHO.

I assume the XSport shares similar changes/behaviors

 

[FoMoCoSHO]

FYI, mine has always measured -0.96 with 91 octane.  When I added 96 and 100 at the track to get me a 93-95 octane mix, it still measured -0.96 so I think that is maxed for mine.

My SCT Pegs/maxes out at -.96 as well. I think it is possible to play with the limits of the value within a tune for finer readings/readings past -1 though if so desired.

That is correct, mine scales to -1.15

 

[MiWiAu]

On my drive home today, I focused on light throttle/boost trying to allow the KR climb as far into the negative region as possible for as long as possible. KR maxed out several times at -3.99 (adding spark). After about 10 miles, OAR went from -0.76 to -0.79, then about about a half mile later it jumped to -0.96.

I'll still follow-up with SCT in the morning to see if they can offer any response to the OAR not clearing with KAM reset, but at least I think I can expedite the OAR relearn in the future, if they cannot provide a solution.

Thanks (again) for the help!

 

[SHOdded]

Glad it worked out :thumb: