Learning how to operate COBB AP

[Mike193]

I own a 2011 WRX STi, and got an accessport and stage 1 the other day. I've been using it as a boost gauge, but would also like to live monitor a few other things, what are some good things to monitor? Like maybe trans temp, or exhaust temp etc.

[jimbo058]

Air/Fuel Ratio, Intake Temperature, and Wastegate Duty Cycle are other interesting features to monitor. A/F ratio is one of the most important items to keep under control to avoid catastrophic engine damage from occurring. I have also used the AP as a shift light at the drag races !!!

[zax]

Air/Fuel Ratio....A/F ratio is one of the most important items to keep under control

Useless if you don't have a WideBand O2 sensor.


Things you really want to monitor:
DAM
RPM
Calculated Load
FBKC
FLKC
Boost

I'm not familiar with the newer CANbus ECU (2008+ WRX/STi), but with the older ECUs, the more parameters you log, the lower the resolution of your logs. Therefore, it's always best to reduce the number of parameters you log to the bare essentials.

[EJ257]

Things you really want to monitor:
DAM
RPM
Calculated Load
FBKC
FLKC
Boost

I'm not familiar with the newer CANbus ECU (2008+ WRX/STi), but with the older ECUs, the more parameters you log, the lower the resolution of your logs. Therefore, it's always best to reduce the number of parameters you log to the bare essentials.

What you log is dependant on what information you're interested in. If you're interested in boost, the parameters will be different than if you're interested in CL fueling, etc.

For all-purpose log, what Zach mentioned plus:
Throttle position
Boost error
Ignition timing

As for the resolution comment, the same is true. You have XX bandwidth; the more parameters trying to go through, the less resolution you have on each.

[Mike193]

I want to make sure tune is running correctly and engine isnt being harmed. Please dont use any abbreviations, im bad enough at this as is. TY.

[zax]

I want to make sure tune is running correctly and engine isnt being harmed. Please dont use any abbreviations, im bad enough at this as is. TY.

Without a Wideband O2 sensor, that's going to be tough. This is more reactive than proactive, but it works... logging FBKC and FLKC (especially FBKC) with calculated load, TPS, and boost will tell you if you are knocking at high-boost and load. That is the most common failure point from tuning.

[Mike193]

Without a Wideband O2 sensor, that's going to be tough. This is more reactive than proactive, but it works... logging FBKC and FLKC (especially FBKC) with calculated load, TPS, and boost will tell you if you are knocking at high-boost and load. That is the most common failure point from tuning.

Uhh, no offence, but WTF is FBKC, FLKC, TPS. Idont see those under the data logging section, and there are like a hundred things lol

[zax]

Uhh, no offence, but WTF is FBKC, FLKC, TPS. Idont see those under the data logging section, and there are like a hundred things lol

WTF = What the ****
FBKC = Feedback Knock Correction
FLKC = Fine Learn Knock Correction
TPS = Throttle Position Sensor

[Mike193]

Thank you sir, although I was informed on WTF years ago hahaa, just new to the AP and so far, I'm getting very discouraged and considering just selling it.

[WRidesX]

Thank you sir, although I was informed on WTF years ago hahaa, just new to the AP and so far, I'm getting very discouraged and considering just selling it.

This has all been very helpful to hear considering I'm debating still between the two tuning options. I do like the idea of using the AP as a gauge and a way to monitor (mainly my A/F ratios.

[zax]

This has all been very helpful to hear considering I'm debating still between the two tuning options. I do like the idea of using the AP as a gauge and a way to monitor (mainly my A/F ratios.

Guys. If you don't have a Wideband O2 sensor (which the AP cannot read), there is no point in monitoring AFRs since the AFRs that are reported by the narrow-band O2 sensor are only useful when averaged over a long period of time and only when rich.

[Mike193]

I'm pushing 18.5 at full boost. Alot of friends are claiming this is overboard, is that just because they don't know much about these cars? I'm only on a cobb stage 1 tune... I dont wanna ruin anything running too much boost

[zax]

I'm pushing 18.5 at full boost. Alot of friends are claiming this is overboard, is that just because they don't know much about these cars? I'm only on a cobb stage 1 tune... I dont wanna ruin anything running too much boost

Sounds like your friends need to learn how to read. From the 2011 STi Cobb Stage 1 map notes:

Stage1 93 v301 Boost Select - Intended for 2008-2011 Subaru Impreza WRX STi vehicles with stock intake
system, and a stock exhaust running 93 or 94 octane petrol. Boost Targets: ~18psi (S#) or 15.5psi (S) peak boost
pressure tapering down to ~13psi by the 7000 RPM redline, +/- 1.0psi.

https://static.cobbtuning.com/cobbtu...20-%20v301.pdf

[Mike193]

Looks like I need to learn how to read. thank you sir.

[Mike193]

So tonight i played around with the AP and it really is neat and cool. 2 things i however couldn't figure out. 1. I couldn't find 2 step launch, and i couldn't find flat foot shifting.

If anyone can give me some real quick pointers or tips it would really help a guy out.