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Old 08-28-2012, 04:00 PM   #1
lj8915
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Default Don't know ANYTHING about tuning. Few questions..

I'm looking into stage 1 just to get rid of the crappy stock tune. I have a few questions:

1. Can I just plug in something, put the tune in, and be done with it? Or do I have to constantly mess with settings and do tweaking to make everything right?

2. Will I get knock with a stage 1 tune since I only have access to 91 octane gas?

3. Can I flash back to stock for warranty purposes?
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Old 08-28-2012, 07:37 PM   #2
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The COBB AccessPort has both a 91 Octane map and a 93 Octane map. You'll definitely like it better than the stock tune IMO. I didn't have to tweak anything, although there is also a high and low map if your monitored boost level is off a bit. I am currently running the TorquedPerformance Stage 1 map which according to their documentation is good for both 91 and 93 octane without having to switch back and forth though I only use 93 here in Texas. Yes, you can unmarry the AP which reinstalls the factory map.
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Old 08-28-2012, 07:54 PM   #3
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1. No flash and done
2. You can knock on the stock tune, stage 1 is supposedly healthier for your car
3. Yes, but just be weary they can check for flashes and they can deny warranty claims

Look into opensource if you're going only stage one just get a tactrix cable or borrow one and flash a torqued performance tune over (Torquedperformance.com). For 85$ he tweaks your tune, basically like a mini pro tune.
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Old 08-29-2012, 08:15 AM   #4
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Quote:
Originally Posted by lj8915 View Post
I'm looking into stage 1 just to get rid of the crappy stock tune. I have a few questions:

1. Can I just plug in something, put the tune in, and be done with it? Or do I have to constantly mess with settings and do tweaking to make everything right?

2. Will I get knock with a stage 1 tune since I only have access to 91 octane gas?

3. Can I flash back to stock for warranty purposes?
Hi there.

The AccessPORT is designed to be plug-and-play and very easy to set up. You simply connect the device to the OBD port of your car and select the install option on the screen. The AccessPORT version 2 (i.e. current version) will back-up a copy of your engine control unit's (ECU) image which will be restored when you choose to uninstall the AccessPORT (restoring it to the original configuration before you installed).

We have a variety of different off-the-shelf OTS maps, including those for different octane gas - 93, 91 and 91ACN (for poorer Arizona California Nevada fuels). Most vehicles also have low and high wastegate versions of the maps which can be used if your particular car is underboosting (use high) or overboosting (use low). The version 2 AccessPORT also has standalone data logging which is very easy to use (see video below). You aren't required to data log, but it is a good idea to do so (regardless of whether you are using our solution or another). You can post your log here and we can take a look at it. One of the main reasons that we recommend data logging is that cars can have mechanical issues that you may not be aware of (i.e. may not be obvious just from driveability) so it is good to get a few logs.


Bill
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Old 08-29-2012, 07:40 PM   #5
lj8915
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I noticed your website shows they are out of stock. Any idea when they'll be back in?
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Old 08-30-2012, 08:21 AM   #6
Cobb Tuning
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Originally Posted by lj8915 View Post
I noticed your website shows they are out of stock. Any idea when they'll be back in?
I don't have an ETA right now - but you can also check with independent shops that sell the AccessPORT. They may have some in stock they can sell you.

http://www.cobbtuning.com/Domestic-D...rs-s/70753.htm

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Old 09-16-2012, 07:33 PM   #7
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I'm interested in this again but have a few more questions...

1. I would have to use the 91acn map because I'm in California. What is the expected gain in HP/tq with this? I've seen dynos, but not with the 91acn tune only.

2. Is it possible that this tune can be more dangerous than stock? I just bought a 30k car so the last thing I want to do is damage anything.

3. How often do I have to data log to make sure everything is OK? Is it just a one time thing or do I have to do it all the time (meaning will the tune change seomthing or something else change in the long run)?


Thanks.
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Old 09-17-2012, 09:30 AM   #8
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Originally Posted by lj8915 View Post
I'm interested in this again but have a few more questions...

1. I would have to use the 91acn map because I'm in California. What is the expected gain in HP/tq with this? I've seen dynos, but not with the 91acn tune only.

2. Is it possible that this tune can be more dangerous than stock? I just bought a 30k car so the last thing I want to do is damage anything.

3. How often do I have to data log to make sure everything is OK? Is it just a one time thing or do I have to do it all the time (meaning will the tune change seomthing or something else change in the long run)?


Thanks.
1. You can go to the maps section at cobbtuning.com, select Subaru,and then select your vehicle. From there, you will see a list of all the maps available. In the heading, there is a link to "[notes]" which is a pdf that show you the relative power gains for each of the different maps in that category.

2. In some ways, our maps are safer that stock as they eliminate the extended closed loop to open loop transition in the stock tune that causes you to stay too lean well into boost. That said, you are increasing the performance of the vehicle quite a bit over stock with these maps and modifications. More power means more stress on the engine, transmission, etc. A lot of it depends on how you drive the car. If you are abusing the car with hard launches, etc., then more power is only going make things worse and increase the chances of reliability issues. If you are using the wrong parts for the map or you gas quality is poor, then this can also present a problem.

3. Logging isn't required, but is good practice. You can do some initial data logs to see where you are at. If conditions change (you move or start using different gas that may be suspect), then it would be a good idea to data log again.

Bill
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Old 09-17-2012, 06:49 PM   #9
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Just purchased one.

Just to confirm, if I ever want to go back to stock, it's easy right? And if I go back to stock, will it run like it did 100% stock from the factory, or will it never run the same because the ECU has been messed with?
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Old 09-17-2012, 07:16 PM   #10
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Originally Posted by lj8915 View Post
Just purchased one.

Just to confirm, if I ever want to go back to stock, it's easy right? And if I go back to stock, will it run like it did 100% stock from the factory, or will it never run the same because the ECU has been messed with?
you just need to do a simple uninstallation. You will never know that the accessport was ever installed, after you remove it.
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Old 09-17-2012, 08:27 PM   #11
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Word. I just went stage 1. Got my cobb AP from boston motorsports.

I will do the data logging tomorrow. Took a spin around the block, definatley felt the difference. No engine lights or crazy stuff.

Good stuff!

-chet
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Old 09-17-2012, 09:13 PM   #12
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So I'm guess with the acn map I can expect around 10-15whp and 15-20tq? Or is it less than that since its acn?
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Old 09-18-2012, 09:24 AM   #13
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So I'm guess with the acn map I can expect around 10-15whp and 15-20tq? Or is it less than that since its acn?
We give the percentage gains in our map notes, which can be found here:
https://static.cobbtuning.com/cobbtu...XM_12_v310.pdf

Actual gains in HP or torque depends on what you are starting with which can vary by the car and conditions. The 91ACN maps will see the least gains simply because of the poor fuel quality that is inherent to that area. Those maps have to be more conservative otherwise most of the cars would potentially have knock issues.

When you uninstall the version 2 AccessPORT, it will return your ECU to the original image it had when you first installed the AccessPORT, thus returning it to its original state. There will be no difference in how it runs/operates after you uninstall compared to before you installed.

Bill
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Old 09-19-2012, 11:48 PM   #14
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Does the accessport monitor a/f ratio too?

I'm getting this thing tomorrow and basically want to things....little more power and to make sure I'm completely safe.
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Old 09-20-2012, 06:24 AM   #15
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Quote:
Originally Posted by lj8915
Does the accessport monitor a/f ratio too?

I'm getting this thing tomorrow and basically want to things....little more power and to make sure I'm completely safe.
The accessport doesn't actually monitor anything. It allows you to look into your ECU data stream and watch what is going on. As for the a/f question. You can view your front O2 sensor data, but the information gathered from it should not be used to tune while under boost. For that, you need a wideband O2 that needs to be mounted AFTER the turbo.
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Old 09-20-2012, 09:39 AM   #16
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Does the accessport monitor a/f ratio too?

I'm getting this thing tomorrow and basically want to things....little more power and to make sure I'm completely safe.
The version 2 AccessPORT (i.e. current version), allows you to data log or view live a number of different ECU monitors. Check out our data logging video below for details. A WOT data log, taken as described in the video posted earlier (if you can do so safely), is a good general test to see how your car is responding to a given map.

You can monitor the front o2 sensor (A/F Sensor 1 Ratio) via the AccessPORT, but as Black94Snake mentioned, it is not very accurate under boost. However, you can potentially indirectly determine if there is a fueling issue by monitoring the A/F Learning 1 A,B,C,D long-term fuel trims. After going through about a tank of gas (since installing the AccessPORT, resetting the ECU, reflashing a new map, or disconnecting the car's battery), you can check to see if they are within about +/- 5%. If any one of them is well outside of that (say beyond +/- 8%), then you may have a fueling problem (08+ STis tend to see more extreme trims than the rest, so the +/- 8% is better rule of thumb for those cars).

Bill
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Old 09-20-2012, 01:52 PM   #17
lj8915
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Originally Posted by Black94Snake View Post
The accessport doesn't actually monitor anything. It allows you to look into your ECU data stream and watch what is going on. As for the a/f question. You can view your front O2 sensor data, but the information gathered from it should not be used to tune while under boost. For that, you need a wideband O2 that needs to be mounted AFTER the turbo.

So hold on a second....

There is absolutely no way to know if I'm running completely safe on a cobb map unless I buy a wideband too?

Looks like I'll be sending the accessport back.
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Old 09-20-2012, 01:59 PM   #18
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So hold on a second....

There is absolutely no way to know if I'm running completely safe on a cobb map unless I buy a wideband too?

Looks like I'll be sending the accessport back.
Data logging via the AccessPORT will tell if you the tune is safe for your car and fuel quality. It will show you if there is any knock response, among other parameters to determine if you have any issues or not.

Bill
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Old 09-20-2012, 02:03 PM   #19
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But it will not tell me the a/f ratio under boost, which is one of the main things you need to see (when messing with boost) to see if your car is running safe, right? Sorry, I'm new to turbo cars so I want to make sure I understand everything correctly.

Also I noticed it says the target boost for stage 1 is 14.5psi, but using my torque app on my android phone (with an obd that reads from the ecu), I was hitting 15.5 psi a few times. And that info comes directly from my ecu.
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Old 09-20-2012, 02:41 PM   #20
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But it will not tell me the a/f ratio under boost, which is one of the main things you need to see (when messing with boost) to see if your car is running safe, right? Sorry, I'm new to turbo cars so I want to make sure I understand everything correctly.

Also I noticed it says the target boost for stage 1 is 14.5psi, but using my torque app on my android phone (with an obd that reads from the ecu), I was hitting 15.5 psi a few times. And that info comes directly from my ecu.
It isn't necessary to directly read an accurate AFR under boost at the stage 1 or stage 2 level, which are relatively mild mod levels and boost. Data logging is perfectly sufficient and will tell you if there is any abnormal knock response, whether airflow/load is at appropriately levels for your mods (meaning the Mass Airflow sensor is working properly), what boost response looks like, etc. You can also monitor your long-term fuel trims over time (as described before) which will indicate (indirectly) if there is a fueling issue.

When you start going with bigger turbo/injectors or are attempting to modify tunes yourself, getting a wideband (which you can monitor via our AccessTUNER software if supported) starts becoming something to think about.

Bill
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Old 09-20-2012, 02:46 PM   #21
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What about the target boost levels? It almost sounds like I would be losing power with stage 1 if the target boost on that is 14.5 and I'm hitting over 15 stock.
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Old 09-20-2012, 02:48 PM   #22
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Quote:
Originally Posted by lj8915

So hold on a second....

There is absolutely no way to know if I'm running completely safe on a cobb map unless I buy a wideband too?

Looks like I'll be sending the accessport back.
No standard tuning system will tell you your actual AFR while in boost. Not even that crap torque app. The Cobb maps will be fine for your car as long as you stick to their prescribed mods list. And assuming you have no mechanical faults with the car.

You really should get a wideband anyway.
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Old 09-20-2012, 03:10 PM   #23
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I'm ASSUMING that the stage 1 runs safer than stock since stg1 runs richer, but it's not good to assume.

I don't want a wideband. I don't plan for any other mods at all. Just wanted stg1 for a smoother power/tq curve.
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Old 09-20-2012, 03:13 PM   #24
Black94Snake
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Quote:
Originally Posted by lj8915
I'm ASSUMING that the stage 1 runs safer than stock since stg1 runs richer, but it's not good to assume.

I don't want a wideband. I don't plan for any other mods at all. Just wanted stg1 for a smoother power/tq curve.
Pfft... Yea, ok. Just like when I said I wasn't going to mod my WRX...
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Old 09-20-2012, 03:20 PM   #25
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Pfft... Yea, ok. Just like when I said I wasn't going to mod my WRX...
If I do, then I'll buy a wideband. My point is I don't want to buy a wideband if I'm completely stock other than stage 1.
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