Cobb Tuning Access Port Is Now Available For The Evo X!
That is what I needed to know, thanks!
Do you know if just replacing the stock boost lines with new ones that don't have restrictor pills will help the stock BS hold boost better? Vacuum lines can be picked up at a local auto parts store and installed in place of the stock ones pretty easily, that is why I ask.
Do the restrictor pills provide some type of overboost failsafe or something? If not, what is the point of them being there since actual boost can be controlled with the BS?
Do you know if just replacing the stock boost lines with new ones that don't have restrictor pills will help the stock BS hold boost better? Vacuum lines can be picked up at a local auto parts store and installed in place of the stock ones pretty easily, that is why I ask.
Do the restrictor pills provide some type of overboost failsafe or something? If not, what is the point of them being there since actual boost can be controlled with the BS?
By altering the pill size we can effect the way in which the stock hose system works
Any time you alter the pills you would need a custom tune - UNLESS and limited to those situations where the Cobb base map specifies a modified pill size
When in doubt - review the map description that comes with every AP map that lists what mods and fuel the map is made for (a/k/a LONG DESCRIPTION)
Al
That is what I needed to know, thanks!
Do you know if just replacing the stock boost lines with new ones that don't have restrictor pills will help the stock BS hold boost better? Vacuum lines can be picked up at a local auto parts store and installed in place of the stock ones pretty easily, that is why I ask.
Do the restrictor pills provide some type of overboost failsafe or something? If not, what is the point of them being there since actual boost can be controlled with the BS?
Do you know if just replacing the stock boost lines with new ones that don't have restrictor pills will help the stock BS hold boost better? Vacuum lines can be picked up at a local auto parts store and installed in place of the stock ones pretty easily, that is why I ask.
Do the restrictor pills provide some type of overboost failsafe or something? If not, what is the point of them being there since actual boost can be controlled with the BS?
I have a feeling cobb will be offering the lines with the smaller pills and maps for them for their stg 2 maps. But no final word yet.
By way of update, I have ordered my initial stocking order from Cobb Today which will arrive tomorrow
All orders which I have recieved will ship tomorrow via fed ex
Through the x mass holiday I will continue to offer free overnight fed ex shipping on these, although my free map offer is now over
I will be tuning a couple of Evo X's with the AP tomorrow and will make a few videos
Al
All orders which I have recieved will ship tomorrow via fed ex
Through the x mass holiday I will continue to offer free overnight fed ex shipping on these, although my free map offer is now over
I will be tuning a couple of Evo X's with the AP tomorrow and will make a few videos
Al
For those that need instant gratification we do have them in stock and can ship out today. Cobb has offered a 10% off deal so we will be honoring the 10% discount for now.
Thanks for all the answers on the stock boost lines and restrictor pills, much appreciated!
With a MBC restrictor pills of any type are not needed, correct?
I understand how the restrictor pills work now, but I guess it still doesn't make sense why they are needed with the stock BS if they are not needed with a MBC. Is the stock BS (in conjunction with the ECU of course) not capable of completely controlling boost on its own like a MBC is?
With a MBC restrictor pills of any type are not needed, correct?
I understand how the restrictor pills work now, but I guess it still doesn't make sense why they are needed with the stock BS if they are not needed with a MBC. Is the stock BS (in conjunction with the ECU of course) not capable of completely controlling boost on its own like a MBC is?
Christian from Cobb wrote something about this in his explanation on how the Subaru boost control system works. I think his explanation of it is better then I could write.
So you can see why the put them in there. A MBC does not need this because it is designed to not have them. The spring in it is designed to compress at certain pressures. You could make a solenoid work without a pill it would just be difficult and you would probably need to upgrade to a super heavy duty(read expensive) solenoid.
Changing the size of the center hole in the restrictor pill; the vacuum lines for the factory boost control system contain a small brass restrictor pill located in the short vacuum line coming off the turbo compressor housing. The middle of this restrictor pill has a lengthwise hole precisely machined to a certain specification so that it works with the factory wastegate actuator and the wastegate duty cycle settings in the stock ECU. The size of this center hole can be changed in order to mechanically assist boost control.
A smaller diameter hole in the center of the brass restrictor pill will have a higher tendency to create boost spike in the system and require less wastegate duty cycle to run higher boost. The larger the diameter hole in the center of the restrictor pill, the less chance the boost control system will boost spike and greater wastegate duty cycle will need to run in order to produce higher boost.
A smaller diameter hole in the center of the brass restrictor pill will have a higher tendency to create boost spike in the system and require less wastegate duty cycle to run higher boost. The larger the diameter hole in the center of the restrictor pill, the less chance the boost control system will boost spike and greater wastegate duty cycle will need to run in order to produce higher boost.
Christian from Cobb wrote something about this in his explanation on how the Subaru boost control system works. I think his explanation of it is better then I could write.
So you can see why the put them in there. A MBC does not need this because it is designed to not have them. The spring in it is designed to compress at certain pressures. You could make a solenoid work without a pill it would just be difficult and you would probably need to upgrade to a super heavy duty(read expensive) solenoid.
So you can see why the put them in there. A MBC does not need this because it is designed to not have them. The spring in it is designed to compress at certain pressures. You could make a solenoid work without a pill it would just be difficult and you would probably need to upgrade to a super heavy duty(read expensive) solenoid.
In simple terms...
A 3 port boost solenoid works without pills by design.
The factory solenoids(2) are 2 port and need the restriction on the positive pressure side to work correctly
The advantage to keeping the stock Ecu-boost control and just enhancing it (upgraded pill) is that you keep the pretty sophisticated factory boost control.
Some features of this are:
1. 18 point RPM based boost control
2. 9 point throttle based boost control (throttle %)
3. Two boost control tables for different driving styles
4. *gear based* boost control (The MR model uses this from the factory to limit boost in 1st gear from peak boost to around 5,000 rpm. The GSR does not use this feature. Both can be tuned to use it and use it in a performance aspect, example being more boost in 1st and 2nd and less in higher gears, or vice versa)
5. Full boost error correction (will increase or decrease boost to meet tuned target boost levels). This keeps the boost curve in check in different weather, road grades, load, etc
A 3 port boost solenoid works without pills by design.
The factory solenoids(2) are 2 port and need the restriction on the positive pressure side to work correctly
The advantage to keeping the stock Ecu-boost control and just enhancing it (upgraded pill) is that you keep the pretty sophisticated factory boost control.
Some features of this are:
1. 18 point RPM based boost control
2. 9 point throttle based boost control (throttle %)
3. Two boost control tables for different driving styles
4. *gear based* boost control (The MR model uses this from the factory to limit boost in 1st gear from peak boost to around 5,000 rpm. The GSR does not use this feature. Both can be tuned to use it and use it in a performance aspect, example being more boost in 1st and 2nd and less in higher gears, or vice versa)
5. Full boost error correction (will increase or decrease boost to meet tuned target boost levels). This keeps the boost curve in check in different weather, road grades, load, etc
EvoM Guru
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...
So you can see why the put them in there. A MBC does not need this because it is designed to not have them. The spring in it is designed to compress at certain pressures. You could make a solenoid work without a pill it would just be difficult and you would probably need to upgrade to a super heavy duty(read expensive) solenoid.
So you can see why the put them in there. A MBC does not need this because it is designed to not have them. The spring in it is designed to compress at certain pressures. You could make a solenoid work without a pill it would just be difficult and you would probably need to upgrade to a super heavy duty(read expensive) solenoid.
I think that's an overstatement of the cost of suitable aftermarket solenoids for boost control. The GM BCS, which as proven to work very well on the Evo 8/9, is only about $35 from Rock Auto. Toss in another $10-$15 for replacement hose without any pills, and for ~$50, a much wider range of boost control can be had over the stock system or an MBC while still retaining all the safety features, tunability, and stability provided by the ECU-based boost control algorithm. The only downside to running a 3-port solenoid is that while an MBC is easy to tune (turn a knob until the boost range falls within acceptable upper/lower limits), the 3-port takes more work to tune. Its not for everyone, but for those who are willing to take the time to tune it, a solid step beyond an MBC.
In simple terms...
A 3 port boost solenoid works without pills by design.
The factory solenoids(2) are 2 port and need the restriction on the positive pressure side to work correctly
The advantage to keeping the stock Ecu-boost control and just enhancing it (upgraded pill) is that you keep the pretty sophisticated factory boost control.
Some features of this are:
1. 18 point RPM based boost control
2. 9 point throttle based boost control (throttle %)
3. Two boost control tables for different driving styles
4. *gear based* boost control (The MR model uses this from the factory to limit boost in 1st gear from peak boost to around 5,000 rpm. The GSR does not use this feature. Both can be tuned to use it and use it in a performance aspect, example being more boost in 1st and 2nd and less in higher gears, or vice versa)
5. Full boost error correction (will increase or decrease boost to meet tuned target boost levels). This keeps the boost curve in check in different weather, road grades, load, etc
A 3 port boost solenoid works without pills by design.
The factory solenoids(2) are 2 port and need the restriction on the positive pressure side to work correctly
The advantage to keeping the stock Ecu-boost control and just enhancing it (upgraded pill) is that you keep the pretty sophisticated factory boost control.
Some features of this are:
1. 18 point RPM based boost control
2. 9 point throttle based boost control (throttle %)
3. Two boost control tables for different driving styles
4. *gear based* boost control (The MR model uses this from the factory to limit boost in 1st gear from peak boost to around 5,000 rpm. The GSR does not use this feature. Both can be tuned to use it and use it in a performance aspect, example being more boost in 1st and 2nd and less in higher gears, or vice versa)
5. Full boost error correction (will increase or decrease boost to meet tuned target boost levels). This keeps the boost curve in check in different weather, road grades, load, etc
.
I am unsure on that
Since the first thing the AP does when it is installed is to suck out the OEM data and store it on the AP, I am unsure what the ecu will look like after the data is transfered back onto the ecu when and if it is uninstalled.
I am nearly 100% certain the CVN will line up 100%
It remains to be tested to determine what trace - if any - is left of the process.
Al
Since the first thing the AP does when it is installed is to suck out the OEM data and store it on the AP, I am unsure what the ecu will look like after the data is transfered back onto the ecu when and if it is uninstalled.
I am nearly 100% certain the CVN will line up 100%
It remains to be tested to determine what trace - if any - is left of the process.
Al
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From: Philly
Sorry if these are obvious to other people, but I have a few questions:
1. If the car gets a reflash at service time(which mine did apparently when I brought it in for its first service) can you download that new one to the AP?
2. I saw the maps on the website state factory air filter required. If I have a HKS drop-in how can I get a map that takes it into account?
3. Are there any threats to my warranty for using this device? Would I want to flash it back to stock before I take it in to the dealer for service? Keep in mind I am not asking for anyone's opinion on where to get my car serviced.
Cheers!
And to my fellow MR owners, there were maps for the 08 MR on the Cobb web site, so our cars are supported. I saw no one had answered that question specifically yet.
1. If the car gets a reflash at service time(which mine did apparently when I brought it in for its first service) can you download that new one to the AP?
2. I saw the maps on the website state factory air filter required. If I have a HKS drop-in how can I get a map that takes it into account?
3. Are there any threats to my warranty for using this device? Would I want to flash it back to stock before I take it in to the dealer for service? Keep in mind I am not asking for anyone's opinion on where to get my car serviced.
Cheers!
And to my fellow MR owners, there were maps for the 08 MR on the Cobb web site, so our cars are supported. I saw no one had answered that question specifically yet.
2. I saw the maps on the website state factory air filter required. If I have a HKS drop-in how can I get a map that takes it into account?
3. Are there any threats to my warranty for using this device? Would I want to flash it back to stock before I take it in to the dealer for service? Keep in mind I am not asking for anyone's opinion on where to get my car serviced.