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Old 03-08-2012, 07:19 PM   #1
BrandonPaquette
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Default Grimmspeed 3-Port EBCS tune 2002 wrx using Cobb ap?

hello my stock BCS is no longer working on my car and would like to put a Grimmspeed 3-Port EBCS. i know this needs a tune and i have a Cobb AP and AccessTUNER Race Beta can anyone help me tune the new EBCS or have any helpfully tips
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Old 03-08-2012, 08:16 PM   #2
Black94Snake
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contact the E-tuning vendors... Like Phatbotti Tuning
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Old 03-08-2012, 09:35 PM   #3
BrandonPaquette
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I guess I could do that but I would really like to learn how to do it on my own as one day I would like to build and fully tune my own car as I live by no tuners. And I thought that a ebcs would be a good place to start learning?
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Old 03-08-2012, 10:25 PM   #4
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they are probably the WORST place to start learning.
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Old 03-09-2012, 12:11 AM   #5
BrandonPaquette
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really what would be s good starting point ?
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Old 03-09-2012, 09:23 AM   #6
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I would not start with a EBCS and try to write the WG map for that, it does not work like the stock one.
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Old 03-09-2012, 11:51 AM   #7
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I assume it's because an EBCS requires an immediate and drastic change (~30% reduction) to the wastegate tables. Whereas, the easiest and safest way to start tuning is to make small changes and observe reactions; rinse and repeat.
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Old 03-09-2012, 05:55 PM   #8
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ok so after reading and talking to people from what i understand the waste gate duty cycles is a % of time (pre set) that work with the spring to open and close to build boost. so this would mean in a table that has TP and RPM the lower the waste gate duty cycles % the sooner the waste gate open l(ess boost) when the high the number the longer it takes to open (more boost). now dose that mean the waste gate only fully closes and fully open ??? now as for the EBCS i lower the waste gate duty cycles 30% (example 49.4 TP and 5200 RMP base map waste gate duty cycles 41.8 so taking 30% would make the new waste gate duty cycles 29.26) (right) are there any other table i have to change and if not will i still see a decrease in spool time? just to let anyone know at this point i don't want to increase my boost sitting at cobb stage 1 boost in good for me till i put a turbo back exhaust.
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Old 03-09-2012, 06:32 PM   #9
Black94Snake
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you really have absolutely no clue what you're doing you need to stop right now and go find somebody to pro tune your car
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Old 03-09-2012, 06:55 PM   #10
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is this wrong ?
This finally brings us to what a wastegate duty cycle is. A WGDC is simply a percentage of a set amount of time (say a couple of milli seconds) that the diaphragm will work with the spring to build boost. So higher wastegate duty cycles means the wastegate will stay closed longer, thus making more boost

and if im wrong instead of tell me to give up why don't you help? just want to learn

the only reason i say i have to decease the WGDC is because GrimmSpeed install guide says that i would have to decease the WGDC 30% in the 2002-2005 wrx install?

link:

https://www.grimmspeed.com/install_g...ne_version.pdf

3rd page under Installation for 2002-2005 WRX and 2004-2005 STI

Last edited by BrandonPaquette; 03-09-2012 at 07:09 PM.
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Old 03-09-2012, 07:19 PM   #11
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yes, you are wrong. The wastegate duty cycle doesnt actually actuate the wastegate at all. It controls the wastegate pressure bleed solenoid (otherwise known as a boost control solenoid)

The wastegate is opened by positive pressure and spring pressure inside the "canister". The boost control solenoid is mounted in a vac line between the turbo and the wastegate. Its purpose is to (in a controlled manner) create a boost leak between the two. The "duty cycle" that you are adjusting is a pulse width control value. Since the solenoids are either "on" or "off" the power is switched at a rapid rate to make the plunger inside the solenoid "float" at a certain open percentage.

Considering you had no real grasp on how your components actually work, I would strongly suggest you atleast get a base map from a professional.
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Old 03-09-2012, 07:46 PM   #12
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i know the wastegate duty cycle doesnt actually actuate the wastegate i know it the EBCS or for stock BCS. i understand how the BCS controls the spring pressure (when the ecu reads the target boost it tells the BCS to positive pressure the spring to open the gate allowing the exhaust gas to bypass the turbo letting the boost fall which in turn causes the the ecu to read a lower target boost letting the BDC lower pressure to the spring by leaking it in to the air intake). what i wanted to know the lower the WGDC the lower the boost build because its bleed of air make the float at a lower % amking the waste gate open sooner and opposite it the number is high ??? Im i on the right track

so is the WGDC table the only thing i would have to change because i don't want to change the target boost just not over boost.
and what about turbo dynamics table ?

im super thank full for the help black94snake im learning a lot
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Old 03-10-2012, 01:21 AM   #13
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Don't change the target boosts, its all going to be WG duty cycle adjustments. I would seriously follow the advice of this thread, get someone to send you an e-tune to get a baseline map or just have a pro tune. This is one of those deals where if you don't get it right you will be buying a short block and turbo.
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Old 03-10-2012, 01:57 AM   #14
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i have a base map im using the cobb ap stage 1 map and decreasing the WGDC by 30% mine even try 50% to start
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Old 07-28-2013, 10:21 AM   #15
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hey did ever figure out how to tune your car with the 3 port, ive run into the same problem, and want to learn how to tune my self.
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Old 07-28-2013, 11:15 AM   #16
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its easy. reduce all the wgdc tables by 50% to start out then drive around and try to hit your desired boost level. It will take a lot of small changes to the table to hit correctly. Then once you get it to hit peak boost, try and make small adjustments to the wgdc to hit boost earlier and hold longer. its really not that bad to do at all. unless you have a wbo2 don't mess with the fueling or timing.
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Old 07-28-2013, 11:48 PM   #17
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If you install the 3-port EBCS in 2-port bleed mode using only two ports in a like-stock setup, you don't need a tune. You can plug it in and go.
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Old 07-29-2013, 10:57 AM   #18
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Ok I've already tried modifying the map, -50% wdc, and I'm not hitting full boost, going to try adding 20% and see what happens
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Old 07-29-2013, 11:17 PM   #19
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Might be a better idea to add 5% at a time. Until you reach desired level. Just to play it safe.
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Old 07-30-2013, 03:44 PM   #20
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Bluemax is right. Hi sorry it took so long to answer and yes I did get it to work Spite some poeple. And a great thanks to the ones who helped me in my learning curve. I start by -30% for my wgdc but every car is diffenet well not the car so much as to the Climate. I have a summer and winter tune because I go from plus 40 to -40. But start at -50% and slowly add 2-5% till you hit your Target.
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Old 08-13-2013, 12:16 AM   #21
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Quote:
Originally Posted by bluemax189 View Post
its easy. reduce all the wgdc tables by 50% to start out then drive around and try to hit your desired boost level. It will take a lot of small changes to the table to hit correctly. Then once you get it to hit peak boost, try and make small adjustments to the wgdc to hit boost earlier and hold longer. its really not that bad to do at all. unless you have a wbo2 don't mess with the fueling or timing.

I'm scheduled for a Protune, and prefer to install the Grimmspeed 3-port EBCS at home -- before driving the 1.5hr to the tuner. I'm hoping to tweak my map so it's safe for that trip; max power not needed. Currently running a downpipe and OTS Cobb stg2 map (otherwise stock engined 2009 WRX).

It looks like I just need to modify the two WGDC tables - high and low, in the Boost Control Folder (AccessTUNER Race) by: selecting all the cells in each one, multiplying values by 0.5, then saving and flashing the new map.

Have I got this right; red flags anyone?
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Old 08-13-2013, 07:46 AM   #22
Black94Snake
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Quote:
Originally Posted by Mucho Maas View Post
I'm scheduled for a Protune, and prefer to install the Grimmspeed 3-port EBCS at home -- before driving the 1.5hr to the tuner. I'm hoping to tweak my map so it's safe for that trip; max power not needed. Currently running a downpipe and OTS Cobb stg2 map (otherwise stock engined 2009 WRX).

It looks like I just need to modify the two WGDC tables - high and low, in the Boost Control Folder (AccessTUNER Race) by: selecting all the cells in each one, multiplying values by 0.5, then saving and flashing the new map.

Have I got this right; red flags anyone?
load the economy map and drive there.
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Old 08-13-2013, 12:41 PM   #23
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You're over-thinking it. You're not racing to your tuner, you're driving there for a tune. Zero out your entire wastegate map (high and low) and you can drive there on wastegate boost.
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Old 08-13-2013, 02:12 PM   #24
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Quote:
Originally Posted by BrandonPaquette View Post
Bluemax is right. Hi sorry it took so long to answer and yes I did get it to work Spite some poeple. And a great thanks to the ones who helped me in my learning curve. I start by -30% for my wgdc but every car is diffenet well not the car so much as to the Climate. I have a summer and winter tune because I go from plus 40 to -40. But start at -50% and slowly add 2-5% till you hit your Target.
Hey buddy don't let people discourage you in learning to tune. I started the same way you are. I got the GS EBCS and started to learn how to tune wgdc's. I read all I could on how the subaru boost system worked and what the EBCS's did. With a lot of help from helpful people and no giving up I was able to learn it and tune it. I wanted to learn more and tune my car myself, so I started reading everything Cobb had to offer. Talking to their tuners and asking questions. Reading all the engine management and tuning books I could find. I learned also through trial and error with my car and after a while I was and I am able to tune my own car for whatever I decide to do with it. Now without the dyno it takes more time and patience cause you're road tuning but it is worth it in the end. So don't give up man and keep asking questions. There are a lot of people out there willing to help. Check out my build on the proven power bragging forum on this site and see the numbers I have, it's possible. Pm me or ask me any questions you want and ill do my best to help you out talk to you soon.
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Old 08-14-2013, 12:24 PM   #25
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Quote:
Originally Posted by atomicfire View Post
You're over-thinking it. You're not racing to your tuner, you're driving there for a tune. Zero out your entire wastegate map (high and low) and you can drive there on wastegate boost.
Thanks for the input. As a novice, I don't know what I don't know, and over/incorrect-thinking is part of the learning process. That's why I'm here asking questions.

Do you feel that there is an advantage to reducing the wastegate table values completely (vs 50%)? Aside from the extent, it seems implementation would be identical.
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