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Old 03-07-2012, 07:07 PM   #1
Grusselgrosser
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Default Overboosting? Knock? Stage 1 aem cobb.

Sent an email to cobb. No reply yet. It was boosting at 18.5 but tonight it was a more normal 16.5. Cylinders 2 and 4 were 31 and 43 on the knock sum value, not 1 and 3 like I wrote. Thanks for any input. Sent email-

"Hey,I was wondering if you could help me with something else. So I have a 2011 wrxwith a catback,aem intake and stage 1 93 +aem v300. This map says peak boost is 17psi but using the ap boost gauge I have seen it go up as high as 18.5 psi when at WOT. Is this considered overboosting and is it anything to worry about? Also after driving the car for a while, even if I haven been boosting very much at all, on the ap it will show knock sum values of 31-45 or so in cylinders 1+3 but 2+4 are 5 or less. When the car has just been started up in the morning it shows no knock in any cylinders. Is this abnormal and anything to worry about? Should I be using E-85 gas instead of 93-94? Thanks."
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Old 03-07-2012, 08:10 PM   #2
2Fast4U1DAY
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Quote:
Originally Posted by Grusselgrosser View Post
Sent an email to cobb. No reply yet. It was boosting at 18.5 but tonight it was a more normal 16.5. Cylinders 2 and 4 were 31 and 43 on the knock sum value, not 1 and 3 like I wrote. Thanks for any input. Sent email-

"Hey,I was wondering if you could help me with something else. So I have a 2011 wrxwith a catback,aem intake and stage 1 93 +aem v300. This map says peak boost is 17psi but using the ap boost gauge I have seen it go up as high as 18.5 psi when at WOT. Is this considered overboosting and is it anything to worry about? Also after driving the car for a while, even if I haven been boosting very much at all, on the ap it will show knock sum values of 31-45 or so in cylinders 1+3 but 2+4 are 5 or less. When the car has just been started up in the morning it shows no knock in any cylinders. Is this abnormal and anything to worry about? Should I be using E-85 gas instead of 93-94? Thanks."
First you are asking this in the wrong froum. this should be in engine managment and tuning. Preferably in the AccessPORT sub forum.

Second Knock sum is a very poor indicator of knock. We dont know if you are actually knocking or not, because you didnt post a log.

Third what gear are you doing pulls in when you see 17.5psi?

And last but not least, NO YOU CANT USE E85 ON A E10 (93-94 octane with 10% ethanol) tune.

You have A LOT of researching to do. It sounds like you did all of this backwards. You research, than you research, then you research some more, and guess what you research MORE and THEN you modify, not the other way around.

Do us all favor. First off make sure your firmware and maps up to date on the AP by connecting it to AP Manager which can be dowloaded on cobbs website under the support section. Set your logging parameters on the AP to default. Take a WOT 3rd gear datalog from 2500rpm-near redline if you can do so safely. Start logging just before you mash the throttle, and stop logging once you shift, or lift off the throttle. Host the document on google docs, set the permissions to public and then post the link. We will be able to determine better what is going on....


EDIT: I see that you are local. I live In Jennersville which is about 20 mins away. if you need a hand with anything, just give me a shout. Im usually in your area 2-3 times a week.

Last edited by 2Fast4U1DAY; 03-07-2012 at 08:11 PM. Reason: saw the Op was local
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Old 03-07-2012, 08:26 PM   #3
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I took a log, I'll see if I can get it up here. And yeah, I'm pretty lazy so I never do as much research as I should. I usually just count on asking people who deal with this stuff alot.
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Old 03-07-2012, 08:57 PM   #4
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try the low wastegate map if you are overboosting.
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Old 03-07-2012, 09:31 PM   #5
2Fast4U1DAY
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Originally Posted by jerbull88 View Post
try the low wastegate map if you are overboosting.
We dont know if hes really overboosting or not because we dont have any data to look at. He could be trying to go WOT in a higher gear (4th or 5th), where our cars are prone to overboost. He may just be seeing an initial spike and then the boost control system does its job and limits boost with wgdc and all could be well. All of this is pure speculation though because we have no data to analyze.
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Old 03-08-2012, 02:03 AM   #6
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Trying to upload my log but have to reinstall ap manager and cobbs site keeps timing out on me.
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Old 03-08-2012, 02:31 AM   #7
2Fast4U1DAY
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Quote:
Originally Posted by Grusselgrosser
Trying to upload my log but have to reinstall ap manager and cobbs site keeps timing out on me.
It's all good man. Just don't push it past target boost and you should be fine. Just the the data to us when you can.
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Old 03-08-2012, 07:52 AM   #8
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Ok, I made this last night, it's a couple minutes long though, I think it was WOT in 2nd up to 4th or so, and then let off the throttle and cruised a bit. Thanks.


https://docs.google.com/spreadsheet/...EVPeGhfWFN3UXc
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Old 03-08-2012, 08:49 AM   #9
2Fast4U1DAY
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Quote:
Originally Posted by Grusselgrosser View Post
Ok, I made this last night, it's a couple minutes long though, I think it was WOT in 2nd up to 4th or so, and then let off the throttle and cruised a bit. Thanks.


https://docs.google.com/spreadsheet/...EVPeGhfWFN3UXc

You arent very good at following directions are you? I said Third gear for a reason, I didnt just pull that out of my ass.... Third gear is there they calibrate everything in the tune, so thats the gear you need to take logs in. No and then.

Im not even going to bother looking at your log because theres going to be wayyy too much data in there to try and decipher when you are in third gear. Try again AND FOLLOW THE ******* DIRECTIONS IF YOU WANT OUR HELP! Get rid of whatever you "think" I need to see, because I need to see THE DEFAULT LOGGING PARAMETERS, which are:

A/F Learning 1 (%)
Boost (psi)
Calculated Load (g/rev)
DAM
Dynamic advance
Feedback Knock
Fine Knock Learn
Ignition timing
MAF (v)
MAF (g/s)
TD Boost Error (PSI)
Throttle Position (%)
Wastegate Duty Cycle

I told you not to even look at knock sum, and you took out some of the crucial infrmation and replaced it with knock sum and knock active switch? WTF? Get rid of anything thats not on ^^ that list as its irrelevent.

Make sure your firmware and maps up to date on the AP by connecting it to AP Manager which can be dowloaded on cobbs website under the support section. Set your logging parameters on the AP to default. Take a WOT 3rd gear datalog from 2500rpm-near redline if you can do so safely. Start logging just before you mash the throttle, and stop logging once you shift, or lift off the throttle. Either do it right, or dont expect us to help you

Last edited by 2Fast4U1DAY; 03-08-2012 at 09:10 AM.
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Old 03-08-2012, 09:01 AM   #10
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I made that before I read your post. Ill make another today though with those parameters. And all firmware is up to date.
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Old 03-08-2012, 09:37 AM   #11
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I appreciate your help but chill out dude.
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Old 03-08-2012, 09:48 AM   #12
2Fast4U1DAY
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Quote:
Originally Posted by Grusselgrosser View Post
I appreciate your help but chill out dude.
Im not mad lol I was just trying to get my point across. Sorry if it came off that way, like I said though, if you want our help, you must follow directions.
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Old 03-08-2012, 10:43 AM   #13
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Looking at your logs, I see you only once had a very small boost spike (only once) to ~ 17.3 right when you went full throttle, which was immediately corrected by the waste gate duty cycle (in the ECU). I would say as a tuner a little tweak in the WGDC table could easily fix this. In that boost spike you got a very small knock (1.4 degree as seen in the log) also (not a big deal). I could help you with the tune if you are interested, PM me.
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Old 03-08-2012, 11:01 AM   #14
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This is the funniest log I've ever seen

But yes, set to default parameters and do one smooth pull at WOT from 2k-6.5k if you can do so safely.

Partial and cruise logs can be useful as well, but they capture different scenarios and stresses on your car; your best bet for feedback on the forums is a good WOT pull or two.
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Old 03-08-2012, 02:22 PM   #15
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Thanks guys, going to make a proper log on my way home from work tonight.
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Old 03-08-2012, 08:58 PM   #16
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Well I got most of the relevant data with this log, but it still recorded knock sum and rpm even though i know i turned them OFF and turned a few of the other ones that you said ON. Not sure what happened. This is a 3rd gear pull though from about 2500 rpm to 7000. If this still isnt enough data to tell if there's an issue or not, I can try again tomorrow and see if I can figure out why it didn't record everything I told it to.

https://docs.google.com/spreadsheet/...VE4M1BxUnhOWUE
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Old 03-08-2012, 09:07 PM   #17
Grusselgrosser
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And is there a glossary somewhere that I can find out what all of the data choices you can view on the AP mean? For most of them I have a general idea what they mean but not all of them. There's not much point in me monitoring my engine if I have no idea what the data means I'm looking at.
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Old 03-08-2012, 09:28 PM   #18
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That one looks pretty clean
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Old 03-08-2012, 09:53 PM   #19
2Fast4U1DAY
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Quote:
Originally Posted by Grusselgrosser
Well I got most of the relevant data with this log, but it still recorded knock sum and rpm even though i know i turned them OFF and turned a few of the other ones that you said ON. Not sure what happened. This is a 3rd gear pull though from about 2500 rpm to 7000. If this still isnt enough data to tell if there's an issue or not, I can try again tomorrow and see if I can figure out why it didn't record everything I told it to.

https://docs.google.com/spreadsheet/...VE4M1BxUnhOWUE
Meh. Its all good buddy. The log looks good. No knock, not overboosting, and no extreme fuel corrections. Everything seems to be in order. Enjoy! :-)
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Old 03-08-2012, 10:16 PM   #20
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Well thats a load off my mind. Thanks. Now I can just enjoy my car. I sent you a friend request if it's cool, would like to be able to easily contact you in the future about any other issues or concerns that may arise.
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Old 03-08-2012, 11:17 PM   #21
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Quote:
Originally Posted by Grusselgrosser
And is there a glossary somewhere that I can find out what all of the data choices you can view on the AP mean? For most of them I have a general idea what they mean but not all of them. There's not much point in me monitoring my engine if I have no idea what the data means I'm looking at.
Its not a glossary, but it will help you understand what you are looking at...
http://forums.nasioc.com/forums/show....php?t=1626520

There is also a lot of good info on the COBB and RomRaider forums.
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Old 03-09-2012, 09:09 PM   #22
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Quote:
Originally Posted by Grusselgrosser View Post
And is there a glossary somewhere that I can find out what all of the data choices you can view on the AP mean? For most of them I have a general idea what they mean but not all of them. There's not much point in me monitoring my engine if I have no idea what the data means I'm looking at.


http://www.cobbtuning.com/Technical-...es-s/60000.htm
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Old 03-12-2012, 06:25 PM   #23
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Quote:
Originally Posted by Grusselgrosser View Post
And is there a glossary somewhere that I can find out what all of the data choices you can view on the AP mean? For most of them I have a general idea what they mean but not all of them. There's not much point in me monitoring my engine if I have no idea what the data means I'm looking at.
Check out this AccessTUNER Race tuning documentation for definitions.

Ian
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Old 09-04-2017, 01:16 PM   #24
StarkWRX
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Default 2006 WRX TR with Cobb SF intake, TurboXS turbo back and Stage 1 map

Quote:
Originally Posted by Grusselgrosser View Post
Sent an email to cobb. No reply yet. It was boosting at 18.5 but tonight it was a more normal 16.5. Cylinders 2 and 4 were 31 and 43 on the knock sum value, not 1 and 3 like I wrote. Thanks for any input. Sent email-

"Hey,I was wondering if you could help me with something else. So I have a 2011 wrxwith a catback,aem intake and stage 1 93 +aem v300. This map says peak boost is 17psi but using the ap boost gauge I have seen it go up as high as 18.5 psi when at WOT. Is this considered overboosting and is it anything to worry about? Also after driving the car for a while, even if I haven been boosting very much at all, on the ap it will show knock sum values of 31-45 or so in cylinders 1+3 but 2+4 are 5 or less. When the car has just been started up in the morning it shows no knock in any cylinders. Is this abnormal and anything to worry about? Should I be using E-85 gas instead of 93-94? Thanks."
So I can't post a new thread yet but wanted to give my input.

It's 2017 and I just bought a 2006 WRX in excellent condition.

Previous owner installed a turbo back but nothing else.

Bought the AP, intake and flashed stage 1 -- awesome. Until I did a WOT in 4th at low RPM and experienced fuel cut. Scary.

I read posts and instructions for 2 days.

Seems my stage 1 was pushing 16-17 psi in 3,4 and possibly 5th.

Flashed stage 2 and now it's down to 14.5psi.

I hadn't flashed stage 2 because I contacted Cobb and asked if that map would work with a TurboXS and the person via email said "no".

But then read the details for stage 2 and all that's required is an aftermarket down pipe (3 in I believe)

Anyways. Now with the stage 2 map it seems like it's not over boosting anymore.

If I get P0244 again I'll follow up.

- Tony
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