i need someone to help me. my car is overboosting in 5th and 6th gear only,and i am using avcr to control my boost. the maual from apexi is kinda hard to understand. my car has the 30r with all the supporting mods,and etc. you know,external gate,cobb ap? thanks. :)

What is your Start Duty setting for 5th? How much is the overboost?

Tell you what - read this thread and make sure your base settings are good, then adjust your Start Duty settings: http://forums.nasioc.com/forums/showthread.php?t=984407&page=1&pp=25

how do i know what percentage it is at? all i see is 0% in all gears. it is boosting all the way to 1.76 instead of 1.40 on my A setting and 1.65 on my B setting. this is only in 5th and 6th gear. the lower gears are overboosting a lil bit,but it's not that bad. i'm gonna try to read the link u gave me.

the avcr is a little hard to understand at first, but once you get it, it'll be your best freind. i can't add anything that hasn't already been said though, sorry.

so since they are all 0%, all gears get the same dutycycle.

In MY experience with my 3" green, my Start Duty is set:

1: +50
2: +15
3: +5
4: 0
5: -8

I can actually hit full boost in 1st (for like .03 seconds ;) )

That keeps the boost actually lower than target in 5th and 6th. If I go to the track, I guess I might make 5th -4 or something. But in the meantime, I actually prefer having the boost a little lower in 5th and 6th (1.58-1.6 instead of 1.70 in all other gears) on the street. full boost in 5th and 6th are exceptionally stressfull compared to 1-4.
I've often thought that an easy way to blow the engine would be to find a long uphill and hit 24+psi in 6th with a couple passengers.

In MY experience with my 3" green, my Start Duty is set:

1: +50...

Wow, that's some addition. If your D/C is, say, baselined at @ 60% to begin with, you realize that anything above +25 is not being used since the AVCR maxes out at 85% total D/C (baseline D/C plus Start D/C)? Or do you have some humongous WG spring in that puppy that allows you to have a baseline D/C @ 30%?

ok,i am getting pretty good with this. i did some road tuning in the lower gears and high gears. this is what came out of it. start duty 1 and 2 are at 0%,3 is at -3%,4 is at -2%,and 5 is at -15%. i am not overboosting like crazy anymore. thanks for all your help,guys.

ok,i am getting pretty good with this. i did some road tuning in the lower gears and high gears. this is what came out of it. start duty 1 and 2 are at 0%,3 is at -3%,4 is at -2%,and 5 is at -15%. i am not overboosting like crazy anymore. thanks for all your help,guys.
Good job. It sounds like you have it all setup manually with no learning on - if that's the case just remember to be careful when the weather cools back down otherwise it'll overboost on you.

That is one of the big advantages to the "learn" feature - it will continually adjust the baseline D/C map for changes in density altitude.

how do u do the learn thing? it's weird,how my first gear runs better at 0 than at any+ numbers.oh yeah,my d/c is only 65%.

they put the manual online if you don't have it. i use the learn function. hasn't let me down since i got it in 2004

It's weird,how my first gear runs better at 0 than at any+ numbers.
I found the same to be true with my car also, although I can't explain just why. I don't think I have ever hit full boost in first or second gear, but I think that is normal. Anyone know what max psi is achievable in these lower gears?

how do u do the learn thing?
Read the thread I posted at the top.

I don't think I have ever hit full boost in first or second gear, but I think that is normal...
It is. There usually isn't enough load (or time) to spin it up before you have to shift. I can get real close in 2nd, but not quite, even with the Start Duty maxed out; in first, frankly, I have trouble with dry traction as it is. If I nail it in first, I have to shift it more or less immediately.

From third on, however, no problemo. It flies. :)

actually,all the gears are still set on learn. they all have o's with no x's. i think,that's what you are talking about.

actually,all the gears are still set on learn. they all have o's with no x's. i think,that's what you are talking about.

With manual start duty cycles and learning enabled for all gears the AVCR is going to be fighting itself. Turn off all but 3rd (4th for 6speeds); set the rest at X.

This has worked for me on numerous cars.

I have learn set only on 3rd and 4th gear. As things settle, I'll turn off 3rd.

I put 1st gear to +50 just because I know it will always do everythign it can. Im sure its well above "maxed out".

With the 3" green, my boost guage indicates full boost in 1st, def. in 2nd, and of course in 3+.

One thing I have specifically turned off, that I have *always* had issues with, is Feedback. I can never get it just right. It always either overboosts (not cool when normal boost is 1.70), or it lags. I know that feedback would work well in weather changes if it was perfectly set up, but with the EWG, I am pretty steady anyways.

So before you get too far trying to move thing around, be sure your feedback is off (X I think) in all gears.

The issue with "learn" is this: every gear that you have set a S/D number other than "0", it won't learn; it is not clear which cancels out which, but the two in combination do not work. That's why most tuners that are AVCR savvy will set only a single gear (either 3rd OR 4th) to learn, and set the corresponding Start Duty to "0" for that gear. That gear then becomes the "master" gear for self-adjusting the baseline D/C map, and you can then adjust the other gears independently with the S/D settings.

The FB speed modifies the sampling rate for either closing or opening the WG. For the really stable EWG's like TIALS, a lot of tuners leave it at more conservative numbers (like 3) across the board. The higher you go, the less conservative. By turing it to "X", I have no idea what the default is - that is unknown territory for me.

The AVCR reminds me a little of Photoshop - there are probably 20 different ways of accomplishing the same thing and no one, no one, knows them all!

The issue with "learn" is this: every gear that you have set a S/D number other than "0", it won't learn; it is not clear which cancels out which, but the two in combination do not work. That's why most tuners that are AVCR savvy will set only a single gear (either 3rd OR 4th) to learn, and set the corresponding Start Duty to "0" for that gear. That gear then becomes the "master" gear for self-adjusting the baseline D/C map, and you can then adjust the other gears independently with the S/D settings.

The FB speed modifies the sampling rate for either closing or opening the WG. For the really stable EWG's like TIALS, a lot of tuners leave it at more conservative numbers (like 3) across the board. The higher you go, the less conservative. By turing it to "X", I have no idea what the default is - that is unknown territory for me.

The AVCR reminds me a little of Photoshop - there are probably 20 different ways of accomplishing the same thing and no one, no one, knows them all!

well, I can understand why having 2 gears with learning on is a no-no. But one of the VERY first settings I get happy with is my Start Duty... so Im really feeling pretty good that 3rd and 4th learning wont be chasing it's own tail. And if it is... it should be doing so in a small enough way that Im actually ok with it. I don't find that learning actually moves to quickly. It should be slow enough to avoid over-reacting to exhaust warm-up, cold mornings, etc. And so if its that slow, Im not *too* worried about it.

As for the FB speed... I just couldnt get mine to provide much added value. I tried various speeds, only in 4th, and never got it to give me any added spool up. On top of that, Tim hasnt done any dyno-tuning for me, so my AFRs are bumping my boost around a little. THere is no FB rate that seems to iron me out without overboosting, so for the most part, Ive given up.

What the AVCR shows based on it's boost measurement does show that I need a quicker and more accurate boost guage though. This over-priced Autometer NEXXUS setup may look nice, but its so Beta that it should have been an alpha/barely gold-code/free rather than the $$$$ it was.

Thats another good point... watch the AVCR if you can rather than your boost guage if you think behaviour is a little unstable. The culprit could easily be your guage.

ok,there's alot of good info here. i just can't seem to get 1st gear to boost. i have it on 43% and the car ain't really moving when i am stepping on it. 1st gear might hit 50% tomorrow,cause i am done for today.

ok,there's alot of good info here. i just can't seem to get 1st gear to boost. i have it on 43% and the car ain't really moving when i am stepping on it. 1st gear might hit 50% tomorrow,cause i am done for today.

That sounds more like a tuning issue than AVCR related. Essentially if you are running 60% DC across the board, +43 is the same as +50.

on the learn mode 1st gear was boosting. now that i have it off,1st is boosting like .28 to .38. it's not even close to the target boost. the other gears are good to go so far.

...But one of the VERY first settings I get happy with is my Start Duty...
Interesting, and this is the way PDX set it up for you? How can you start there when it needs the D/C map set up first so it has something to apply the S/D percentage gain to? Or am I missing that step in your explanation?

And, yeah, it is not a really quick learner, though it does seem to lower the D/C map a lot faster than it will raise it. Good thing too, especially when you take it out on a 20 degree morning!

on the learn mode 1st gear was boosting. now that i have it off,1st is boosting like .28 to .38. it's not even close to the target boost. the other gears are good to go so far.
You've got something setup wrong. How many gears do you have set to "learn" and did you set up the gears when you initialized it? BTW, I agree totally with Rainmaker - use the AVCR to track boost, not your guage.

You've got something setup wrong. How many gears do you have set to "learn" and did you set up the gears when you initialized it? BTW, I agree totally with Rainmaker - use the AVCR to track boost, not your guage.
Do you happen to know the gear ratios for a 6spd STi, so I can double check mine.

Interesting, and this is the way PDX set it up for you? How can you start there when it needs the D/C map set up first so it has something to apply the S/D percentage gain to? Or am I missing that step in your explanation?

And, yeah, it is not a really quick learner, though it does seem to lower the D/C map a lot faster than it will raise it. Good thing too, especially when you take it out on a 20 degree morning!


You've got something setup wrong. How many gears do you have set to "learn" and did you set up the gears when you initialized it? BTW, I agree totally with Rainmaker - use the AVCR to track boost, not your guage.
the tuner did all of the initalization on the avcr. i only have it on 4th as the learn gear. i went back and put the learn gear back in 1st and leave the s/d at 0 as well. the car is now boosting at a whopping 6psi instead of 2 earlier. it seems to be running better in learn gear. now,i have 1st and 4th as learn gear. what do u guys think is wrong with my first gear?

Do you happen to know the gear ratios for a 6spd STi, so I can double check mine.
I can't remember my numbers right off hand and the car's in the shop for a heart transplant until the end of next week. If you have any doubts about it's being right it only takes about one minute to set the gear speeds - just take it to a steady 3K in first on level ground, push the button, shift and do it for the next four gears too. Frankly, you can do it faster than entering in someone else's numbers - more fun too. :)

I can't remember my numbers right off hand and the car's in the shop for a heart transplant until the end of next week. If you have any doubts about it's being right it only takes about one minute to set the gear speeds - just take it to a steady 3K in first on level ground, push the button, shift and do it for the next four gears too. Frankly, you can do it faster than entering in someone else's numbers - more fun too. :)
Ok, just wanted to double check it. I'll write them down, and see what it learns to compare :D.

the car is now boosting at a whopping 6psi instead of 2 earlier.
Whoa. It only does this in 1st, and makes target (or close to it) in all other gears? Some setting is definitely fubar'd.

Three choices: post every setting you have in that thing and we can all knock our heads together to try to diagnose this; start over and reset everything; or, call your tuner and tell him there's a problem and ask him to fix it or replace the unit.

I've seen of this type of problem before - in the other example the guy started from scratch, rebuilt the program (it's not that difficult) and his problem simply dissappeared - he doesn't know why, and neither do I. (Then again, these things are not perfect - they do sometimes fail.)

all the other gears are doing great. i'll have to call my tuner tomorrow. it sucks that he is 7 hrs away. let me go to my car and write everything down. brb.

Wait a second - your comment about 2 psi just hit me. What wastegate spring are you using? It sounds to me like you aren't even making spring boost. I have a GT30R with a very light 0.6 bar EWG spring and I make 9 psi with the AVCR turned off.

i have no idea about the spring. let me pm him.

here are the settings for my 91 octane.

boost/duty
bst:1.40kg/cm
6500rpm duty 65%
6500 rpm bst 1.40


Ne point
N1:3000rpm
2: 3500
3
4
5
6
7
8: 6500 rpm

F/B
1st=3 all of them are 3

learning
1st is learn
2nd not learn
3rd not learn
4th is learn
5th is not

start duty
1st:0 2nd:+ 4% 3rd: -5% 4th:0 5th: -23%

car select
cycl=4 spd=4

sensor selection
1=relative 1
2=relative 2
3=absolute1
4=absolute 2

gear judge
1st=120
2nd=075
3rd=050
4th=035
5th=025 n/s 255

initalize
initial all? the no was highlighted.

do i have to initalize everytime i change something in the s/d?
am i missing anything?

personal opinon... turn off the feedback, turn off the learning in 1st gear... then adjust the Start Duty for 1st to see if you can make boost. If you cant make boost with learning off and feedback off, then you have a non-AVCR issue (boost leak?)

I Don't remember all the settings since I soldm ine quite a while back, but I found this site useful when getting it dialed in.

http://www.fd3s.net/AVC-R_install.html

i did that and still no boost. how come i am gettin boost in higher gears? so,it must be a leak somewhere?

My *guess* would be a leak or a poor tune.

or i might be returning the car back to stock. this really sucks,man.

here are the settings for my 91 octane.

boost/duty
bst:1.40kg/cm
6500rpm duty 65%
6500 rpm bst 1.40


OK, give me the specific boost/rpm #'s. You should be able to hit 1.40kg/cm in 4th gear by 3500, maybe even as low as 3K. That's not a whole lot of boost for a true GT30R. Then reset the gear judges #'s: first looks way off - there shouldn't be that much of a jump between 1st and 2nd and some of the other number differentials look off too. I explained how to do this above.

Here's an easy way to figure out your spring pressure: turn the AVCR to OFF, then monitor max boost and do a 3rd or 4th gear pull. What it hits is your spring pressure and it should remain exactly the same in all gears. One last question for now: what EWG are you using?

tial 38mm and i'll do all of that tomorrow. how do i turn the avcr off? is there a button? or do u mean i have to turn the car off? the boost is only for 91octane. i have the higher boost on my 97octane and that's at 1.65. i am overboosting in 4th on the learn gear. all the other gears are learn,except 5th now. thanks for your help,kirk.

Setting A-B-OFF.

...i am overboosting in 4th on the learn gear. all the other gears are learn,except 5th now...

When you post up that Boost/Rpm map, do the same for your Duty Cycle/RPM map too. Run the Gear judge again, and we'll take it from there.

FWIW, I agree with Rainmaker that you might have too much going on with the learn feature, Start Duty settings, and F/B - all you really need is one gear to allow the AVCR to modify the Duty Cycle map to hit target boost/rpm and then you should adjust the other gears manually via Start Duty. Even so, however, you still will probably not hit full target boost in 1st; but, hitting only only 6 psi is with learing ON and only 2 psi with it OFF and the Start Duty turned way up is just bizarre.

This thing is a fairly complex little computer - as with any of them, sometimes when you get strange behavior the quickest [and only] solution is to simply wipe the slate clean and start over. Then, if that doesn't work, you know it's either a faulty AVCR unit or the install was incorrectly performed.

ok, i turned the avcr off and i still ain't boosting in first or 2nd. i didn't even try 3rd,cause i don't wanna blow anything up. i also went woot in 4th gear. the boost went all the way up to 1.53kg/cm. all the other gears were off. that's with the duty cycle all the way down to 59%. i'll try 3rd gear with the avcr off lata.

ok, i turned the avcr off and i still ain't boosting in first or 2nd. i didn't even try 3rd,cause i don't wanna blow anything up.
It can only boost to the EWG spring pressure - you can't hurt anything with it off. What kg/cm^ did it show?

i also went woot in 4th gear. the boost went all the way up to 1.53kg/cm. all the other gears were off. that's with the duty cycle all the way down to 59%.
It just suddenly overboosted? Did you turn it back on to the right map (A or B)?

Either you have the weirdest boost leak I've ever heard of (it only happens in 1st gear), or your AVCR settings are totally wacked. Look, read the thread I posted, then read the manual, then read them both again. Double check all your settings. Once you've done that, we'll take this up again next week.

thanks,this **** is just weird.
it was in negative km/cg.

kg/cm^2 works about to 14.22/14.7 of a bar. So about .96, IIRC... Get confirmation of that though...

ok,i went woot in 3rd gear couple of times witht the avcr off. i got a max kg/cm of .78. i also raise the duty cycle to 71% . first was still slow,but i got 2nd gear up to .86. since,i raised the duty cycle up to 71%. i know my 4th gear will overboost even more. what do u guys think.

So first off, in my opinion, lets go through a AVCR setup excercise. If you cant get past a certain step, dont proceed. Let us or a tuner who knows AVC-Rs proceed.

1. Turn off Feedback in all gears
2. Turn every start duty to 0 except 5th, which you should make -20%
3. Turn off learning in all gears
4. Go to Boost/Duty. Choose your boost. Lets say 1.40. Set it that way.
5. Choose your dutycycle and set it statically on the main Boost/Duty screen. Try %50 to start.
6. Make sure "Scramble" is turned off.
7. Go find a *really* long stretch with no cars. Drive at 2000 rpm in 4th. Go wide open throttle all the way to redline. Observe that nowhere does it goe above 1.40. You can do this using the "Monitor" function with boost and whatever. It will display the peak. If it does go over 1.40, lower the Boost/Duty by 5% and try again, etc until it is below 1.40 everywhere. At the top of 4th, you may see slightly higher boost with a small WG. You might not.
8. Go into the DutyCycle at specific RPM screen by pushing "Select" while you are on DutyCycle in Boost/Duty. Raise the dutycycle at 4000 rpm 2% and take a run. Watch the boost and look at the peak boost in the monitor. Continue 2 or 3% at a time until you reach target boost at 4000 rpm. Start raising 4500 rpm dutycycle a little at a time until the boost stays where you want it until past 5000 rpm. Do 5000 the, 5500, 6000, and then MY suggestion is to keep the 6000 number in 6500 too.
9. Go back and raise 3500 until it makes the boost go over your ideal boost the same way you did 4000-6500. I would personally suggest making 2500 and 3000 the same as what you just worked out for 3500.
10. Take a *very* carefull WOT run in 5th from 1500 rpm up to 4000-4500 rpm and make sure that the boost looks OK. *either* adjust the 2500 rpm dutycycle or the 5th gear Start duty depending on when you think the boost gets too high or not high enough. If its low or high around 2500-3000, raise or lower the 2500 DC. If its high or low after that, go to the "start duty" for 5th gear and raise or lower that.
11. Turn learning on in 4th gear only.
12. Try different numbers in the start duty for gears 1-3. I put what I ended up with before. Your experience will likely vary.

Enjoy.

And yeah... I cartinaly go in every couple of weeks and mess with the DC at a certain RPM... its fun to mess with and constantly re-tune a little.

-Chris

thanks,i will try that tomorrow.

So first off, in my opinion, lets go through a AVCR setup excercise. If you cant get past a certain step, dont proceed. Let us or a tuner who knows AVC-Rs proceed.

1. Turn off Feedback in all gears
2. Turn every start duty to 0 except 5th, which you should make -20%
3. Turn off learning in all gears
4. Go to Boost/Duty. Choose your boost. Lets say 1.40. Set it that way.
5. Choose your dutycycle and set it statically on the main Boost/Duty screen. Try %50 to start.
6. Make sure "Scramble" is turned off.
7. Go find a *really* long stretch with no cars. Drive at 2000 rpm in 4th. Go wide open throttle all the way to redline. Observe that nowhere does it goe above 1.40. You can do this using the "Monitor" function with boost and whatever. It will display the peak. If it does go over 1.40, lower the Boost/Duty by 5% and try again, etc until it is below 1.40 everywhere. At the top of 4th, you may see slightly higher boost with a small WG. You might not.
8. Go into the DutyCycle at specific RPM screen by pushing "Select" while you are on DutyCycle in Boost/Duty. Raise the dutycycle at 4000 rpm 2% and take a run. Watch the boost and look at the peak boost in the monitor. Continue 2 or 3% at a time until you reach target boost at 4000 rpm. Start raising 4500 rpm dutycycle a little at a time until the boost stays where you want it until past 5000 rpm. Do 5000 the, 5500, 6000, and then MY suggestion is to keep the 6000 number in 6500 too.
9. Go back and raise 3500 until it makes the boost go over your ideal boost the same way you did 4000-6500. I would personally suggest making 2500 and 3000 the same as what you just worked out for 3500.
10. Take a *very* carefull WOT run in 5th from 1500 rpm up to 4000-4500 rpm and make sure that the boost looks OK. *either* adjust the 2500 rpm dutycycle or the 5th gear Start duty depending on when you think the boost gets too high or not high enough. If its low or high around 2500-3000, raise or lower the 2500 DC. If its high or low after that, go to the "start duty" for 5th gear and raise or lower that.
11. Turn learning on in 4th gear only.
12. Try different numbers in the start duty for gears 1-3. I put what I ended up with before. Your experience will likely vary.

Enjoy.

And yeah... I cartinaly go in every couple of weeks and mess with the DC at a certain RPM... its fun to mess with and constantly re-tune a little.

-Chris

Perfect Explaination of AVCR setup! That's what I do and the correct method. :cool:

Great explanation of a manual Duty cycle set up. It's either that or you can let it learn it's own Duty Cycle map, but, you gotta start somewhere. If you want it to learn and you want the Start Duty to work properly, however, you must have the gear judge set properly.

At this point, though, I'm not sure we can help you since you don't seem to have any grasp of the concepts or the terms - you're bouncing all over the place. My advice is to take this weekend and perform a systematic redo of the settings - or just take it to the tuner. Running out to your car, changing a single setting (and then deciding to change others), and then running back here to tell us "it is doing the same thing, but here's some new weird stuff too" - well, it's getting a little old.

Do it right, or don't mess with it. You can follow Rainmaker's plan, or the traditional AVCR "learn" plan (they both work), and you will end up with a safe and functioning boost program. OTOH, if you just start throwing in data points without knowing what you're doing, you risk grenading your motor.

notice the start duty learn gear is from 1 to 5
means 1 ,2, 3, 4 and 5.
If a car is a 6 speed, how to set the learn gear for 6th gear?

Thks

You don't - any setting for 5th is also the setting used for 6th.

you mean 5th and 6th gear share the same setting for start duty learn gear?

1 +10 (for 1st gear)
2 + 7 (for 2nd gear)
3 0 (for 3rd gear)
4 -7 (for 4th gear)
5 10 (for 5th and 6th gear)

5 10 (for 5th and 6th gear)

I hope you mean -10 for 5th and 6th (yes they share the start duty, as Flycaster says). +10 could well make the motor go pop.

I hope you mean -10 for 5th and 6th...
I second that one - you really need to back 5/6 down otherwise you're going to overshoot your target boost by a bunch. Turbos spool much sooner and much quicker in the taller gears due to the increased loads and exhaust pressure.

Be careful.

good luck Bo. The AVCR is pretty confusing.

ijust set mine at 1.2 with a dc of like 55%.....perfect in all gears when used with the utec never overboosted

If all you're going to run is @ 17 psi, why use an AVCR at all?

It doesnt matter how much or how little boost you are going to run, the AVCR is the best way to control boost. It can help you spool up faster in 1st than the stock solenoid and keep you from creeping in 5th and 6th.

Hooray for RPM and gear dependant boost!!!

It doesnt matter how much or how little boost you are going to run, the AVCR is the best way to control boost. It can help you spool up faster in 1st than the stock solenoid and keep you from creeping in 5th and 6th.
Personally, I think the AVCR is a total waste of money unless you intend to run more than the ECU map will allow (22+ psi) and/or use an EWG. Then it, or another controller becomes a must. I've ridden in a 20G tuned to 20 psi before and after an AVCR install and I didn't feel or see any difference whatsoever; to be fair, however, this was with an internal wastegate. The owner kept insisting that it was "much quicker", so I obliged and said, "Sure is." (I'm not a party pooper.) :lol:

Also, unless I'm mistaken, true "boost creep" is a mechanical issue associated with certain internal wastegate/downpipe systems and cannot be mitigated by a change in boost controller; I've never heard of boost creep happening in any EWG setup. There was a guy here who not too long ago tried to use a stand alone contoller to control his VF-39 creep problem and it didn't seem to help him at all; he, like most guys, ended up porting the IG.

I think if you tried to use the AVCR gear settings to "control" boost creep, you'd simply end up starting the creep at a lower target number which would kind of be the worst of both worlds.

Hey, I have an interesting question for the gurus. I was sitting in my car tonight eating a burger with the ignition and radio turned on, car off. I happened to glance over at my AVCR and it read negative 30mmhg. I just called the local Flight Station, and sure enough, our local atmospheric pressure is just about 28.7inhg (big high pressure and quite cool). Is this thing calibrated to standard sea-level (I live at @4K elevation)? And, if so, how does this affect the engine-on readings, if at all?

If it actually adjusts the boost pressures on the fly according to the datum point, it'd sure be nice to know. That would be quite cool in my case, but might not be for others.

you guys are giving me a headache with this avcr stuff.lol. it's ok,cause gruppes- will take care of it. :banana:

i need to bump this
i just installed an avcr, got most of it working right, still need to work on setting the target boost. but my problem is i notice the avcr is not reading the throttle. i used this to connect the wires... http://www.pdxtuning.com/images/how_to/AVCR%20STi.JPG ... i connected the grey wire to pin 17. is that the right pin?
i have a 04 sti

I connected it to that pin, and it worked.

my car is not hitting target boost now. it was fixed by gruppe-s and ran great for 3 weeks. i was going to take my car to the track and took out my 100 something lbs subs and and it's now not boosting. the highest boost i hit so far is at .51 kg/cm. could it be a bad avcr or wastegate. i turned the avcr off and was in the negative boost or vacum.

NO AVCR FOR YOU.

/soup nazi imitation

I did a number of tests with regard to spool up. I connected my wastegate direct to turbo outlet did a few runs in 3rd. then connected my avcr and did the same. Same bit of road, same gear, slowed down to 1500rpm in 3rd and floored it till 7k. Got 2 or 3 datalogs of each.
Carefully compared the two and the spool is the same. AVCR still is useful for adjusting boost.
That is with GT30 and EWG.

Carefully compared the two and the spool is the same.
Of course they are; when the wastegate is shut, spool is spool. The AVCR has zero impact on the mechanics of the turbo, rather it just controls the wastegate, period. The wastegate is either open or shut: all the AVCR does is merely tell it when (or how often) to switch between the two.

I've just read through this thread and this has been excellent information on the AVCR, so thanks to the very informative posts.

Quick question, in learn mode can the AVCR drop the duty you've designated in the boost/duty cycle setting?

For example, if you've set say 60% duty and boost setting 1.10kg/cm and set start/duty to 0 and learn gears 'O' will the AVCR actually go below the 60% duty setting?

For example, if you've set say 60% duty and boost setting 1.10kg/cm and set start/duty to 0 and learn gears 'O' will the AVCR actually go below the 60% duty setting?
If it detects overboost at a certain rpm, yes. Likewise, if it detects underboost at certain rpms, it will adjust the D/C map up. Once it starts learning mode you'll see "***" take the place of "1.10" in the D/C menu.

Thanks again.

Another quick question :)

Does altering the Start Duty off the -+0% cancel out Learning for that gear? I remember seeing some conflicting information about it in another post.

bumpin up my old thread,cause i found the cure...

finally, i found the answer to my non boosting problem. my friend and i checked the wastegate and it was stuck open by some metal debris. the debris were either from the uppipe or dp welds. i guess,the first 2 times the boost just blew the debris out the back end of the exhaust canister and on to the street. that would explain why my car would sometime boost and than stop boosting. i have pics and will post it asap!!! It's been an ongoing thing for almost a year.

Pics, one in a million chances of this happening :)

http://i146.photobucket.com/albums/r263/wsiliezar/Forester/P1010003.jpg
http://i146.photobucket.com/albums/r263/wsiliezar/Forester/P1010002.jpg
http://i146.photobucket.com/albums/r263/wsiliezar/Forester/P1010001.jpg
http://i146.photobucket.com/albums/r263/wsiliezar/Forester/P1010004.jpg
http://i146.photobucket.com/albums/r263/wsiliezar/Forester/P1010005.jpg
http://i146.photobucket.com/albums/r263/wsiliezar/Forester/P1010007.jpg

boy that has to feel like droppin a huge duece off