[akotten]

So I've been looking through several Procede logs lately and I am beginning to think my boost takes longer than most to reach the target. Also, I can physically feel it lurch when it peaks around 16, drops and then holds the targeted valued (13.5). Is this normal?


- 2007 335xi, 64.5k miles, Procede, DCI, custom Magnaflow downpipe-back exhaust.

[ttbmer]

Whats ur altitude? It does look a little late at but it could be your location, is very normal for boost to taper Down closer to redline. My Turbos also take long to spool up but not as much as urs.

[akotten]

Originally Posted by ttbmer

Whats ur altitude? It does look a little late at but it could be your location, is very normal for boost to taper Down closer to redline. My Turbos also take long to spool up but not as much as urs.

Approximately 1,718ft. I realize that OEM turbos aren't capable of holding a lot of boost to redline, but my main concern is how slowly they spool and reach the 13.5psi.


This is that same run, imported into Virtual Dyno.

[Jeff@TopGearSolutions]

What is your waste gate compensation at and duty cycle

[akotten]

Originally Posted by Jeff@topgearsolutions

What is your waste gate compensation at and duty cycle

Waste gate is at 30%, due to notorious rattle. What duty cycle are you referring to?

[ttbmer]

Originally Posted by akotten

Waste gate is at 30%, due to notorious rattle. What duty cycle are you referring to?

That's y!! Raise it back to 90 and log again. Ive learn to live with the rattle.

[akotten]

Originally Posted by ttbmer

That's y!! Raise it back to 90 and log again. Ive learn to live with the rattle.

Is it really that? I thought it could be, but didn't think it could affect it THAT much. OK, ill go change it quick and go do a feel pulls Maybe I need to try and get a turbo replacement covered under my service contract I find it annoying to pull up to people in a newer BMW and have hear it raddle/tick. To them, something is probably broken.

[chrisw335i]

what jeff was referring to wastegate compensation is actually going to be "boost control gain" in your user adjustables. default is set to 45. if you check what your wastegate compensation is, which should be a unit or channel in your procede software interface in the upper right box. if you dont see wastegate compensation there, then you are going to add that channel then you can see what your compensation is

if your pegged out at the max of +5%, then you need to adjust boost control gain to 50 which should help your spool issue. if you still cant figure this all out with this walkthrough, i would highly advise calling shiv so he can walk you though it over the phone

what you are referring to as wastegate at 30 is wastegate position, not compensation just to clarify

[akotten]

Originally Posted by chrisw335i

what jeff was referring to wastegate compensation is actually going to be "boost control gain" in your user adjustables. default is set to 45. if you check what your wastegate compensation is, which should be a unit or channel in your procede software interface in the upper right box. if you dont see wastegate compensation there, then you are going to add that channel then you can see what your compensation is

if your pegged out at the max of +5%, then you need to adjust boost control gain to 50 which should help your spool issue. if you still cant figure this all out with this walkthrough, i would highly advise calling shiv so he can walk you though it over the phone

what you are referring to as wastegate at 30 is wastegate position, not compensation just to clarify

No I understand that exactly. I'm perfectly comfortable with the parameters within Procede. For the most part at least.

OK so Waste gate position was at 30% and Boost control gain at 45%.

[akotten]

Ok, so I changed the waste gate position to 90% and left everything else the same (boost control gain still 45%).

Here are the two logs I did.

[chrisw335i]

2 fixes...first one is to try the boost gain change to 50 and reset wastegate compensation in the command center..second is to lower boost slightly or aggression level to 1, as you are having to many timing drops.what octane are you running?

[akotten]

Originally Posted by chrisw335i

2 fixes...first one is to try the boost gain change to 50 and reset wastegate compensation in the command center..second is to lower boost slightly or aggression level to 1, as you are having to many timing drops.what octane are you running?

Ok, I'll go try that. All that I really have available is 91. 92 if I'm lucky, but 91 as of tonight.

[chrisw335i]

yeah thats your weakness...try changing it to 50 first and run it again a few times..give it a chance t re-adjust..that should help with boost response...far as the timing drops, it doesnt look healthy as the procede ign correction is already pulling a degree of timing and your still dropping out..if you were on 93 it probally wouldnt be so, so your forced to lower agressiveness a little bit. this is why the pwm meth system is so valuable, maybe something you should consider

[chrisw335i]

also far as spool up time and boost response, are you still running stock cats..if so, lose them for some catless pipes and that will make it a dramatic difference

[akotten]

Originally Posted by chrisw335i

yeah thats your weakness...try changing it to 50 first and run it again a few times..give it a chance t re-adjust..that should help with boost response...far as the timing drops, it doesnt look healthy as the procede ign correction is already pulling a degree of timing and your still dropping out..if you were on 93 it probally wouldnt be so, so your forced to lower agressiveness a little bit. this is why the pwm meth system is so valuable, maybe something you should consider

Well the only gas station that carries 93 in SD, quit carrying this summer So I have to search out 92 if I want that. And yes, a PWM kit is in my near future. I am saving any and all that I can so I can get one.

Originally Posted by chrisw335i

also far as spool up time and boost response, are you still running stock cats..if so, lose them for some catless pipes and that will make it a dramatic difference

I knew catless downpipes would decrease spool time...guess I just didn't factor that in. And even though I would LOVE a pair of downpipes, this is an xi, so DPs at the bottom of my list.


Anyways...here are two more pulls. I set the boost control gain to 50%, and the aggression level has been at 1 the entire time, however maybe it wasn't in effect since I didn't reset anything in the command center? So after I changed to 50%, I reset 12-1 in menu 3. Also, I only did two full 3rd gear pulls. I'm not sure if that was enough for it to adjust or not.

[chrisw335i]

it really looks like the timing drops are causing the issues..they are dropping left and right and can cause these issues with 91 octane and non fbo..only thing u can do for now is lower boost till you can add some mechanical help with dp's or meth. try to leave your max boost 15 if your at the default 16. that will help the timing

[akotten]

Originally Posted by chrisw335i

it really looks like the timing drops are causing the issues..they are dropping left and right and can cause these issues with 91 octane and non fbo..only thing u can do for now is lower boost till you can add some mechanical help with dp's or meth. try to leave your max boost 15 if your at the default 16. that will help the timing

Well its only sustaining 14psi at MOST, so I might as well drop it to 14.5, no?

[chrisw335i]

also the dme closed the throttle on you because of an overspike issue..incremntally lower boost until u see this stuff clear up

Originally Posted by akotten

Well the only gas station that carries 93 in SD, quit carrying this summer So I have to search out 92 if I want that. And yes, a PWM kit is in my near future. I am saving any and all that I can so I can get one.



I knew catless downpipes would decrease spool time...guess I just didn't factor that in. And even though I would LOVE a pair of downpipes, this is an xi, so DPs at the bottom of my list.


Anyways...here are two more pulls. I set the boost control gain to 50%, and the aggression level has been at 1 the entire time, however maybe it wasn't in effect since I didn't reset anything in the command center? So after I changed to 50%, I reset 12-1 in menu 3. Also, I only did two full 3rd gear pulls. I'm not sure if that was enough for it to adjust or not.

[chrisw335i]

and make sure you reset everything before your next run even autotuning and wastegate compensation..should be mode 4. command 5,6,7

[Jeff@TopGearSolutions]

Yes 30 will be slower and boost gain likely needs to be raised. The latter having more noticeable effect.

45 Default... 47 or 50 you can try.

If you look at waste gate compensation it can only increase 5% so if its pegged you use boost gain to increase.

[chrisw335i]

yeah i had him do that and his logs still look horrid...gave him a few more tips cause setting it to 50 he still has timing drops and throttle closure issues..running that high of boost on 91 octane with stock exhaust it no good

Originally Posted by Jeff@topgearsolutions

Yes 30 will be slower and boost gain likely needs to be raised. The latter having more noticeable effect.

45 Default... 47 or 50 you can try.

If you look at waste gate compensation it can only increase 5% so if its pegged you use boost gain to increase.

[akotten]

Originally Posted by chrisw335i

yeah i had him do that and his logs still look horrid...gave him a few more tips cause setting it to 50 he still has timing drops and throttle closure issues..running that high of boost on 91 octane with stock exhaust it no good

Yup, just realized I used the wrong menu and actually didn't reset 5,6, or 7 in menu 4. So just that and set max boost to 14.5, and about to go to a few pulls. Oh and thanks for the quick replies guys! incredible.