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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Boost Control...



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      11-26-2007, 04:48 PM   #199
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since your here Shivs can you tell us if you got the 50 units out today?? But you probably won't answer me because i am not Eugene
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      11-26-2007, 04:50 PM   #200
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Originally Posted by cn555ic View Post
since your here Shivs can you tell us if you got the 50 units out today?? But you probably won't answer me because i am not Eugene
I probably wont answer because you are being smug.

shiv

ps. ...and this thread is about boost control.
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      11-26-2007, 04:50 PM   #201
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Quote:
Originally Posted by shiv@vishnu View Post
I probably wont answer because you are being smug.

shiv
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      11-26-2007, 04:50 PM   #202
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thanks
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      11-26-2007, 04:53 PM   #203
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Its funny how your company gets abused as far as customer service and you have a customer asking a question thats been asked for every single week and there is no response...I try to be humorous and you get bent out of shape!! Who is the smug??
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      11-26-2007, 04:54 PM   #204
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Meanwhile all these SMUGS on the board are making you rich!!! That the sad part about that!!!!
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      11-26-2007, 04:55 PM   #205
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Originally Posted by kyleh4852 View Post
if you think thats funny, you are probably one of those people that already received their upgrade...so yeah its pretty funny
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      11-26-2007, 04:58 PM   #206
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Originally Posted by cn555ic View Post
if you think thats funny, you are probably one of those people that already received their upgrade...so yeah its pretty funny
Yep, received my V2 upgrade for my Crown Vic.....this thing hauls a** now....
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      11-26-2007, 05:00 PM   #207
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Originally Posted by cn555ic View Post
Meanwhile all these SMUGS on the board are making you rich!!! That the sad part about that!!!!
If you want to ruin a thread, don't hijack a technical one that a lot of people have spent a lot of time on. And if you want to ask a question, don't insult me while doing so. That's all.

Shiv
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      11-26-2007, 05:03 PM   #208
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Back on topic please...

Has anyone seen a boost spike on the order of 18-20psi during a dyno pull? I think so far everyone who has reported something out of the ordinary has been on the road... I'm curious because I'm going to get V2 dynoed this week on my otherwise stock 335i using the default map and roughly 95 octane (USA) in the tank.
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      11-26-2007, 05:16 PM   #209
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Quote:
Originally Posted by shiv@vishnu View Post
If you want to ruin a thread, don't hijack a technical one that a lot of people have spent a lot of time on. And if you want to ask a question, don't insult me while doing so. That's all.

Shiv
+1

and I'm waiting for my V2 like a lot of people, but personally I like the fact that the members of this board are making an educated attempt at helping Shiv fix all of the little V2 issues (if they are even V2 related) and even make some improvements it seems. Please do not ruin important posts like these....thank you.

back on topic now
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      11-26-2007, 05:44 PM   #210
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Can someone summarize where we're at? My head is spinning...

It sounds like the high boost at 3-4K is due to a cam/timing phase shift. Is that right?

It sounds like the boost spikes when letting off gas abruptly are normal, and related to location of measurement.

It sounds like there are still times where we are seeing higher than desired boost levels, and we're playing with lowered settings and overboost turned off.

Is that where we are? Scalbert? Eugen?
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      11-26-2007, 06:03 PM   #211
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Quote:
Originally Posted by Tuned335i View Post
Has anyone seen a boost spike on the order of 18-20psi during a dyno pull? I think so far everyone who has reported something out of the ordinary has been on the road... I'm curious because I'm going to get V2 dynoed this week on my otherwise stock 335i using the default map and roughly 95 octane (USA) in the tank.
I seriously doubt you will see a spike on a dyno. You normally start at about 1500 - 2000 RPM for the pull and in that range, the boost builds slower and is handled accordingly.
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      11-26-2007, 06:14 PM   #212
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Quote:
Originally Posted by DrDomer View Post
Can someone summarize where we're at? My head is spinning...

It sounds like the high boost at 3-4K is due to a cam/timing phase shift. Is that right?

It sounds like the boost spikes when letting off gas abruptly are normal, and related to location of measurement.

It sounds like there are still times where we are seeing higher than desired boost levels, and we're playing with lowered settings and overboost turned off.

Is that where we are? Scalbert? Eugen?
Pretty much where it is with an exception. The spike in the manifold readings between 3k and 4k makes sense. Something has to be occuring to only see this spike there and the only events are the cam phasing; possibly minimal or no overlap for a short period.

The off throttle spike is due to the throttle closing slightly quicker than the bypass valves opening and bleeding off the excess.

The lowered settings have to do with minimizing the spike; which it did. We are bringing them up slowly to get the steady state values in line with where they were and see if/where the spikes go to with the new boost control tuning values. I am not aware, excluding one, of continuously sustained higher boost. If so, the user adjustments can be made.

In all, the spike matter is being handled and the source seems to be known. IMO, I would have always expected a spike of some sort; nature of the beast or so to speak. Now that we know the specifics to generate it (specifically the RPM range) and source have been narrowed down, the program is being adjusted to compensate.
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      11-26-2007, 06:19 PM   #213
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Originally Posted by lumi335 View Post
thats sad. worst customer service i have seen in a while. HERES your customer!
I would say that maybe it's a New York thing. But having grown up there, I know that's not true. Regardless of where i live, if i was intentionally being rude to someone, I wouldn't expect an answer. Especially if I posed it in an inappropriate thread.

Quote:
on topic, from last i was reading, the bypass valve does only open when the throttle is closed.
maybe it time to update these diverter valves
No it's not. That is the way bypass valves work. They actuate by using the pressure differential between the intake manifold and the induction pipe. With the throttle open (same pressure in both places), the stay closed. When the throttle is closed (you get pressure in the pipe and vacuum in the manifold). Pressure on the bottom of the diaphram pushing open and vacuum on the top pulling open. If it were to just open with overboost pressure, it would have a cracking pressure well below the desired opening pressure. These devices are called pop-off valves and are use to limit boost pressures in racing (to combat cheating).

-shiv
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      11-26-2007, 06:20 PM   #214
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sorry about hijacking this thread...i decided to post in a thread corresponding to the shipments of V2 upgrades...I see you haven't responded to those threads asking questions of that nature, ...Its been about half hour and still no response...Thanks for the quality Customer service again
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      11-26-2007, 06:22 PM   #215
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yeah we people in New York are all arrogant A-holes...But thats not the case, were all spending money customers of yours thanks once again for the great customer service...
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      11-26-2007, 06:25 PM   #216
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anyway i am outta here tonight....but like i said thank you for making me feel great about my purchase from your company....and yeah yeah i know i can cancel my order, but its too late for that...but again thanks
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      11-26-2007, 06:31 PM   #217
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Shiv

About the boost error Eugen posted today. Is this error flagged based on some pressure delta or by a pressure limit.


Orb
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      11-26-2007, 06:32 PM   #218
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Quote:
Originally Posted by cn555ic View Post
anyway i am outta here tonight....but like i said thank you for making me feel great about my purchase from your company....and yeah yeah i know i can cancel my order, but its too late for that...but again thanks
you do realize your not on the phone with someone right?



and by the way....nice color choice exterior/interior on the e93....looks good
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      11-26-2007, 06:34 PM   #219
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Originally Posted by Orb View Post
Shiv

About the boost error Eugen posted today. Is this error flagged based on some pressure delta or by a pressure limit.


Orb
Pretty sure it's a pressure delta because i have reproduced it at very low absolute boost pressures but with electronically augmenting the spike signal.

shiv
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      11-26-2007, 08:56 PM   #220
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Be glad you did not have constant 20psi boost, well you know my story.

Quote:
Originally Posted by scalbert View Post
Yes, but nothing conclusive as the logs do not show the spikes. The first few times I got on it in the below iot did spike but the PROcede does not show this.

I'm starting to be VERY uncomfortable with the software, you make at least 4 people that have different readings on their gauge than the software at times.

Quote:
Originally Posted by Orb View Post
O-cha had the same problem as mentioned here so that makes three. Shiv looked into this but couldn't determine the cause.
"couldn't determine" would be wholly inaccurate, but I'm going to wait a few days before I open up that can of worms.


Quote:
Originally Posted by scalbert View Post
It is not unheard of to have to make a turn or two on the wastegate shaft to get a system to respond the same as others. Not all turbos leave the factory exactly the same. Dunno, but I will certain keep watching it...
More info please!

Quote:
Originally Posted by Terry335 View Post
It's a vacuum based system and the wastegates default open (no boost). The solenoids are 0-12v, ~1a at full load. 0v is fully open, 12v is fully closed.
Good to know, so voltage regulates the solenoids/wastegates and 12v gets you closed wastegates (max boost) and 0v gets you open wastegates (minimum boost)? Are those the white and grey/white wires? Can you think of any easy way short of connecting my multimeter with a big long wire to measure the voltage being output? I would be really interested in finding out if 12v was being sent to the solenoids even after my car starts hitting 20psi. because thats what seems like is happening.

Quote:
Originally Posted by scalbert View Post
Technically, the stock DME is only reading what the PROcede transmits to it. Only the PROcede truly reads the TMAP pressure signal.
I wonder if the procede "accidentally" sent that the car was under low boost making the ECU read low boost and full throttle if the ECU would then send voltage to close the wastegates resulting in overboost.
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