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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 > PROcede v3.1 preview



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      08-21-2008, 06:48 PM   #89
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Quote:
Originally Posted by scalbert View Post
As you very well know, direct knock values are not available. But derived values, educated guess, can be made. In addition, if working within the confines of the DME's safegaurds, safe adjustments can be made.
I am not sure how you could guess knock values, they are not really predictable. You can only adjust boost, timing retard, and air fuel ratios to try to avoid them based on other sensors, which is what I thought the V3 was supposed to do. I don't see why now these values need to be changed by the user. Let the box predict them.
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      08-21-2008, 06:50 PM   #90
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Quote:
Originally Posted by aab3218 View Post
I am not sure how you could guess knock values, they are not really predictable. You can only adjust boost, timing retard, and air fuel ratios to try to avoid them based on other sensors, which is what I thought the V3 was supposed to do. I don't see why now these values need to be changed by the user. Let the box predict them.
If you are not sure then you need to refrain from the topic any further. It is fairly simple to do and has been done for many years.
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      08-21-2008, 06:55 PM   #91
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Originally Posted by scalbert View Post


You really beleive there is a single value for the parameters? There are many combinations depending on the conditions, etc. You could run more fuel and less retard or less fuel and more retard. Both could make similar numbers...

You are really digging here. Cars and fuels are different. Having minor adjustments will allow finer tailoring. In addition, many of the upcoming adjustments are not performance related but more to allow the user to get the vehicle to respond the way they want.
The factory ECU already does these fine trimmings, there should be no need for minor adjustments. If we assume there is a need for them, the box should be smart enough to predict which is the best combination. If octane is higher it should know to add more timing and less fuel, if octane is lower it should know to remove timing and add fuel. This is how the factory ECU works and would be keeping things going in the right direction.

Making adjustments to none tuning related things or the general boost curve seems appropriate. I thought this was already a feature.
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      08-21-2008, 06:56 PM   #92
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Quote:
Originally Posted by aab3218 View Post
The factory ECU already does these fine trimmings, there should be no need for minor adjustments. If we assume there is a need for them, the box should be smart enough to predict which is the best combination. If octane is higher it should know to add more timing and less fuel, if octane is lower it should know to remove timing and add fuel. This is how the factory ECU works and would be keeping things going in the right direction.

Making adjustments to none tuning related things or the general boost curve seems appropriate. I thought this was already a feature.
ok.
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      08-21-2008, 06:58 PM   #93
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Why even answer to this troll Shiv? Wasting your time anyway!
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      08-21-2008, 06:59 PM   #94
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Quote:
Originally Posted by scalbert View Post
If you are not sure then you need to refrain from the topic any further. It is fairly simple to do and has been done for many years.
Modern engines use knock sensor to predict knock. If knock can be predicted by the available sensors input, boost, crank, throttle, temperature, do share. A crank sensor could predict misfire but such a misfire is already checked by the factory ECU and would enable the safety system.
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      08-21-2008, 07:01 PM   #95
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Back OT.

Shiv,

Are some of these features sort of spin offs of what you had on the SMART system and the XEDE on the evo platform?
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      08-21-2008, 07:07 PM   #96
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Quote:
Originally Posted by aab3218 View Post
The factory ECU already does these fine trimmings, there should be no need for minor adjustments. If we assume there is a need for them, the box should be smart enough to predict which is the best combination. If octane is higher it should know to add more timing and less fuel, if octane is lower it should know to remove timing and add fuel. This is how the factory ECU works and would be keeping things going in the right direction.

Making adjustments to none tuning related things or the general boost curve seems appropriate. I thought this was already a feature.
You pretty nailed it there, the DME makes fine adjustments. And is somewhat conservative, rightfully so I should add. In addition, it is quicker to take away than to give back. Why not offer those who want to run higher octance fuel, than what the DME would naturally adapt to (somewhere int he 94 ocatne realm seems to be the DME's natural limit).

On your second point, that is the majority of the adjustments; user preferenmces on how it responds. The UT only allows the shape to be altered. Some of the new adjustments will allow the user to select how quickly boost is applied in relation to throttle angle.
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      08-21-2008, 07:07 PM   #97
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Didn't see any mention of activating MAP 1/2 from valet mode. Is this possible.
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      08-21-2008, 07:10 PM   #98
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Quote:
Originally Posted by aab3218 View Post
Modern engines use knock sensor to predict knock. If knock can be predicted by the available sensors input, boost, crank, throttle, temperature, do share. A crank sensor could predict misfire but such a misfire is already checked by the factory ECU and would enable the safety system.
BTW, knock sensors do not predict knock, they accoustically hear it. Knock control is a reactive system, not proactive. This is why retard is incoporated into the PROcede so that the DME does not need to react to knock events.

You are not thinking about all aspects. I will not get into now but it should be clear in the near future.
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      08-21-2008, 07:24 PM   #99
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Originally Posted by Humtek View Post
Back OT.

Shiv,

Are some of these features sort of spin offs of what you had on the SMART system and the XEDE on the evo platform?
Not really. We have some hardware on the PROcede we never had on the Xede. As such, we have a few more options on the table

Shiv
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      08-21-2008, 08:12 PM   #100
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The longer we can keep the troll on the line, the quicker I can figure out his style and depants him.
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      08-22-2008, 12:03 AM   #101
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you want to de-pant him?
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      08-22-2008, 12:48 AM   #102
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you want to de-pant him?
I thought it sounded funnier than "decloak".
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      08-25-2008, 11:38 AM   #103
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shiv, any updates on V3.1?

also, when will new doomsday/lagfix maps be available?

right now i am running the doomsday stage 0 map... i havent even used the remote map switcher yet. i am itching to use it!!!
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      08-25-2008, 11:43 AM   #104
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Quote:
Originally Posted by daixloxbmw View Post
shiv, any updates on V3.1?

also, when will new doomsday/lagfix maps be available?

right now i am running the doomsday stage 0 map... i havent even used the remote map switcher yet. i am itching to use it!!!
he just put up a new map for the lag problem of 29.2 or MSD 81 a few days ago!
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      08-25-2008, 12:35 PM   #105
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well i really meant to ask about the new doomsday maps that shiv said he was working on. i included the lagfix part because i was hoping the new doomsday map would incorporate the lagfix part as well.
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      08-25-2008, 01:47 PM   #106
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I need to read up on this doomsday stuff. For those running the newer sw would recommend using this right? what about those who have the previous one of 29.1?
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