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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 > JB4 CPS offset dyno testing and logs



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      03-23-2011, 08:41 PM   #89
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Quote:
Originally Posted by Clap135 View Post
Protune? I am doing that with stage 1, and have been doing that for 3k miles.....Actually I am hitting 15psi falling to 13

But heres a 13-14psi stage 1 tune, notice the timing?

91 octane and 91 octane map? 93 octane and 93 octane map? Or 93 octane with 91 octane map?
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      03-23-2011, 08:53 PM   #90
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93 and 93
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      03-23-2011, 09:14 PM   #91
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Quote:
Originally Posted by JPSlick View Post

We are improving a product. Indirectly helping you and other JB users.

Yet you fight us constantly when you should be thanking us.

Sit back, learn a thing or 2....

Maybe it's your delivery......just maybe.
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      03-23-2011, 09:14 PM   #92
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Quote:
Originally Posted by Litos View Post
Map 1 on JB4 with 93 octane for life !!!!!

only because this seems the safest right now......
i CAN'T WAIT to see if Cobb can pull @ 80whp on a PROtune with 13.5-14psi and have NO DIPS.

if they can do that i'll be a Cobb fanboi and Cobb user.
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      03-23-2011, 09:32 PM   #93
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safest meaning i have an IC, it's not 110 degrees in Houston right now, my car is running 93 octane and it's only running @ 13.5psi.






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      03-24-2011, 09:58 AM   #94
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Quote:
Originally Posted by Mike@N54Tuning.com View Post
Back to your question, one criteria would be seeing a big dip in power at that RPM due to the abnormal combustion. The DME is pretty good are predicting when real knock is about to happen and circumventing it. Somehow it picks up early frequencies indicating things are turning south before it actually does. There is also a thread on another forum discussing how the DME may be pulling knock info through the ignition system as well.

Mike
You mean the "ion" signal issue via the spark plug electrode?
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Last edited by Ilma; 03-24-2011 at 12:52 PM.
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      03-24-2011, 10:03 AM   #95
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Quote:
Originally Posted by Ilma View Post

How many dips in timing before you call it real knock?
That, and the fact that there's usually about a 10% variation in cylinders/injectors - so one or two cylinders could have moderate knock while the others only light or no knock. Then you would have to know how the Siemens ECU analyzes individual cylinder knock and when it begins to pull timing on each cylinder. So, to add to the confusion: is the timing signal we see just cylinder #1 or a "voting" of all the cylinder timings?
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      03-24-2011, 10:11 AM   #96
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Quote:
Originally Posted by SennaZ View Post
That, and the fact that there's usually about a 10% variation in cylinders/injectors - so one or two cylinders could have moderate knock while the others only light or no knock. Then you would have to know how the Siemens ECU analyzes individual cylinder knock and when it begins to pull timing on each cylinder. So, to add to the confusion: is the timing signal we see just cylinder #1 or a "voting" of all the cylinder timings?
I think it's just one of the cylinders.

With the BT tool I think you can choose which cylinder you want to log, but with procede there is no option. Not sure about JB4.
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      03-24-2011, 10:30 AM   #97
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Quote:
Originally Posted by Ilma View Post
I think it's just one of the cylinders.

With the BT tool I think you can choose which cylinder you want to log, but with procede there is no option. Not sure about JB4.
can you log all cylinders, THAT would be most useful.
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      03-24-2011, 11:24 AM   #98
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Quote:
Originally Posted by Sniz View Post
can you log all cylinders, THAT would be most useful.
With BT? Probably.
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      03-24-2011, 11:29 AM   #99
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Quote:
Originally Posted by Clap135 View Post
Nothing recent as there is no point of logging this thing, my tune simply does not move.
+1 this is one of the benefits of the flash, its very consistent
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      03-24-2011, 11:42 AM   #100
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Quote:
Originally Posted by 335iseb View Post
Maybe it's your delivery......just maybe.
Cool story bro
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      03-24-2011, 07:23 PM   #101
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Originally Posted by JPSlick View Post
Cool story bro
Likewise, bro.
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      05-15-2012, 10:26 AM   #102
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Bryce - I think spreading awareness is great, but it might be difficult to have a meaningful discussion pertaining to this matter. We've all seen some variation of the following arguement countless times:

Tuning Expert: "BMS has a lot to learn when it comes to ignition timing/cps offsetting (shows data & graphs)"

Terry/Mike: "That graph isn't showing knock in the traditonal sense also we don't really get how it works, so we're going to ignore it. Ooohhhh, look at how much power we're making. Boost POWER up!!"

Tuning Expert: "You're kind of missing the point...."

Mike/Terry/Alias:"Look, there are thousands of BMS tuned N54's on the road and their engine's haven't blown up, so uh, let's move along"

Tuning Expert: "There's no evidence to support that claim, and besides, not offsetting timing causes a host of other issues (shows more data)"

Terry/Mike/Alias: "Boost POWER UP!! JB4 rocks!!!"

Tuning Expert: "Sigh..."
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      05-15-2012, 10:33 AM   #103
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ok, valid points.


while i would welcome a discussion on CPS offsetting from BMS customers or vendors, my other point was to illustrate that BMS doesn't know what the fuck they're doing and trusting them to tune your $50k bmw is a little foolish
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      05-15-2012, 10:48 AM   #104
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a couple screen shots of the current JB CPS user interface would interesting. I'm sure they have expanded on the original offset per rpm at WOT.
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      05-15-2012, 04:39 PM   #105
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Quote:
Originally Posted by Laguna Seca Blue View Post
...
Your Timeline:
Total your last car
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Buy tune
Ride tuner's ____
Become N54 expert in 2 months
Start thread in the hopes of implying that people buying other tunes are uneducated or poor.
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      05-15-2012, 05:00 PM   #106
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Quote:
Originally Posted by bryce View Post
ok, valid points.


while i would welcome a discussion on CPS offsetting from BMS customers or vendors, my other point was to illustrate that BMS doesn't know what the fuck they're doing and trusting them to tune your $50k bmw is a little foolish
Yeah, you're right, they have NO idea what is going on....

Can you elaborate on the benefits of CPS offsetting with data?

Do you think there is as much benefit with the lower advanced ignition curve of the 1M/335is at WOT?

Do you agree that you can avoid "timing dips" and potential "knock" by running less boost. (Matching boost to your octane, which the tune has a map to do automatically)
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      05-15-2012, 05:02 PM   #107
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Quote:
Originally Posted by Laguna Seca Blue View Post
Bryce - I think spreading awareness is great, but it might be difficult to have a meaningful discussion pertaining to this matter. We've all seen some variation of the following arguement countless times:

Tuning Expert: "BMS has a lot to learn when it comes to ignition timing/cps offsetting (shows data & graphs)"

Terry/Mike: "That graph isn't showing knock in the traditonal sense also we don't really get how it works, so we're going to ignore it. Ooohhhh, look at how much power we're making. Boost POWER up!!"

Tuning Expert: "You're kind of missing the point...."

Mike/Terry/Alias:"Look, there are thousands of BMS tuned N54's on the road and their engine's haven't blown up, so uh, let's move along"

Tuning Expert: "There's no evidence to support that claim, and besides, not offsetting timing causes a host of other issues (shows more data)"

Terry/Mike/Alias: "Boost POWER UP!! JB4 rocks!!!"

Tuning Expert: "Sigh..."
Can you link to that thread? I've never seen a discussion that ridiculous from Mike or Terry.

Seems like some people here are delusional, fantasizing about conversations that never took place.....
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      05-15-2012, 05:47 PM   #108
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^Sure, and when I say alias, I'm referring to devoted fans as well.

http://www.e90post.com/forums/showthread.php?t=491784
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      05-15-2012, 05:58 PM   #109
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Quote:
Originally Posted by Laguna Seca Blue View Post
^Sure, and when I say alias, I'm referring to devoted fans as well.

http://www.e90post.com/forums/showthread.php?t=491784
Ok, so if you had a car that did not experience these timing drops, would you say the tune is working well?

What if I told you that you can get a JB4 that has CPS offsetting as well.

Have you spoke with an engineer of the DME to ask how the Ignition Timing system of the N54 truly works, and what represents actual knock or dangerous knock/pre-ignition?

Would seem silly for BMW to release cars to the world that are tuned to slowly kill themselves on stock boost and ignition curves.....
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      05-15-2012, 05:58 PM   #110
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With the zealots on here this place has become a joke.
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