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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 > I love my JB4 but..... (feature request)



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      04-02-2013, 06:42 AM   #23
dman918
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Originally Posted by BEAR-AvHistory View Post
Expect someone who does not have that much patience is someone who should not be driving.
That statement is just stupid. It's not a matter of patience and it certainly has no correlation to my ability to drive.
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      04-02-2013, 07:06 AM   #24
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It is roughly 4 miles on my commute.
get one of these....

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      04-02-2013, 09:03 AM   #25
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get one of these....

No, its 4 miles into my commute, commute is 41 miles !
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      04-02-2013, 10:09 AM   #26
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No, its 4 miles into my commute, commute is 41 miles !
ahhhh, I see said the blind man as he picked up his hammer and saw.....
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      04-02-2013, 10:27 AM   #27
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Originally Posted by BEAR-AvHistory View Post
Think if would be a bad plan to have it turn off. First chump who blew a cold motor would go into full sue mode demanding damages.

Temp is 160 or about 4 miles driving. Expect someone who does not have that much patience is someone who should not be driving.
As mentioned above, flash tunes on multiple platforms do not have this safety feature. Nor does Cobb (or at least it's implementation is very mild) on this platform - haven't read of any blown engines (because of boosting when cold) yet. I would guess giac does not limit boost either, but not sure on that.

Bolded quote is one of the more head scratching things I've read in awhile.

Common sense dictates you wait until the engine is warmed up before romping on it, but if I decided to, please don't baby sit me and prevent me from getting on it before 160.

The whole discussion is somewhat moot since jb4 does allow you to change this, but it certainly is not obvious what you need to do.
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      04-02-2013, 10:57 AM   #28
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Quote:
Originally Posted by dman918 View Post
That statement is just stupid. It's not a matter of patience and it certainly has no correlation to my ability to drive.
Really, I would be more than happy to change it. If someone can't wait 4 miles or so for the oil to warm up how would you describe them?

Granted everyone here is a great driver, how about using the word judgment instead?
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      04-02-2013, 11:02 AM   #29
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Quote:
Originally Posted by foghat View Post
As mentioned above, flash tunes on multiple platforms do not have this safety feature. Nor does Cobb (or at least it's implementation is very mild) on this platform - haven't read of any blown engines (because of boosting when cold) yet. I would guess giac does not limit boost either, but not sure on that.

Bolded quote is one of the more head scratching things I've read in awhile.

Common sense dictates you wait until the engine is warmed up before romping on it, but if I decided to, please don't baby sit me and prevent me from getting on it before 160.

The whole discussion is somewhat moot since jb4 does allow you to change this, but it certainly is not obvious what you need to do.
Its a "future use" code, but its not a punch it out of the driveway thing. It just switches from oil to coolant temp for the boost trigger because the coolant come up faster. IMHO not a great plan but better than nothing.
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      04-02-2013, 11:22 AM   #30
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Quote:
Originally Posted by BEAR-AvHistory View Post
Think if would be a bad plan to have it turn off. First chump who blew a cold motor would go into full sue mode demanding damages.

Temp is 160 or about 4 miles driving. Expect someone who does not have that much patience is someone who should not be driving.

1: Who has blown a motor because of this?
2: Through what mechanism does the motor get blown?
3: If you're talking higher oil pressures, do you know the difference between <160* oil temp pressures and >160* oil temp pressures? More specifically, do you know those pressures in the turbo?
4: Are those (presumably significantly elevated) oil pressures outside the operating parameters?
5: Is the engine inadequately lubricated at <160* oil temps? If so, how do you know this?

Maybe what you should have said was "Conventional wisdom has been that it's really important to let things warm up before flogging them. I feel so strongly about this that I'm willing to be insulting in order to get my point across".

Real data, real experience, a reference, something useful please.
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      04-02-2013, 11:49 AM   #31
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Quote:
Originally Posted by BEAR-AvHistory View Post
Its a "future use" code, but its not a punch it out of the driveway thing. It just switches from oil to coolant temp for the boost trigger because the coolant come up faster. IMHO not a great plan but better than nothing.
I know it just switches to coolant temp vs. just enabling from the get go. Like you say, better than nothing.
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      04-02-2013, 11:50 AM   #32
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Quote:
Originally Posted by SCGT View Post
1: Who has blown a motor because of this?
2: Through what mechanism does the motor get blown?
3: If you're talking higher oil pressures, do you know the difference between <160* oil temp pressures and >160* oil temp pressures? More specifically, do you know those pressures in the turbo?
4: Are those (presumably significantly elevated) oil pressures outside the operating parameters?
5: Is the engine inadequately lubricated at <160* oil temps? If so, how do you know this?

Maybe what you should have said was "Conventional wisdom has been that it's really important to let things warm up before flogging them. I feel so strongly about this that I'm willing to be insulting in order to get my point across".

Real data, real experience, a reference, something useful please.
FWIW the warmup feature was added after users of various tunes started reporting "whining" turbos after weeks or months of building heavier boost levels with colder engine oil.

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      04-02-2013, 11:55 AM   #33
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Quote:
Originally Posted by Mike@N54Tuning.com View Post
FWIW the warmup feature was added after users of various tunes started reporting "whining" turbos after weeks or months of building heavier boost levels with colder engine oil.

Mike
Good info, thank you. That's what I'm talkin' bout.
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      04-02-2013, 12:12 PM   #34
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Also the water temp trigger swap was added after months of whining about it taking to long to get boost. The water temp swap was a compromise, maybe not a great one, but as was said its better than nothing.
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      04-02-2013, 12:15 PM   #35
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Quote:
Originally Posted by SCGT View Post
1: Who has blown a motor because of this?
2: Through what mechanism does the motor get blown?
3: If you're talking higher oil pressures, do you know the difference between <160* oil temp pressures and >160* oil temp pressures? More specifically, do you know those pressures in the turbo?
4: Are those (presumably significantly elevated) oil pressures outside the operating parameters?
5: Is the engine inadequately lubricated at <160* oil temps? If so, how do you know this?

Maybe what you should have said was "Conventional wisdom has been that it's really important to let things warm up before flogging them. I feel so strongly about this that I'm willing to be insulting in order to get my point across".

Real data, real experience, a reference, something useful please.
Good questions, but I think Mike answered them before I got back.

BTW this morning, 51 degrees, average speed 50mph & 4.3 miles till the system armed. Trans mostly in 7th gear. Running a lower gear will warm the oil faster.
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      04-02-2013, 02:56 PM   #36
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ive been thinking about getting the JB4 but ive also been hearing good things about COBB.. which one is better?? or is it preference?
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      04-02-2013, 07:05 PM   #37
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ive been thinking about getting the JB4 but ive also been hearing good things about COBB.. which one is better?? or is it preference?
It definitely seems like it's preference. I've had the Cobb on my WRX and STI and it is a wonderful device. I especially like this if you go with a fully custom tune. Last, it is VERY easy for install. Just plug it in and marry it to your car. The JB4 is a great device as well, especially if you just want something that works out of the box with no custom tune (autotune map 5, here's looking at you). It's also cheaper than Cobb and has some cool features, such as guage hijacking and such. It is still easy to install, but you do have to take the car apart a little to get to the area to install.

I am now looking to buy an interface cable for the JB4 to make the change specified here in this thread, not to mention free lifetime updates and logging.

So, I still stand by the JB4 as the best bang for the buck!

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      04-02-2013, 07:34 PM   #38
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Cobb does everything for you already. There's no need for tampering and going into your ECU ever and you get proper tuning most of all.
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