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  #31  
Old 04-26-2017, 06:12 AM
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Why didn't you go with this source instead? https://xoutpost.com/bmw-sav-forums/...sh-source.html

I now have 73,000 miles on this mod and have never had a leak, have never had a code, and have never had a transmission acting weird ever. 163,000 total miles on my 2011 and haven't spent a penny on any issues since I installed this.
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  #32  
Old 04-26-2017, 06:53 AM
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Quote:
Originally Posted by Lambeau View Post
Why didn't you go with this source instead? https://xoutpost.com/bmw-sav-forums/...sh-source.html

I now have 73,000 miles on this mod and have never had a leak, have never had a code, and have never had a transmission acting weird ever. 163,000 total miles on my 2011 and haven't spent a penny on any issues since I installed this.
Probably because of the notably higher cost.
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2009 xDrive35D
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Deleted & Stg 2+ Tune for over 115k miles
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Being replaced by a 2016 X5d
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  #33  
Old 04-26-2017, 04:40 PM
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Quote:
Originally Posted by Lambeau View Post
Why didn't you go with this source instead?
I did look at your thread and went with this option because of the price.
The leak issues are caused by:

1. My failing to seat the flange correctly. ( did not need new gasket old one was fine)

2. the midpipe was sawzalled at the downpipe end to create a crack at the factory, this crack would never seal because it’s too long and there is not enough pipe going in to cover it.

3. the oem muffler pipe is slightly larger diameter than the Buzzken midpipe so no amount of tightening would have ever made the sleeve seal properly.

As far as the codes and check engine lights, they are caused because I unplugged the NOX sensors from the electric port. Just curious did you unplug yours or are they still dangling? And more curiosity..did you remove anything else? Like the urea tanks and the egr valve at the throttle?

Good that you never had any issues, all though I think others with other tunes like JR tuning have had a check engine light here and there and I think it’s not unheard of.

Going back to the Price topic, it’s hard to compare what each tuner does to their cocktail tune on the horsepower and torque side but BimmerOEM apparently changes “transmission torque management” And the tune I have from TRF tuning does not make any changes to transmission.

I wish there was more explanation as far as what they do to the transmission, I wonder if “transmission torque management” and “transmission adaptations” that Deftronix is working on are the same things?

Well the tune for the transmission isn’t available so we don’t know what that is going to cost.

At the same time you did not get a midpipe with your bundle and I did so I guess Im trying to compare apples to apples for the benefit of people trying to make up their minds.

Did you end up getting the stainless steel midpipe or do you still have the flex pipe? What was the cost? The muffler shop I went to said they could not make a bent pipe without having ripples in the bend which they said is no Bueno for the turbo.

Also your downpipe has kept the 2 ports for the DPF tubes(as well as a bracket leg to bolt into the car), the Buzzken downpipe does not have the tubes(or the extra bracket leg). No idea what they do. But I prefer not having them if they are not necessary just out of design clean-ness

I did get the muffler fixed for 100 bucks and that cured all the leak issues. So so far it’s $1,525 and Ill spend another 25 bucks when I send the ecu back to Bwareca.
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  #34  
Old 04-26-2017, 06:06 PM
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Without a way to directly compare the effects and the quality of the different tunes, we the laymen are left to assume they are basically all the same. So it only makes sense for us to go with the cheapest option, since none of them have anything more than anecdotal success.
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Being replaced by a 2016 X5d
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  #35  
Old 04-26-2017, 07:28 PM
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Quote:
Originally Posted by Stockx5 View Post

Going back to the Price topic, it’s hard to compare what each tuner does to their cocktail tune on the horsepower and torque side but BimmerOEM apparently changes “transmission torque management” And the tune I have from TRF tuning does not make any changes to transmission.
To change the transmission calibration, the transmission control module has to be re-flashed, which apparently no tuner can do yet. We all hope we'll be able to do it soon with our cell phones/tablets
Again, the transmission behavior is mainly influenced by the momentary output of the engine, and more precise, of the values TCU receives from the DDE. With more power output the transmission behavior is changing, but not generally. I guess the maps in the DDE could be re-calibrated in a way that it can affect the Transmission behavior to a higher degree, but that would involve thousands of hours re-flashing and testing. So the truth is that Bimmeroem, as all other tuners, does not change "transmission torque management" directly.
BTW the final rev limiting is done by the transmission. It can be raised to 6000 rpm, but it will matter only on 6th gear. On the other gears the revs will be limited by the transmission upshift. I feel there will be a benefit of 5000 rpm redline on the lower gears , but that can be achieved only by direvt TCU re-mapping.
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  #36  
Old 04-26-2017, 08:36 PM
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xHP Flashtool - Flash your automatic trans! Official thread

They can change the torque limiters, no auto upshift in M mode, and shift points.

There they have done the 335d but despite having the same engine and trans, they haven't got to the x5 35d yet.
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  #37  
Old 04-27-2017, 04:37 AM
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I assume that some of the delayed shifts and other odd behaviors we perceive are due to this torque management. The torque output of the engine seems to be limited until the transmission fully selects a gear and locks up the TC. I think without that, and the relatively massive, low rpm torque from this engine, we would see a lot more transmission failures due to burnt up TCs and clutches.

I suspect that remapping the engine for more power, and remapping the trans for quicker shifting would result in either a very harsh shift experience, or lots more wear in the transmission.
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2009 xDrive35D
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227k on the clock
Being replaced by a 2016 X5d
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  #38  
Old 04-27-2017, 09:46 AM
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Quote:
Originally Posted by daytonatrbo View Post
I assume that some of the delayed shifts and other odd behaviors we perceive are due to this torque management. The torque output of the engine seems to be limited until the transmission fully selects a gear and locks up the TC. I think without that, and the relatively massive, low rpm torque from this engine, we would see a lot more transmission failures due to burnt up TCs and clutches.

I suspect that remapping the engine for more power, and remapping the trans for quicker shifting would result in either a very harsh shift experience, or lots more wear in the transmission.
Here is how the system works(simplified):
The "gas pedal" map is called "driver's wish". In the DDE, the position of the pedal is converted to a 0-100% value. This value will have some real value meaning that is output torque of the engine (calculated internally by RPM, boost, etc). Then this value is send by the CAN bus and received by the transmission control module along with others. If your "driver wish" is 300(ft/bs for example, although it is calculated in Nm) but the engine is at 3000 rpm and no boost it is making only 150. At this point the TCU (TCU by it's own, not by a command by the DDE) will downshift (if possible) and unlock the TC. Once the RPM go up and boost will start to build. Once the output of the engine reaches DW the transmission will lock the TC and upshift depending on the DW. The transmission behavior is dictated by the engine output, not the other way around.
The transmission acts fine under boost and doesnt really need quicker shifts in my opinion. The problem is when off boost and the strategy to build boost quicker. 4000 RPM on 1st and 2nd gear are not the proper way to build boost.
There are not many documented transmission failures on diesels, but we'll see.
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  #39  
Old 04-28-2017, 05:58 PM
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Drove about 200 miles yesterday and the exhaust smell has returned with a vengance.

plugged in the vacuum to the exhaust today and sure enough there is lots of hissing at one of the weld spots and lots more right at the turbo flange.

since I did not use the vacuum test when I left the muffler shop I can't tell if these leaks developed over time or if they where never addressed. but I could swear there was no smell for a few days.

It's possible the temperature changes as well as the rigidity of the flex pipe are causing the flange to become dis engaged under different driving conditions as I assume the engine does rock back and forth under load.

the original DPF did have multiple mounting bolts securing it whereas the Buzzken downpipe simply floats.

called the shop and they did say I could bring it back if any leaks develop so I will be taking it in next week.
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  #40  
Old 05-03-2017, 08:56 PM
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went back to the muffler shop today and they corrected the leak at the weld, but there was no leaking at the turbo flange.

instead there is leaking at the turbo waste gate, lots of black soot can be seen at the actuator.

don't think there is anything to be done besides getting another turbo

the issue is common and is described here.

https://www.youtube.com/watch?v=YANt6OzRucA

so it's gonna stay like that

MPG seems to have stabilized at 25.5MPG AVG
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