x5 35d SES codes - NOx sensor

[Stockx5]

Originally Posted by IronRobi

But looking at the buzzken kit, that SCR pipe looks to be a straight pipe that any exhaust shop could do for less than $100. It is also missing the EGR block off plate which I'm having a hard time finding a source for these plates. Thoughts or suggestions?

The midpipe / scr pipe is not completly straight. Shop I went to told me they can't make that bend without having creases in the bend which is bad for the turbos.

If they can custom bend it having it perfectly smooth I don't see why not.

from what I understand it's not standard equipment.

[robnitro]

Originally Posted by Stockx5

The midpipe / scr pipe is not completly straight. Shop I went to told me they can't make that bend without having creases in the bend which is bad for the turbos.

If they can custom bend it having it perfectly smooth I don't see why not.

from what I understand it's not standard equipment.

I doubt that a creased bend would put as much back pressure as the stock scr/dpf/doc or muffler. It wouldn't even have an effect compared to the aftermarket doc that some get on the down pipe.

It would not be bad for the turbos... Just not perfect flow of that size pipe, but it's not like we have a small exhaust for the size and power of our engine.

[IronRobi]

Originally Posted by daytonatrbo

Haven’t seen the Circuit works kits, but most of the pipes you find on eBay are for the European models and are not a direct bolt on.

Since I was doing all the work in my yard, bolt-on was key.

Good catch, the posting does specify for euro x5's. Although Circuit Werks as a company appears to be out of Texas, they may be importing parts and branding them as their own.

Originally Posted by Stockx5

The midpipe / scr pipe is not completly straight. Shop I went to told me they can't make that bend without having creases in the bend which is bad for the turbos.

If they can custom bend it having it perfectly smooth I don't see why not.

from what I understand it's not standard equipment.

I believe it was your post I read that had fitment issues with the buzzken kit and then a nightmare with your initial tuner. Any advice on getting it to fit properly without leaks? You've both settled on DUDMD for tuning and both appear happy there.

It's already started snowing up here so I doubt I'll be installing myself on the cold ground. I've got an awesome diesel mechanic that should be able to handle the job. How many hours would you estimate for install on a kit like this?

[daytonatrbo]

Those with the right tools and familiarity with the job still take the better part of a day. Theres a learning curve. Someone who hadn’t done one before, even with a well equipped shop could end up spending more than 8 hrs.

I spread it out over 2 weekends with the week in between being utilized to round trip the DDE to DUDMD.

If you have a specialty shop that can do the work, experimenting with another pipe would benefit the community. And for the LP-EGR you could potentially cut the flange off actuator and tig weld a filler in.

But, by the time you pay someone to do all that, I’m sure you’d spend as much as the BuzzKen pipe. Just have the joint between the mid-pipe and the piece you need from the old mid pipe welded instead of relying on the clamp. I thought mine wasn’t leaking, but last time I had it off I did find a slight trail of soot out through the clamp.

[Stockx5]

Originally Posted by IronRobi

I believe it was your post I read that had fitment issues with the buzzken kit and then a nightmare with your initial tuner. Any advice on getting it to fit properly without leaks? You've both settled on DUDMD for tuning and both appear happy there.

It's already started snowing up here so I doubt I'll be installing myself on the cold ground. I've got an awesome diesel mechanic that should be able to handle the job. How many hours would you estimate for install on a kit like this?

On my cars's install both down pipe to midpipe and midpipe to muffler connections had to be welded. (maybe because I did not tighten the sleeve properly)

On the second install I did on my buddy's x5 the buzzken midpipe to down pipe connection would not fit more than about 1/4 of an inch even after cuting up the midpipe on both sides with a sawzall to get it to open. the pipe just wast round and required a weld. the mid pipe to muffler sleve however did seal properly after over tightening it.

so yes who knows what yours will look like the it's kind of a rough fabrication process they have. maybe yours fits like a glove who knows.

The aspect of our tune (DUDMD) that is significant IMO is that I have removed the passive and active tank without limp or CEL's and I do not think anyone else has done that.

even some guys at the e90 forums are looking for resistors and gimmicky stuff to remove their tanks after being tuned by major name tuners. (I believe BPC )

it's significant because when your tank goes bad you go into limp mode. and right now the tanks are free under warranty but 100k miles down the road when it does go bad it probably wont be. they are around 1200 each new. My used active tank sold on ebay for $650

another aspect of a tune that I have seen others struggle with is that some people have gotten misfires with no CEL and no codes logged. this is a huge problem as some tunes appear to numb out the ECU by routinely deleting codes that come up.

so when you have a injector issue or some weird problem later you will have no choice but to send the ecu back and run a detuned or mild version of the tune just to get the errors to log.

[IronRobi]

Originally Posted by Stockx5

so when you have a injector issue or some weird problem later you will have no choice but to send the ecu back and run a detuned or mild version of the tune just to get the errors to log.

This is enough of an issue to keep me from doing this mod. It's my wife's daily driver first and foremost. I'd love the extra power for the times I drive it, but the downtime we'd be looking at if any other issues arise to ship the ECU out of country and back to log the errors, and then do it again once the errors are fixed. She'd kill me.

[daytonatrbo]

The X5 is my wife’s DD. So far no concerns from her or with me.

[robnitro]

Originally Posted by IronRobi

This is enough of an issue to keep me from doing this mod. It's my wife's daily driver first and foremost. I'd love the extra power for the times I drive it, but the downtime we'd be looking at if any other issues arise to ship the ECU out of country and back to log the errors, and then do it again once the errors are fixed. She'd kill me.

In Canada you have jr, aka www.chiptuning.ca which doesn't have the complications that dudmd tune has.

[daytonatrbo]

I’m not sure whose tune is silencing actual error codes, but AFAIK DUDMD’s isn’t.

[IronRobi]

Originally Posted by daytonatrbo

I’m not sure whose tune is silencing actual error codes, but AFAIK DUDMD’s isn’t.

I'll fire them an e-mail and find out what they say.