[Grazy_87]

Looks good, I have always wanted the compressor surge noise the old Audi Quattro had in the group b era. If someone can devise a way of doing that I'd be all in lol!

[DWR]

Originally Posted by lnxguy

That's the anti shutter valve. That's closed on engine stop for a smooth shutdown (Also used to reduce the risk of a runaway in case one of your turbos decides to blow up and your engine starts to ingest oil)

It doesn't open and close in relation with the gas pedal.

It opens and closes in relation to EGR. Not needed for a smooth shutdown with electronic DI.

[lnxguy]

Originally Posted by DWR

It opens and closes in relation to EGR. Not needed for a smooth shutdown with electronic DI.

The ASV doesn't close during operation of the engine. The only time it's ever closed is when the engine is turned off.

Electronic DI has nothing to do with how smooth an engine is on shutdown. The ASV does.. That's one of the reasons why it's there.

[GreekboyD]

WGYL!

[Ohiodiesel]

Originally Posted by Bob@BPC

Thats correct, the throttle is not like a gas engine, however, where does the pressurize air go when you let off the pedal? It goes through the engine on decel. The DDE cuts fuel allowing the air to come through the engine out the exhaust valves, this is great when running stock boost levels, however, when you get to making almost twice as much boost than stock on a small displacement engine, some of that air cannot pass though the engine and pushes out the inlet of the turbo. This is where a BOV comes into play and helps the longevity of the turbo.

BMW now does this on gas engines as well, the N63TU & S63TU do not have any bypass valves on the engine at all.

Just purchased your system, do you have any diagrams or info on wiring it up correctly and mounting/adjusting it?

Was also trying to view the video's on this post - they say private?

[335dlci]

Originally Posted by Rlemp

Just purchased your system, do you have any diagrams or info on wiring it up correctly and mounting/adjusting it?

Was also trying to view the video's on this post - they say private?

I would like to know before purchasing an unit.

[Bob@BPC]

Originally Posted by Rlemp

Just purchased your system, do you have any diagrams or info on wiring it up correctly and mounting/adjusting it?

Was also trying to view the video's on this post - they say private?

I'll work with John today to get something up for you guys. (video or images of the install)

EDIT: Video is up

[lnxguy]

Originally Posted by Grazy_87

Looks good, I have always wanted the compressor surge noise the old Audi Quattro had in the group b era. If someone can devise a way of doing that I'd be all in lol!

That's the anti lag system you're hearing in the Group B cars.

[Ohiodiesel]

Originally Posted by Bob@BPC

I'll work with John today to get something up for you guys. (video or images of the install)

EDIT: Video is up

Can you re-post the up close pictures? The link is broken on them.

I have been talking on the phone with BPC to get the BOV wired and configured properly - they are probably one of the best shops I have ever bought from - support and question wise. I will post a video and put up pictures when it is completed. I called around and talked to a few machine/fab shops local to me to get the BOV TIG welded in the position it needs to be. Should be getting it back tomorrow and finishing the install.

Through much debate (not really caring about the "cool" sound of the BOV) I have come to the conclusion that the vehicle WAS NOT designed to handle the amounts of boost it is at currently with a stage 2+ tune.
It might not be 100% necessary to function properly but wouldn't hurt anything to say the least - to remove the 30+ lbs. of boost that is surging back through the engine on decel and release it to atmosphere.
The arguments about the MAF and the vehicle running rich upon & after decel are really not factors to be worried about since the BOV is downstream of the MAF - shouldn't effect anything in that regard as you can adjust the settings to work properly with your specific tune and vehicle - regarding responsiveness and actuation time engaged/disengaged.

[335duff]

Thanks very much for the info! The throttle body part in question was replaced on my car under warranty. The dealer tech told me that itbfunctions exactly the same way as on a gas car. He then proceeded to tell me that in diesel engines the throttle pedal regulates air, and that it regulates fuel in a gas engine.

I then pulled Bosch Diesel Engine Management Systems from the trunk, had a laugh.

When I datalog the channel in torque it only ever says 96% or 0%, whatever that means.

[lnxguy]

Originally Posted by 335duff

Thanks very much for the info! The throttle body part in question was replaced on my car under warranty. The dealer tech told me that itbfunctions exactly the same way as on a gas car. He then proceeded to tell me that in diesel engines the throttle pedal regulates air, and that it regulates fuel in a gas engine.

I then pulled Bosch Diesel Engine Management Systems from the trunk, had a laugh.

When I datalog the channel in torque it only ever says 96% or 0%, whatever that means.

It's scary that BMW 'techs' can't even wrap thier head around how a diesel engine functions. Lol throttle valve and air regulation.

[Bob@BPC]

Originally Posted by 335duff

Thanks very much for the info! The throttle body part in question was replaced on my car under warranty. The dealer tech told me that itbfunctions exactly the same way as on a gas car. He then proceeded to tell me that in diesel engines the throttle pedal regulates air, and that it regulates fuel in a gas engine.

I then pulled Bosch Diesel Engine Management Systems from the trunk, had a laugh.

When I datalog the channel in torque it only ever says 96% or 0%, whatever that means.

The throttle is there for safety, The only time it will close when driving is when the DDE goes into limp home mode.

Also, Im working on a wiring write up for the BOV kit. Should be up later today

[335stoner]

So out of curiosity.... I noticed that that bov is post maf sensor, when the vavle is open wouldnt that cause a rich condition??

I know diesel and gas are different so if I am wrong please excuse my ignorance

When turboing by Tacoma bov style (atmosphere \ recirculated) placement was important to maf location.. If it was post maf and atmosphere vent the air passing over the maf is metered and would cause demand for fuel and cause am extremely rich condition between shifts... In that case post maf vented air would need to be recirculated back into the air stream pre turbo... I went with a pre maf atmosphere vent since it would release the air before it got to the maf and got my whip crack between shifts

[Bob@BPC]

Originally Posted by 335stoner

So out of curiosity.... I noticed that that bov is post maf sensor, when the vavle is open wouldnt that cause a rich condition??

I know diesel and gas are different so if I am wrong please excuse my ignorance

When turboing by Tacoma bov style (atmosphere \ recirculated) placement was important to maf location.. If it was post maf and atmosphere vent the air passing over the maf is metered and would cause demand for fuel and cause am extremely rich condition between shifts... In that case post maf vented air would need to be recirculated back into the air stream pre turbo... I went with a pre maf atmosphere vent since it would release the air before it got to the maf and got my whip crack between shifts

short answer no. The DDE fuel cuts when the throttle pedal goes into a negative voltage (this is how the turbosmart BOV controller functions as well). When it does this, it allows air to pass through the engine and out the exhaust. The M57, N57, N63TU & S63TU use this method to bypass pressure.

EDIT: One last note, the DDE does not use the MAF for fuel trimming (It can use it for fueling if the o2, and MAP sensors die), its used for EGR airflow.

[Ohiodiesel]

So got everything installed and functioning properly. Sounds pretty nice and works as advertised. I will give some advice and pointers about this install with pictures from mine specifically:

1. The BOV mounting position is IMPORTANT when you have it welded. If you don't have it welded in the correct position, it will be impossible to put the pipe back into place and it will make contact in numerous places where you don't want it to. It should be mounted as in my pictures and on BPC's website. It will sit close & in-between the alternator pulley and the plastic radiator fan cowl. I'm only talking an inch or less space to play with.

2. Wiring it up - (with help from BPC) you have to run a 12v accessory wire & ground (can source ground from DDE box but I chose to run from inside cabin) through the rubber grommet in the firewall behind the DDE white box and under the rubber drain catch. (pull it out of the way) I used a bent clothes hanger to run it through the grommet from the engine side - to the inside (since its hard to get to inside the vehicle). You shouldn't have to pull the carpet back.
The wire in my picture is the wire that has the 0-5v throttle signal. It should register just under 1v DC (see picture) when you have the vehicle either started or the ignition on. If you have the right wire, it should go up in voltage - to just under 5v DC when the pedal is pressed to the floor. It is on the 40 pin connector on the DDE (there's only one 40-pin connector). It will be either pin 28-29. Tap into that wire for your (White wire TPS signal on the Turbo Smart controller)
You will only use the White, Yellow, Red & Black wires. Red is 12v accessory input (fused) black is ground and yellow is the signal I/O to the relay.

3. Mounting - (See pictures) I decided to mount the controller inside the DDE box since it is not waterproof. The wires run along the front part of the engine bay alongside the other electrical wires coming from the DDE location.
The relay I chose to mount to one of the two bolts by the power steering reservoir.

4. Hose - Hoses run as in supplied directions but I chose to use the spare inlet on my race pipe for the pressure source - since its in the same piping location. I didn't want to tap (and possibly strip) a new hole on the charge pipe. You should have enough hose for both runs - solenoid to BOV and solenoid to pressure source (race pipe)

[Ohiodiesel]

Originally Posted by 335stoner

So out of curiosity.... I noticed that that bov is post maf sensor, when the vavle is open wouldnt that cause a rich condition??

I know diesel and gas are different so if I am wrong please excuse my ignorance

When turboing by Tacoma bov style (atmosphere \ recirculated) placement was important to maf location.. If it was post maf and atmosphere vent the air passing over the maf is metered and would cause demand for fuel and cause am extremely rich condition between shifts... In that case post maf vented air would need to be recirculated back into the air stream pre turbo... I went with a pre maf atmosphere vent since it would release the air before it got to the maf and got my whip crack between shifts

In just a day or so's driving - I haven't noticed ANY issues regarding my air/fuel being to rich from the BOV releasing pressure. It actually makes the pedal response more "tuned" feeling and responsive in my opinion. I have the settings with duration and sensitivity at close to 50% - it actually will only release the amount of throttle response it senses. For example - If i'm only 40% on the throttle and let off - I will get about 40% release of pressure VIA BOV. If I give 100% throttle - It will release 100% of the pressure buildup - and so on. So its only releasing what it should in relation to the actual throttle movement.

[Bob@BPC]

More wiring info

[daltonnnn]

can this be installed on the x5d?

[Bob@BPC]

Originally Posted by daltonnnn

can this be installed on the x5d?

Yes, the DDE output wire will be the same.

[335dlci]

For those who don't want to tap into their engine harness, this may be a solution.. make a piggy back and make a 3rd leg come off at the pedal https://m.aliexpress.com/item/327032...MwNBJ#autostay

[ChiDiddy]

Can I ship my charge pipe to BPC to make sure it's welded in the right place?

[Bob@BPC]

Originally Posted by ChiDiddy

Can I ship my charge pipe to BPC to make sure it's welded in the right place?

I'll talk with Eric and will let you know. Send me a PM for more info.