Exhaust flap vacuum line

[N54gasm]

So looking to clean up the bay a bit more, and want to re route that ugly vacuum line/remove the exhaust flapper vacuum line. Am fabricating vacuum canisters and going to relocate them with the new turbo/relocated inlets. So my question is, is the vacuum line for the exhaust flapper tee'd into the brake booster line that sits near the left strut tower, tucks under the cowl and runs back to the back?

 

[Brandin.byers]

Following

 

[doublespaces]

Good question. I'm curious also as I will be using that vacuum line in the back. I'd be more interested, in how to toggle the solenoid in the back manually using a wire up front or something.

 

[N54gasm]

Good question. I'm curious also as I will be using that vacuum line in the back. I'd be more interested, in how to toggle the solenoid in the back manually using a wire up front or something.

Id imagine just intercepting the signal wire and installing a switch

 

[ryanmamikel]

So looking to clean up the bay a bit more, and want to re route that ugly vacuum line/remove the exhaust flapper vacuum line. Am fabricating vacuum canisters and going to relocate them with the new turbo/relocated inlets. So my question is, is the vacuum line for the exhaust flapper tee'd into the brake booster line that sits near the left strut tower, tucks under the cowl and runs back to the back?

Yes, That line is the supply for the vacuum actuated flapper in the rear.

 

[ryanmamikel]

Good question. I'm curious also as I will be using that vacuum line in the back. I'd be more interested, in how to toggle the solenoid in the back manually using a wire up front or something.

The circuit for the exhaust flap control is very basic. Power from the junction box, ground supplied by the DME. You could install a simple on/off switch to control it. There is the possibility that it is PWM regulated, I would have to scope it to find out. This is the circuit from my 1-series, if you need a more accurate one for you car let me know.

exhaust flap control

• ryanmamikel
• Mar 15, 2017

 

[N54gasm]

BEAUTIFUL! Thank you!!

 

[rebo0t]

Awesome info, if it is indeed PWM regulated maybe there is a way we can control it. Keep it closed all the time below a certain RPM

 

[ryanmamikel]

Awesome info, if it is indeed PWM regulated maybe there is a way we can control it. Keep it closed all the time below a certain RPM

I was thinking the same thing actually, only have it on a roller dial of some sort, making adjust-ability more than just open/closed. The problem is, I have lots of ideas, just no time to try them out (or not a priority) .

 

[Cjdzombie]

I just leave mine open all the time. I like the added volume.

 

[rebo0t]

I was thinking the same thing actually, only have it on a roller dial of some sort, making adjust-ability more than just open/closed. The problem is, I have lots of ideas, just no time to try them out (or not a priority) .

Yessss that would be best. I'll take having it closed under a certain rpm just so I can get out of my area without waking everyone up

 

[Jake@MHD]

Good question. I'm curious also as I will be using that vacuum line in the back. I'd be more interested, in how to toggle the solenoid in the back manually using a wire up front or something.

I set mine up to trigger my Hobbs switch

 

[doublespaces]

I set mine up to trigger my Hobbs switch

For your fuel pump? How did you do that? Could you set something up so the power is flowing to that solenoid at all times? I want to insert a wireless relay into the plug right before the solenoid for an easy source of power and control the solenoid with my homelink.

 

[Jake@MHD]

For your fuel pump? How did you do that? Could you set something up so the power is flowing to that solenoid at all times? I want to insert a wireless relay into the plug right before the solenoid for an easy source of power and control the solenoid with my homelink.

I have written a lot of custom logic for myself You can make the flap always open / have power with the currently available exhaust flapper tables in the XDF.

 

[doublespaces]

I have written a lot of custom logic for myself You can make the flap always open / have power with the currently available exhaust flapper tables in the XDF.

You gonna make me use my brain. Jeez

 

[ryanmamikel]

I have written a lot of custom logic for myself You can make the flap always open / have power with the currently available exhaust flapper tables in the XDF.

I MUST learn this witchcraft.

 

[Jsherry20]

The circuit for the exhaust flap control is very basic. Power from the junction box, ground supplied by the DME. You could install a simple on/off switch to control it. There is the possibility that it is PWM regulated, I would have to scope it to find out. This is the circuit from my 1-series, if you need a more accurate one for you car let me know.

exhaust flap control

• ryanmamikel
• Mar 15, 2017

Sweetness

 

[JSR1256]

Following

 

[Suprzm3k]

Interested in this as well.