DPF Delete Pipe & ECU Reflash Source

[daytonatrbo]

Originally Posted by Ricky Bobby

I have zero faith in the emissions system reliability for the long term. The engine and everything else, yes, but I won't bankrupt myself after warranty expires just to be "green" -

That's basically my feelings on it. In TN I don't have to worry about any inspections. And the peace of mind of eliminating the most troublesome part of an otherwise excellent engine is worth way more than any HP or MPG gains.

[Stockx5]

Originally Posted by bawareca

It is doable to add a new sub-routine in the DDE, but only if someone has the original manufacturer description of the programming structure. But after all the t-stat fails only every 60-80k miles. Which reminds me that I have to check mine.


Although I have access to many lifts, I did mine with the car on jack stands. I removed passenger side motor mount and bracket, lifted the engine slightly, dropped the subframe a bit and was able to wiggle the DPF out. The long pipes for the pressure differential sensor have to be bent because they are hitting the firewall on the way out. It is not particularly pleasant job, but doable.

how did you lift the engine? and how many hours would you say it would take to remove it. and to put it back?

was hoping i could jack up the engine from the bottom with a regular shop jack.

also where is the dme and whats involved in removing it? i googled for a diy but apparently its a state secret.

Originally Posted by daytonatrbo

That's basically my feelings on it. In TN I don't have to worry about any inspections. And the peace of mind of eliminating the most troublesome part of an otherwise excellent engine is worth way more than any HP or MPG gains.

well that makes 3 of us.

I'm gonna kill the emissions components before it kills my engine.

I think Im gonna go with the dpf gut out path then that way i know it fits perfect, there will be no long term reliability problems due to installing aftermarket material and I wont have to spend extra dime on it.

should be simple enough to cut it with a grinder remove everything and weld it back with a arc welder...since I don't have Oxy acetalene.

[garagelogician]

Originally Posted by bawareca

Although I have access to many lifts, I did mine with the car on jack stands. I removed passenger side motor mount and bracket, lifted the engine slightly, dropped the subframe a bit and was able to wiggle the DPF out. The long pipes for the pressure differential sensor have to be bent because they are hitting the firewall on the way out. It is not particularly pleasant job, but doable.

I've never wrenched on a BMW before, do they use one-time use "stretch" bolts like VW/Audi does?

[daytonatrbo]

Originally Posted by Stockx5

I think Im gonna go with the dpf gut out path then that way i know it fits perfect, there will be no long term reliability problems due to installing aftermarket material and I wont have to spend extra dime on it.

should be simple enough to cut it with a grinder remove everything and weld it back with a arc welder...since I don't have Oxy acetalene.

As long as you have the right filler rod.

Originally Posted by garagelogician

I've never wrenched on a BMW before, do they use one-time use "stretch" bolts like VW/Audi does?

The subframe bolts are recommended to be replaced upon removal.

[bigmackmiller]

Could always get the 409ss ceramic coated to prevent the surface rust, curious as well what you used to lift the engine?

[Stockx5]

@bawareca

am I right to assume then that the mid pipe o2 sensors listed here (1 and 11) are turned off by your tune?

[bawareca]

Originally Posted by Stockx5

@bawareca

am I right to assume then that the mid pipe o2 sensors listed here (1 and 11) are turned off by your tune?

1 and 11 are NO sensors and yes, they are out of commission for the time being

[Badsmerf]

How much impact does this have on emissions? Are there any numbers too show the difference with and without? I'm currently going to have to wait a month for a cat and pay more to keep the scr system I than it would to pull it. Obviously for off road use.

[ard]

Originally Posted by Badsmerf

How much impact does this have on emissions? Are there any numbers too show the difference with and without? I'm currently going to have to wait a month for a cat and pay more to keep the scr system I than it would to pull it. Obviously for off road use.

Im curious...is there a percentage of impact where you will decide "oh, thats too much polution for my car- I'll just fix it properly."????

[Thecastle]

Originally Posted by Badsmerf

How much impact does this have on emissions? Are there any numbers too show the difference with and without? I'm currently going to have to wait a month for a cat and pay more to keep the scr system I than it would to pull it. Obviously for off road use.

The real question for most folks isn't how much emissions are impacted by removing various emissions devices, but can I live with the car post deletes.

There are trade offs of removing various components.

Example, remove the DOC and DPF means you will have significant diesel stink and black smoke unde certain condisitons and more noise. There is a long thread about this on e90post where folks have to keep their windows shut because of the diesel fumes.... might consider adding a doc,

Removing the scr catalyst, and def system adds more noise again, you'll really hear the turbo spool. But nearly no additional fumes. So from a living with it it's minor

So yes your car will be noisier, smellier, and more reliable. I would also keep in mind that under most conditions deleting the dpf and scr is only worth maybe 10-15hp, but is necessary if you want Hybrid. Removing the egr is pretty painless, it results in more orderless nox, bt improves fuel economy and reduces cbu

Also the more deleted the car is the harder it will be to sell, some folks want a deleted car but they are rare. Most won't want a modified car, as they think,it was raced and beat on. So as with all mods at best it won't help resale, at worst it hurts resale and you loose the cost of the mods and tune.

The car without emissions control will emit significant more hydrocarbons, particulates, NOx and noise. I'd suspect that NOx will be in the 40x range worse like on cheaty vws. Noise some more db, particulates is the really bad one as they are carcinogenic and you will be exposed to them. I personally wouldn't worry much, it's more about the resale, noise and stink (just use a dp with a doc)