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May 19, 2019 | 01:06 PM

#16

StonedGrey

Laughing Gas

Joined: Jun 2018

Posts: 803

Likes: 103

Quote:

Originally Posted by 20fordmastertech18

Specifically to a powerstroke it is able to read individual injector flow in grams per second and can compare that with engine load sensors such as your mass air flow and map sensor and then create a calculation of lean or rich. Again nox sensors read oxides of nitrogen to determine dpf efficiency not to calculate fuel. Also again, if you took away the trucks ability for it to change a/f ratio how do you suppose it would run considering a “stock” truck is changing that ratio literally every single second?

My apologies for the inaccurate ignorant info on the AFR process of a diesel.
The bottom line is still colder climates = lower fuel mileage for my truck and 3 of my friends deleted SDs & Durumax’s when its cold out.

May 19, 2019 | 01:18 PM

#17

Adam R

More Turbo

Joined: Feb 2013

Posts: 618

Likes: 69

For places that get winter fuel diesel, winter fuel is a percentage of #1 Kerosene added to the normal #2 diesel fuel. Normal #2 has around 140,000 BTU's a gallon and #1 has around 130,000 BTU's a gallon. Therefore, the BTU content is less if you are running a 20% #1 / 80% #2 mixture. I've been running a diesel for 25 years and it's pretty easy to tell based on mileage when stations switch over to winter blend. Mileage goes back up in springtime.

No real mystery why the mileage changes.

May 19, 2019 | 01:40 PM

#18

Power_Stroking

Tuned

Joined: Nov 2018

Posts: 253

Likes: 32

Quote:

Originally Posted by StonedGrey

Yea I’m in the same boat with my stock truck. Once October hits I lose 2-3mpg especially depending on how long I let it warm up for before I even move it out of the driveway. Kind of standard up here in the northeast.

May 19, 2019 | 02:12 PM

#19

Joe T

Hotshot

Joined: Mar 2017

Posts: 10,172

Likes: 1,376

From: Chaz

What’s the longest muffler I can put on in place of the dpf?

Is it straight?

Trying to see if i can maybe get a 51 inch muffler there. I’ve had enough loud vehicles.

May 19, 2019 | 02:32 PM

#20

Kenny67

Thread Starter

Freshman User

Joined: Feb 2019

Posts: 30

Likes: 0

Quote:

Originally Posted by Joe T

What’s the longest muffler I can put on in place of the dpf?

Is it straight?

Trying to see if i can maybe get a 51 inch muffler there. I’ve had enough loud vehicles.

Not sure about the 6.7 but when I deleted my 6.4 I did a 5” straight pipe and it wasn’t loud at all, not like a Cummings, all you could really hear was the turbos.

May 19, 2019 | 04:05 PM

#21

StonedGrey

Laughing Gas

Joined: Jun 2018

Posts: 803

Likes: 103

Quote:

Originally Posted by Joe T

What’s the longest muffler I can put on in place of the dpf?

Is it straight?

Trying to see if i can maybe get a 51 inch muffler there. I’ve had enough loud vehicles.

If you leave the factory resonator in place and have a MBRP muffler, you wont or shouldn't hear it in the cab. I don't hear any drone. Outside the truck just sounds like a giant hair dryer. Lot of moving air sound but cant hear it in the truck.
i do have a dually so its a long bed putting the exhaust tip further away from the cab. But i doubt you will hear anything in the cab.

May 19, 2019 | 05:35 PM

#22

Joe T

Hotshot

Joined: Mar 2017

Posts: 10,172

Likes: 1,376

From: Chaz

Funny its the turbo ‘hair dryer’ sound I hate.

Chambered muffler fix that?

May 19, 2019 | 08:22 PM

#23

StonedGrey

Laughing Gas

Joined: Jun 2018

Posts: 803

Likes: 103

Quote:

Originally Posted by Joe T

Funny its the turbo ‘hair dryer’ sound I hate.

Chambered muffler fix that?

Theres no whistle or jet engine sound.
Its just the massive amount of exhaust exiting the pipe.
I cant hear it from in the cab unless the windows are down.
I don't think theres any way around the air swooshing sound. Pretty sure even with the stock exhaust it still makes close to the same sound.