2016 ram 6.7 exhaust brake guestion

[Allen Arnette]

2016 2500 ram 6.7 stock. Is it a good idea to run exhaust brake all of the time to keep soot build up down

 

[SnoKing]

2016 2500 ram 6.7 stock. Is it a good idea to run exhaust brake all of the time to keep shoot build up down

Yes and saves brakes to boot. SnoKing

 

[kthaxton]

Yep, no reason not to use it all the time.

I am curious though, I always have heard that using it all the time helps keep the shaft that the moving vain slides on clean, but I also have wondered if it really makes a difference.....because doesn't the vain move the same exact way and distance in normal driving as boost varies? I've never had a VGT in my hands to play with to see if the motions are the same......but aren't they?

But again, definitely no reason not to use it all the time, and it sure is handy.

 

[SnoKing]

Yep, no reason not to use it all the time.

I am curious though, I always have heard that using it all the time helps keep the shaft that the moving vain slides on clean, but I also have wondered if it really makes a difference.....because doesn't the vain move the same exact way and distance in normal driving as boost varies? I've never had a VGT in my hands to play with to see if the motions are the same......but aren't they?

But again, definitely no reason not to use it all the time, and it sure is handy.

I think in normal operation it never moves to the same "closed?" EB position. Which makes sense. On cold mornings it moves to that position to help warm up the engine, but I do not think at other times it going there, except maybe at 60 MPH at over 6000 feet towing my trailer. Ha! Ha! SnoKing

 

[kthaxton]

except maybe at 60 MPH at over 6000 feet towing my trailer. Ha! Ha! SnoKing

Speaking of which.....I just dropped my truck off yesterday for the airbag recall, trailer brake TSB and I'm asking them to look into the lazy turbo issue again. We'll see if anything comes up. I feel like I gave better/more relevant details and I feel like I told them to somebody who understands what I am talking about. Fingers crossed.

 

[Cummins12V98]

Start truck, hit TH and EB buttons EVERY time.

 

[GSchlegel]

Except when it's slick out! On ice, don't use the exhaust brake unless you want to swap ends.

 

[kthaxton]

Oh yeah....there is that!

 

[Bob4x4]

As a rule the newer trucks do not have turbo sooting issues.The design was changed years ago and the software is also different

 

[y2k17ram]

I would think that when the butterfly closes and creates the back pressure, it would be more likely that there would be an increase of any soot at the turbo - all the way back to the cylinder and into the oil.

 

[SnoKing]

I would think that when the butterfly closes and creates the back pressure, it would be more likely that there would be an increase of any soot at the turbo - all the way back to the cylinder and into the oil.

No butterfly on new turbos. Sliding ring. Bob4x4's post above your is from a former RAM diesel tech. SnoKing

 

[Ram4Sam]

No butterfly on new turbos. Sliding ring. Bob4x4's post above your is from a former RAM diesel tech. SnoKing

Whaaaatt?? Bob retires???? No way......:-laf

Sam

 

[y2k17ram]

So - with the sliding ring... it's blocking the exhaust before the turbo? (instead of the butterfly after the turbo)

Still seems you wind up pushing all the soot and un-burned fuel into the oil, as well as soot buildup on the sliding ring. I've read several accounts of the exhaust break sticking... perhaps from all the crap from the exhaust piling up at the turbo.

 

[Prairie Dog]

I would think that when the butterfly closes and creates the back pressure, it would be more likely that there would be an increase of any soot at the turbo - all the way back to the cylinder and into the oil.

Nope, that doesn't happen.
In part because when the EB is on, your off the throttle and as was posted here a long time ago, injector duty cycle goes to zero. So in effect it isn't even running.

 

[Allen Arnette]

Thanks you guys for taking the time to reply. EB will be on.

 

[y2k17ram]

I know that just taking your foot off the accelerator doesn't shut the fuel off ... but what I hear you saying is that if the EB is switched "on", it does shut the fuel off...completely (until it is down to about 1000 RPM) - then restores a fuel supply?

Judging by the behavior & feel of the truck, my guess is that if it is switched to "auto", that isn't the case. It maintains some fuel when you're off the accelerator. I may be wrong, but the feel is almost like the EB isn't even there.

 

[Joseph Donnelly]

To elaborate on Bob's post, I monitor the vgt position with my Edge Insight. It is constantly moving as the software uses it to optimize boost vs. load and rpm. Therefore, there is no reason to use the exhaust brake for that purpose.

 

[SnoKing]

To elaborate on Bob's post, I monitor the vgt position with my Edge Insight. It is constantly moving as the software uses it to optimize boost vs. load and rpm. Therefore, there is no reason to use the exhaust brake for that purpose.

Other than it does not move to the full EB position unless it is in warm up mode or the EB switch is on. SnoKing