• Welcome to The Truck Stop! We see you haven't REGISTERED yet.

    Your truck knowledge is missing!
    • Registration is FREE , all we need is your birthday and email. (We don't share ANY data with ANYONE)
    • We have tons of knowledge here for your diesel truck!
    • Post your own topics and reply to existing threads to help others out!
    • NO ADS! The site is fully functional and ad free!
    CLICK HERE TO REGISTER!

    Problems registering? Click here to contact us!

    Already registered, but need a PASSWORD RESET? CLICK HERE TO RESET YOUR PASSWORD!

Going mechanical with a Moose Omega Marine IP

I received the Puff Limiter today and should be installing it Monday night. I took some pics but I thought a video might be more helpful so I did that too. Sorry about my lack of knowledge regarding the inner workings of a DB2, but it shouldn't be too difficult to figure out once the lid is off.


image.jpeg image.jpeg image.jpeg image.jpeg image.jpeg image.jpeg
 

Attachments

  • image.jpeg
    image.jpeg
    124.3 KB · Views: 5
FellowTraveler said:
Awesome indeed, what did that part set you back?
Click to expand...
It was about $300, which isn't cheap, but should be worth it. Obviously I can control the smoke show I put on yesterday, that's not the reason I want it. The reason I want it is the smoke show I put on when cruising 50mph in 4th gear with the converter locked up - a light roll into the throttle dumps a huge black cloud and I don't like that at all.
 
n8in8or said:
It was about $300, which isn't cheap, but should be worth it. Obviously I can control the smoke show I put on yesterday, that's not the reason I want it. The reason I want it is the smoke show I put on when cruising 50mph in 4th gear with the converter locked up - a light roll into the throttle dumps a huge black cloud and I don't like that at all.
Click to expand...
So, from what I can see it will stall fuel delivery until you have enough boost too burn the fuel better.
 
Burning oil said:
FT thats what it looks like.

How does it operate?
Click to expand...
Without knowledge of the internal workings of a DB2, I can't really say how it works. What it does in practice though is mechanically govern the fuel delivery of the pump until a pre-determined boost level is reached, at which time it allows fueling to resume normally. I really need to watch that video Dennis shared on Facebook to try to understand how the pump really works.
 
I just looked again at the drawing they provided and it looks like it's holding back the "Governor Linkage Attached to Fuel Metering Valve" before sufficient boost is applied. So I guess it holds the Fuel Metering Valve in a more closed position until the diaphragm releases it?

image.jpeg
 
Thats what it looks like. Wish I knew more about the internals also. I assume the throttle pedal is a separate fueling but the puff elim holds back the gov till boost lets it go.
 
There is very little info on the web by those who have used this device....I get that it is adjustable and there is some reference to the throttle feeling like lag before fuel is allowed to increase....if true a spool valve should work that out.
 
FellowTraveler said:
There is very little info on the web by those who have used this device....I get that it is adjustable and there is some reference to the throttle feeling like lag before fuel is allowed to increase....if true a spool valve should work that out.
Click to expand...
Zactly what I was thinking.
 
Hmmmm. I had done some reading but didn't hear that. If I don't like when it kicks in and out and can't adjust it correctly by screwing it in and out of the housing then I was thinking I'd use a manual click-type wastegate adjuster.

But hey, that's why I'm sharing - I'll install it and share how it works for me!

Actually thinking about it some more: I wonder if screwing it in and out just changes how much or how little it restricts fueling before activation (or more accurately DEactivatiom I suppose). Then if I don't like WHEN it deactivates I'll have to use a wastegate controller to make the boost signal hit the diaphragm when I want it to.
 
Maybe I missed something in a earlier post so don't get offended by my question please....

I don't understand why you would purchase a hopped up pump and then purchase another product to decrees the fuel ??

Too much smoke at lower boost??

I just don't grasp what you are working towards me thinks.... can ya maybe explain some for a old fart ....
 
sctrailrider said:
Maybe I missed something in a earlier post so don't get offended by my question please....

I don't understand why you would purchase a hopped up pump and then purchase another product to decrees the fuel ??

Too much smoke at lower boost??

I just don't grasp what you are working towards me thinks.... can ya maybe explain some for a old fart ....
Click to expand...
An aneroid limits the low RPM fueling until boost comes up. Once you develop enough boost to open the aneroid, then it will allow for full fueling. It's a smoke limiting device is all so you don't put so much fuel to it to black out the road behind you before the boost comes up.
 
Ferm said it. I will still get all the fuel the pump can make, when I have boost (airflow) and can use it. It simply limits the amount of fuel when boost is low and I don't have enough boost (air) available to burn all the fuel. Aneroids are actually factory installed on the Bosch pumps used on the Cummins engines, so it's definitely not a new idea.
 
n8in8or said:
Ferm said it. I will still get all the fuel the pump can make, when I have boost (airflow) and can use it. It simply limits the amount of fuel when boost is low and I don't have enough boost (air) available to burn all the fuel. Aneroids are actually factory installed on the Bosch pumps used on the Cummins engines, so it's definitely not a new idea.
Click to expand...
Mercedes & lots of big rigs use them too.....truth be told you'll never get that amount of fuel from any DS4 pump, you now have pedal control as opposed to drive by wire. From what I've been reading the device will yield better mpg's off boost too....
 
The only increase in mpg's will be from it not pouring the fueling to it with throttle changes. It still takes a certain amount of fuel to deliver the needed power to push a vehicle a given speed. A fuel limiting device will simply keep it from delivering the fuel as fast. And I know somebody who found a way to get larger plungers in a ds4 pump, but he hasn't found a shop willing to touch it to try and set it up. Unlike the db2, the ds4 would also probably require custom tuning if you put larger plungers in to increase fueling, and then theres always the question of can the ds4 internals handle pushing larger plungers for any length of time.
 
You must log in or register to reply here.
Back
Top