3406b pump mod help!!

Smoke is incomplete combustion.
Rich mix as far as I know.
I know for power it was common to turn the diesel up a bit so that you were a bit on the rich side rather than lean.
You can however reach saturation point where adding fuel actually cuts power.
For a lot of fuel you need a lot of air to get an effective burn.
Then you are just wasting fuel not to mention putting more carbon deposits throughout you motor and degrading your oil with particles and fuel.

 

With stock nozzles, there isnt a possibility of that happening, if he adds fuel and then does the other supporting mods he can get to a clean burn with the pump set to full tilt.

 

Puncher I guess you will find that anywhere you go. I must add there are alot of things KingQ says that I agree with. I see the logic behind his reasoning, but just because I'm differrant, I like to sometimes disagree.

 

flc120, drilling the replacement cover to 3/8" is just to remove any supposed restriction due to the original smaller passage.


And your thinking is wrong on the afrc, the manifold pressure is what pushes the diaphragm which pushes the rod (nailhead) forward which lets the forked lever iof the servo inside the gov move which utlimately allows full rack travel.

If diaphragm has a hole you have a little boost coming into the gov. Do what you want, I just don't see the point of having the afrc on there if it doesn't work, hence the replacement cover.

 

Think you two are talking about 2 different covers....

Cutting the end off the afrc allows not restriction to the governor or servo.

 

IMO you'd be better off to just carry a spare primer pump, it will come in handy one day.

 

There's also two little valves in the bottom of the primer pump some claim are restrictive or could leak air into the system. You don't need to drill the replacement cover but it won't hurt nothing.

I checked the link in my TDG post for the fuel preparator http://www.pureflowtechnologies.com/ and the site is changed. You used to be able to go there and find the install directions and tips for Cat engine and the pics info was there to drill the 6N4414 cover. I have a pdf I could email you flc 120 - pm me.