No Smoke Ever

[jthomass]

I have noticed since installing a used 7.3 with approx 60K miles there is never any black smoke. I can be pulling about 6K lbs up an incline with the throttle floored and never any smoke.
Am I not getting enough fuel? Should my IP be adjusted?
Thanks

 

[SKimballC]

I'll tell you how I got some more smoke...

I washed my mirrors
No turbo? Unless you have a pyro I won't tell you to turn the pump up. Gotta be careful.
I don't know why some people want more smoke. I usually want less, except when I have people on cell phones in little imported cars under the back of my truck where I can't see 'em.

 

[jthomass]

I'm not looking for smoke just for the sake of smoke. I simply am wondering if I maybe short on fuel since I never see any smoke?? Or is no smoke a sign that it is adjusted properly??
Thanks

 

[sle2115]

Mine makes very little smoke as well. If I have it really loaded, going really slow with the go pedal matted, it will spew a little, but not much. Mine runs too good to change it, so I think it is where it needs to be. I am sure I could add more as it never gets dangerously hot on the EGT, but it works as it.

 

[hoodshauler]

Black smoke is a sign of incomplete burning of fuel. As long as it is pulling fine and you dont have i pyro I would leave it alone.

 

[jthomass]

Thanks for that info guys: As far as pulling goes does the following scenario sound about right for an IDI or a little off??
Pulling around 5K pounds at 75mph and start up gradual inclines I stay in 5th gear with the pedal on the floor and am losing mph as I climb.. The inclines are not real extreme and the truck has 4.11 gear ratio.
Should I have the power to maintain 75mph in high gear on a slight hill?
Thanks again.

 

[sle2115]

Thanks for that info guys: As far as pulling goes does the following scenario sound about right for an IDI or a little off??
Pulling around 5K pounds at 75mph and start up gradual inclines I stay in 5th gear with the pedal on the floor and am losing mph as I climb.. The inclines are not real extreme and the truck has 4.11 gear ratio.
Should I have the power to maintain 75mph in high gear on a slight hill?
Thanks again.

NO
I am NA, but only have a 4 speed, I can't do that in 4th. gear unless we are talking totally different grades, then again, if I hit the grade at 75 it would most likely be a downhill grade!!! Really, mine will start to slow on anything but a short grade where sheer momentum pushes me over it.

 

[wgargan]

Thanks for that info guys: As far as pulling goes does the following scenario sound about right for an IDI or a little off??
Pulling around 5K pounds at 75mph and start up gradual inclines I stay in 5th gear with the pedal on the floor and am losing mph as I climb.. The inclines are not real extreme and the truck has 4.11 gear ratio.
Should I have the power to maintain 75mph in high gear on a slight hill?
Thanks again.

On an up hill!! I cant even do that on the flats. I usually tow in 4th.

 

[reklund]

Mine will pull 70 with about 5K in tow, but it doesn't like it. EGT's climb quickly, even with the IC and a free-flowing exhaust.

Sounds like you might start by checking your timing, before you crank up the fuel...

Ryan

 

[TomA]

My theory on the 5 speeds, most particularly related to the transmission eating Cummins is as follows: Shift to 4th at the earliest possible moment and pour on the coal. Don't even try to pull a hill in 5th. 4th is direct drive straight through the transmission and can take all the power the engine can put to it. 5th is actually a fairly strong gear, I think the weakness is in the lower gears, but I would never pour on maximum coal in any gear but 4th.

 

[Agnem]

Timing plays a big factor in getting smoke. Chances are, your retarded. Well, I mean your truck anyway.

 

[Dsl_Dog_Treat]

Plus don't forget the new ULSD fuel is cleaner and I've noticed less smoke when standing on it.

 

[Agnem]

Add some WMO. That will fix it!

 

[sle2115]

Timing plays a big factor in getting smoke. Chances are, your retarded. Well, I mean your truck anyway.

Well, my truck is a Ford, so I know it is retarded!!! (he started it)

Bought a 1480 Lumy/mag II on Ebay. Hope to get it soon and I will let you know. If timing is retarded, I will hate to see how it rattles cold with any more advance, not to mention, it has no problem pulling a load now, just doesn't do it fast. My neighbor who pulls 6.9's took a look at mine and said timing was dead on, prolly trust his ear more than the meter, so we shall see.

 

[sle2115]

Plus don't forget the new ULSD fuel is cleaner and I've noticed less smoke when standing on it.

Same here, I used to get a about twice as much smoke when loaded and standing on the go peddle with both feet, now I just get a little. Have threatened to "adjust" my pump, just never have.