i'm burning B100 and still get dark black smoke with acceleration...doesn't seem right to me. could i be burning oil? i'm usually a little bit low after 3k (maybe a qt or so?). i also suspect i may have slight boost leak, but not sure... anyone?

 

It sounds like your just running really rich, check for a boost leak, tighten up your Starwheel and slide your AFC housing back. If that doesn't fix it idk what will. Oil burns w/ blue smoke, not black.

 

Biodiesel is still diesel, and when you don't have enough air for the diesel to burn efficiently you get the black smoke. The fact that it is BD doesn't make any difference. I run B100 all the time and I can still choke out a cloud that will stop multiple lanes of traffic if I want to.

Chris

 

im running B100 and i still get a puff of black smoke when i take off

 

Well this is an interesting thread.

I've never seen biodiesel smoke black.. Its always white just like burning wood.
When we start up the tractor, its a puff of white smoke.. Not black.

However, I'm not sure what effect any ratio of petrol would have..

 

My truck smokes black.But thats my heavy foot...

 

Watch a fire start , house , wood , paper , what ever , when first start , white smoke , not enough heat to burn , black smoke too much fuel but the heat is there .
Thats my theory & I'm sticking to it , until something better comes along .
Physics

 

black smoke is just the incomplete combustion products of fire, which is heat, fuel, and sustained chemical reaction. It just means that too much fuel is going into the cylinder, and not enough heat to burn it all. so it's burning just not as complete as if the smoke was mostly clear. And you really don't want to see white smoke unless your just starting up an engine. That's steam, one drop of water expands 1700 times it's size when it turns into steam(just thought I would put that in there) so there is probably just some H20 in the exhaust and it's turnin to steam. that seems to be your puff. hope it helps


And John maybe that's your somethin better!

 

Also what most people refer to blue smoke being burning oil is actually oil mist. If the oil actually burned it would behave much like the diesel fuel. Oil mist is probably sucked past the rings, valve guides or gets in through the turbo.

Edwin

 

My 99, with the shower-head injectors, smoke more white on initial startup, and while warming up, than my 96, and it's because the engine is not warm enough to burn the fuel efficiently, kind of like when the timing is set too low on the injector pump. It never did this until I put those huge injectors in there, but it's not a problem.
For Murphy2000, set your timing up a bit on the tractor if you get the white smoke all the time. I had a 1963 Ford 4000 that was always smoking a little white. I upped the timing a bit, to factory spec, and it never smoked white again, even on startup. The power was noticably better too.

Chris

 

Its just one quick puff from a cold start.. I don't think that's timing.

I've just never seen biodiesel create black smoke. Even if you just ignite it in a spoon it wont burn black.. Only white..

 

Aw shucks, I'll have to video my dyno run with my 96. I'm running homemade B100 in that now. You'll see some black smoke from that, although not much because it has small injectors in it. The dyno is June 30th. I'll try to remember.

Chris