> Hello everyone, > > I have a curious question for the group. Last night I put my first > B100 in the tank. I have been running commercially produced B10 for > about a month. The B100 is homemade. > > I have a two-tank truck. I ran the front tank down pretty low, added > 3 galloons B100, so i've probably got B80-B90 in the front tank. Rear > tank is B10. I warmed up the engine, then switched to the *B100*. The > freeway headed down a hill. Soon as we head down hill the truck > starts smokin like I've never seen. It was pretty thick blue smoke. > The truck seems to let out a belch of smoke everytime I put in the > clutch or head down hill. The smoking is not continous, little puffs > come out at random times. I switched back to the B10 and the smoke > seems to have died down. > > My first thought was "Oh that's just the biodiesel cleaning out the > gunk". But i would expect that to clog a filter, not smoke. > > Any thoughts on what is going on or how I should proceed? > > Thanks, > Steve > My thought is that blue smoke is usually caused by 1 of 3 things 1) Oil being burnt, blowing by teh rings or valves 2) Timing too far advanced or too far retarded 3) Engine too cold I will assume its not #1. You'd have noticed that on B10 or petrodiesel also I lean towrad #2. Biodiesel has a higher cetane rating than petrodiesel. Timing is set according to cetane content. I would also think its not 3, not at least if your engine temp is in the right range. We'll assume its timing then, but thinking about cetane always gives me a headache. I can't remember whether timing should be more retarded for higer cetane or more advanced. I do know that many environmentally conscious individuals suggest retarding the engine's timing 2-3* to overcome BD's higher cetane, so I guess you're probably too far advanced. I would suggest getting the timing done on the fuel you want to use most of the time at a good diesel shop unless you have a timing tool yourself. First lets find out what type of engine this is. You say it has dual tanks, so I'm assuming its a Ford F-series. Is it a powerstroke, a 6.9 or a 7.3 IDI? With the IDI, you could retard teh timing a dime's thicknessor two and see if it makes a difference. If its a PSD, you'll need to let the pros handle it since its computer controlled. On an IDI, you loosen the 3 injector pump mounting bolts and rotate the pump itself. Be advised, you won't get much movement out of it, just a hair, but a little makes a lot of difference. BTW, you rotate it toward the driver's side to retard the timing and toward the pass side to advance it. I think its timing. Look into it. J.D. > > > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Biofuels list archives: > http://infoarchive.net/sgroup/biofuel/ > > Please do NOT send Unsubscribe messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > Yahoo! Groups Links > > > > > >
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