| Author |
Message |
ned sanders (Uncle_ned)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, May 08, 2006 - 11:06 am: | |
Saw a nice FLEXABLE going up 321 from lenoir nc toward boone sunday afternoon. It was white and green. also must have had a 6v71 engine It shure sounded good lots of black smoke from dual exhausts.
It had a georgia tag. Love to see old buses out on the road.
Uncle ned
"huggy bear"
4104 |
Casper4104
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, May 08, 2006 - 11:30 am: | |
You bring up a good point Huggy, my fellow 4104-ophile. Let me ask a question that's been on my mind. Experienced busNUTS help me out here please,
I too love to see the old buses, but I hate to see the black smoke. I don't like to drive mine at night because I can't see my exhaust. As I understand it, black smoke means you're pouring in more fuel than she can burn - making smoke and wasting liquid gold.
When I see the black in the mirror I back off the throttle a little 'til it stops. Most of the time when I make soot it's time to drop a gear anyway.
Is this right? A good idea? Still learning how to drive the behemoth.
Thanks,
Casper4104
1958 PD4104-3103 |
ned sanders (Uncle_ned)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, May 08, 2006 - 3:39 pm: | |
my 04 smokes any time i have my foot in it.
this flexable was going up a very steep hill.
i have not figured any way not to make smoke out of mine going up hills.Just crusing down the road not much smoke.Of course i have a 6v92 with turbo and have to be easy on the throttle at start up at lights so i don't smoke every body out.
uncle ned |
Dallas Farnworth (Dal300)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, May 08, 2006 - 6:46 pm: | |
Ned!
Glad to see you back on line! How'd the races go?
You may be able to cure some of your black smoke by ressting your injector timing down a little. Like if it's at 1.484" drop it down to 1.460"
That may help.
Also make sure you have enough air inlet size. With the Turbo you'll probably need a bigger intake.
IHTH
Dallas |
John Jewett (Jayjay)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, May 08, 2006 - 11:19 pm: | |
Yes Casper, you are right about the unburned liquid gold. Most of us do the same as you mentioned. the taller the hill the worse it gets, 'til at some point (above 7Kft.?) it smokes all 'da time! Cheers...JJ |
FAST FRED
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, May 09, 2006 - 5:36 am: | |
Read the tags in the injectors to find out if it has been Hot Rodded with outsized de fuleing injectors.
Da Book will set you straight on what Should be there.
FAST FRED |
Larry Mackey
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, May 09, 2006 - 8:25 am: | |
Uncle Ned make sure that you are getting all the fresh air through the intake system,especially make sure the plenum air box(if this model GM has one)is clean.
The more air the less smoke!
Larry(whodat) |
Brian Elfert
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, May 09, 2006 - 8:40 am: | |
Even a new bus can smoke. Our local transit agencies have about 15 MCI D4500s for express service. Oldest one is maybe three years old.
I was behind one yesterday on a flat road and it started to pour out black smoke for a about 5 seconds. I was really shocked as a modern diesel rarely ever smokes like that unless it needs works.
Brian Elfert |
David Dulmage (Daved)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, May 10, 2006 - 10:45 am: | |
On steep or long hills I always manually downshift before the engine starts to lug. The automatic transmission doesn't downshift by itself soon enough.
DaveD
(MC-8) |