Flame out stack ?

[1965LONEWOLF]

Whats it mean when you see the pulling trucks or non - turbo charged old tractors with a little flame coming out the stack ?

Is not enough fuel , not enough air , timing ?

 

[rbattelle]

Burning in the exhaust manifold means combustion wasn't finished inside the cylinder. I'd suggest in the case of a diesel it's caused by a rich condition combined with very high exhaust manifold temperatures (high load).

-Ryan

 

[timelessconstructionllc]

in my case it's caused by propane injected directly into the bottom of the stack via a high pressure regulator connected to a brake line. Sorry, i had to chime in. not trying to hijack the thread but if anybody has any insight into getting the propane ignition system to work (overcome the exhaust when trying to light initially, please pm me.

 

[Gonzo 1066]

A typical diesel puller has lots going on to make 10x the power of a stock engine. Besides big RPM and valve timing. LOTS of excess fuel and a huge volume of air are going through the engine. You have to realize that the turbo need HEAT to build boost in the manifold. SO the excess fuel goes through the engine, part of it unburnt (this helps cool the pistons so they don't melt) and as it goes through the turbo the continued burn of the mix expands to help drive the turbo Much faster than in a normal fueling state. You would actually be surprised to see how hot your exhaust is on your stock truck when it is pulling. Your exhaust manifold DOES glow a dull cherry red when you are pulling hard, If you had a short upright stack you would see some fire on a hard tow. . Hope this clears things up. .

 

[1965LONEWOLF]

So its not really hurting anything a a 200' track

water temp was 190

 

[Gonzo 1066]

IF your engine is basically stock, AND if your tires are a street legal tread. And if you have a strong enough hitch, AND if the sled operator knows how to operate the sled safely and sanely. No, pulling on the track does not hurt your engine. I have seen lots of driveline failures on the track. The most common issue is the rear differential input shaft-and universal joint on lifted trucks. The next in line is the transfer case or transmission. 190 degrees engine temperature is not even warmed up to full operating temp. IF you really want to know how your engine is handling a hard pull you MUST have a pyrometer. This is a real gauge of how close to damage your engine is.

 

[1965LONEWOLF]

Its in a old antique tractor i restored,non turbo but rebuilt really well ,

it runs really strong,only have two runs on it and i think it having a small flame out the exhaust is ok but just want to be sure, hate to change anything because it ran so well but don;t want to hurt it either

 

[SDrake]

Grew up on farm with many hours pulling disk at night. Loved watching the glowing manifold and flames out the exhaust of a John Deere in the hard pulls.

 

[1965LONEWOLF]

But is it hurting the anything ? My manifold is not glowing or anything ?

 

[rbattelle]

I doubt you're hurting anything. Maybe over time you could burn the exhaust valves, but that's an easy repair.

-Ryan

 

[1965LONEWOLF]

Everybody thins i 'm running a turbo or nitro or something , its just in the timing

 

[1965LONEWOLF]

This is a non turbo tractor , when i leave the line its fine but when she get heavy the tire speed slow down but she pulls like a *******, i have the pump turned up and i turn it around 2000 rpms, but when she pulling hard she's got a 4" flame out of the stack, my stack is only 18" tall but what i/m trying to is get rid of the flame - guys in the tractor class are crying about the flame- what can i do to get rid of the flame ? Would a longer stack work ? Putting something in the fuel work ? Let me know

 

[cerberusiam]

guys in the tractor class are crying about the flame-

I would suggest handing out travel packs of Kleenex tissue to mop up the tears.



If its not hurting things and you are legal for the class, let them cry.

 

[1965LONEWOLF]

I am,i did my homework and restored the biggest motor/tractor combination i could find to get in the class, now they *****, would like to get the flame to go away - would a longer stack do it ?

 

[cerberusiam]

would like to get the flame to go away - would a longer stack do it ?

Not sure. Since the flame is likely the result of unburned fuel hitting the atmosphere and being hot enough to combust, all it is likely to do is move the flame higher.



Its just a normal occurence when you run it thru a short pipe under a hard pull and feeding it all that fuel.

 

[timelessconstructionllc]

If your stack is 4 inch just cut about a foot off of it and put a 6"-4" reducer then a piece of 6" about 2 1/2' long and I bet you wont notice the flame anymore. You can get all parts at fleetoride, truck pro or a place of that nature