Does EGT's affect a naturally aspirated diesel? Will high EGT melt down the pistion and low EGT cause wet stacking?

Just curious.

 

Yes.

Speaking of wet stacking: I used to work for a school bus contractor in the Chicago area. The buses were all IH, most of them powered by 6.9 and 7.3 liter IDI NA engines. In winter when the overnight low was forecast to be below zero, they would leave the buses running. In Illinois school buses can run red diesel. After a couple days of this, below the tailpipe of each bus there would be a stalagmite of reddish ice. That's wet stacking!

 

I had a stock 6.9 Ford F250 with a pyro, auto trans, the EGT would not get
very high not matter what the load. But if you turn the pump up you will see some high numbers.

 

Put enough fuel in them and egt's can be a problem. We have a couple of 2 cylinder John Deere diesels that will put a little fire out of the stack when your working them hard in the field around twilight. Now thats starting to get hot.

 

Thats more of what I was wanting to know, I should have specified in my first post. I want to know how EGTs affect tractor engines. I know quite a few peope back home that run the snot out of thier tractors. Just wondering if they would suffer from the same problem as well.

 

If someone turned them up then caution should be taken, the melting point of aluminum hasn't changed.
I have a 585 cu. in. minnapolis moline diesel at home that started to melt #1 piston, seized it in the bore and broke the bottom of the piston off. Result, new large ventilation hole in the block. Happened while blowing silage.

Tractors are setup to run at or near rated power all day, every day without engine damage under normal conditions.

There's no replacement for displacement. Don't expect the little 6BTA cummins to do what a Big Cam 400 will do all day.