- Location
- Northumberlandia
Deffo go better if there is rain coming next morning & you must finish that field !!
No. Quite the opposite in fact. Engines have more power after they have warmed up from cold in the morning with a full tank of cold fuel. Modern tractors heat the fuel as they work and as fuel is used up and the level in the tank falls, the hotter it gets to a point. Fuel is injected by volume and hot fuel is expanded fuel and therefore contains less energy per squirt into the cylinder, hence the tractor is less powerful by late afternoon than it was in the morning.Has anyone noticed their tractors running better after 8pm in summer when air cools..... a local contractor said this earlier tonight
Yes, I think that was something to do with it. Water spray is heated as the fuel combusts and the steam produced is of greater volume that the water vapour -- or something like that -- which helps move the pistons.No it only injected water spray into the intercooler on the turbo
The turbocharger pressurising the air heats it up way beyond ambient air temperature to the point that ambient makes little if any difference, especially as the intercooler cools it down again to a lower temperature but still way above ambient. As long as the intercooler is not blocked with trash and is of an adequate capacity, the temperature of intake air should be fairly consistent with the amount of power utilised, not the ambient temperature so much. The harder the tractor pulls the higher the pressure and hence the temperature the turbo produces. Of course that is cooled by the intercooler and ambient air is the cooling medium but even so, the intake air of a hard working engine should be quite consistently within a small range. So the amount of air in the cylinders is not governed by ambient air but by the temperature post inter cooling which higher than ambient.Air density simple. Cooler the air temp denser it is more of it you get into the engine.
So the difference could be argued to be as negligible as your fuel temp explanation. Fwiw I didn't say there would be a performance benefit and tbh with modern engine management any differences there could be shouldn't be noticeable.The turbocharger pressurising the air heats it up way beyond ambient air temperature to the point that ambient makes little if any difference, especially as the intercooler cools it down again to a lower temperature but still way above ambient. As long as the intercooler is not blocked with trash and is of an adequate capacity, the temperature of intake air should be fairly consistent with the amount of power utilised, not the ambient temperature so much. The harder the tractor pulls the higher the pressure and hence the temperature the turbo produces. Of course that is cooled by the intercooler and ambient air is the cooling medium but even so, the intake air of a hard working engine should be quite consistently within a small range. So the amount of air in the cylinders is not governed by ambient air but by the temperature post inter cooling which higher than ambient.
I'd say it was a power thing, rather than an economy one. Many WW2 fighter aircraft used water or water/methanol injection in their piston engines. Such systems provided a significant boost to the engines power output but was only for emergencies (so called War Emergency Power) and could not be used for long otherwise engine life would be rapidly degraded. So one would think that an engine could conceivably have better power output in damp conditions, but that extra power would be at the expense of increased engine wear.Back in my teens I did a lot of hitch hiking. One old boy picked me up and claimed to be an inventor. He said that "water gas" added to fuel made it more efficient. He claimed that motors ran better in the evening because of the moisture in the air. He had invented a gadget to introduced water vapour into the fuel in a carburetor. I haven't a clue whether that is correct or not but I've remembered that old boy for nearly 50 years! Who knows? He reckoned nobody would take up his invention because they'd sell less fuel!
We often harvest till 10/11pm seeing as we rarely start before 11am damp reasons mostlyIf you’ve to work past 8pm your either lazy and haven’t started early enough or greedy. (Apart from a few harvest days on a wet year excluded)
Often there's not much day left by the time the dew has lifted, or ground or crop have dried after rain the previous day.If you’ve to work past 8pm your either lazy and haven’t started early enough or greedy. (Apart from a few harvest days on a wet year excluded)
Most of the idiots around here talk all day then start work at 8pm. Tillage is the only exception I get for working past it.Often there's not much day left by the time the dew has lifted, or ground or crop have dried after rain the previous day.
If you've got a block or field to finish why come back tomorrow ? Finish it while you're there !
Balls.If you’ve to work past 8pm your either lazy and haven’t started early enough or greedy. (Apart from a few harvest days on a wet year excluded)
surely the cooler the ambient air, the better the intercooler will workThe turbocharger pressurising the air heats it up way beyond ambient air temperature to the point that ambient makes little if any difference, especially as the intercooler cools it down again to a lower temperature but still way above ambient. As long as the intercooler is not blocked with trash and is of an adequate capacity, the temperature of intake air should be fairly consistent with the amount of power utilised, not the ambient temperature so much. The harder the tractor pulls the higher the pressure and hence the temperature the turbo produces. Of course that is cooled by the intercooler and ambient air is the cooling medium but even so, the intake air of a hard working engine should be quite consistently within a small range. So the amount of air in the cylinders is not governed by ambient air but by the temperature post inter cooling which higher than ambient.