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Tractor Talk Discussion Forum

air charge cooler

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Big Hunter

06-24-2007 11:26:04




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the 190XT doesn't have a air charge cooler. wouldn't it run cooler, use less fuel, have more power, etc. etc. if it had a cooler. as it is the compressor to the intake is like 10 or 12 inches long.....this bugs me.




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4435

06-24-2007 21:12:41




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 Do it and tell us the details in reply to Big Hunter, 06-24-2007 11:26:04  
I need to put one on my old case just can't seem to find the time. Tom



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buickanddeere

06-24-2007 19:25:45




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 Re: air charge cooler in reply to Big Hunter, 06-24-2007 11:26:04  
Combustion chamber pressure is obtained from the heat of burning fuel. The greater the difference in the temperature of the gasses in the combustion chamber before combustion vs.after combustion.The higher the pressure. If the combustion chamber temp is increasing say as a very rough example.900 degrees from 300F to 1200F. Then all is well and the engine won't melt. Add enough fuel and increase the temp from 300F to 1400F with an inrease of 1100F, not good. So use an intercooler and drop the intake temp to 200F.Add the same amount of fuel and now the exhaust temp is 1100F. Now you can either leave it alone and send fewer oxides of nitrogen polution up the stack due to cooler combustion temps. This exhaust temp decrease without using EGR which drops combustion efficiency. Or you can add enough fuel so the difference is now 200F to 1200F. = "more power" witht the "same" max safe operating temp. A safe 1000F temp and therefore a greater pressure increase vs. a safe 900F temperature and less pressure increase.

Don't loose any sleep. The engineers at the factory using literaly millions of dollars of very accurate test equipment. They found the engine runs fine and doesn't overheat without an intercooler. And you get a cheaper tractor to purchase as there is no intercooler to buy.

Too cool an intake charge temp inder light/medium loads and combustion temps will be too low for clean combustion.

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low budget

06-24-2007 19:05:16




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 Re: air charge cooler in reply to Big Hunter, 06-24-2007 11:26:04  
I read somewhere that Deere found air charge cooling had a significant cooling effect on the engine when they were developing the 4620 and 6030 tractors.



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RodInNS

06-24-2007 14:02:12




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 Re: air charge cooler in reply to Big Hunter, 06-24-2007 11:26:04  
Yes, it can probably be made to run on slightly less fuel with charge air cooling, and probably lower the EGT's at the same time, if it's pushing enough fuel to need charge air cooling. That said, the general reason to add cooler is to get more power, which requires more turbo to push more air, and then more fuel.... which requires more engine below. That begs the question of whether the old Allis will stand more power. You may want an engine with/better piston cooling, larger wrist pins, stronger rods, and on and on....
If the tractor is leading the black smoke parade now, then more turbo and a cooler will probably help to lessen that problem, lower the EGT's, and make a bit more power on the same fuel.... but I doubt it will pay you.

Rod

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RAB

06-24-2007 13:52:07




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 Re: air charge cooler in reply to Big Hunter, 06-24-2007 11:26:04  
Don't know but there may be other issues to take into account. Sure it could make more power, but is there is a trade off of longevity? More under-piston cooling required. More stress on engine components? If your analysis leads you to the opinion that the engine could benefit from one, design and fit one (or borrow one from nother installation) if it is economically viable. Good luck.
regards, RAB

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