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Re: Re: Anyone ever added a turbo to a tractor?
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Posted by RAB on March 06, 2004 at 05:48:51 from (195.93.34.11):
In Reply to: Re: Anyone ever added a turbo to a tractor? posted by kyhayman on March 05, 2004 at 20:07:30:
Mainly true. May need a bigger main jet as well or maybe the adjuster would let enough in (not forgetting the gas engines). Suppose it might depend on how much/little boost, and where in the work range.
Adding a turbo does effectively improve power output without extra fuel. A diesel runs really lean anyway, but increasing the effective compression pressure would provide more combustion air (possibility of cleaner combustion) and at a higher temperature due to theoretical adiabatic compression. The useful work done by any fuel is increased by increasing the temperature and pressure differences (before and at the end of the working stroke), so laws of thermodynamics indicate the engine should run more efficiently ie a LITTLE more power for the same fuel.
Even though the exhaust gas kinetic energy, converted in the turbo, is 'free' there are other things like extra lubrication, extra loads on bearings, extra cooling required, etc etc which make fitting a turbo ineffective cost-wise without other changes.
For instance you could turbo a 'sea level' tractor for high altitude work (no, not flying!), but it is so much easier/cheaper to raise the compression ratio by milling the head!
Just a few cranky thoughts to muddy the waters and perhaps demonstrate that all sorts of things are theoretically possible, but not necessarily sensibly practical!!
Regards, RAB
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