[AT] Tractor Diesel Engine question - non-antique

[charliehill]

Grant, generally speaking it's just a question of reliability and longivity. 
The higher you turn the up the fewer total hours you get out of them and the 
percentage of pre-mature failures goes up.  Mostly it's just a matter of 
turning more fuel to the engine generally with bigger injectors and/or more 
pump pressure.  Sometimes their are came and valve changes.

Charlie


----- Original Message ----- 
From: "Grant Brians" <sales at heirloom-organic.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Saturday, February 20, 2010 6:43 PM
Subject: [AT] Tractor Diesel Engine question - non-antique


>I am hoping someone on the list (perhaps Mike Sloane?) can help me on
> understanding something on recent design Diesel engines. Every tractor and
> truck manufacturer of any size now has multiple versions of their diesel
> engines with different Horsepower ratings and Torque rating curves. 
> Clearly
> they are varying settings in the controls of the fuel systems and some
> versions might have a turbocharger or intercooling. What I am trying to
> figure out is when there is an engine that is NOT electronically 
> controlled
> (there are still some), what SAFE changes could an owner make to settings 
> to
> take advantage of the inherent capabilities of these units.
>     In particular, I have Perkins and New Holland engines that fit into
> these categories. In one case the nominal rating of the tractor is 78HP 
> PTO,
> but my unit was dyno tested when I bought it with 93HP from the factory 
> and
> others have "adjusted" these engines to get over 100HP PTO. I am also
> looking at possible acquisition of another tactor that has tractors in the
> same "family" using the same engine but with different adjustments that 
> are
> as much as 45% higher horsepower. These variants of the engine are all
> Tubocharged and Intercooled, so can a skilled and knowledgeable diesel
> mechanic change the settings?
>     Inquisitive people would like to know! I am not saying that I would
> make any of these changes, but I know that in the past when I have 
> converted
> OLD engines to better components that their performance has materially
> improved, sometimes yielding 25% more work.... Also, at times the fuel
> economy has gone up, but I know that would not happen in these newer
> engines. I do know this would void the no longer applicable warrantee on
> these engines if one were to perform the changes, but I still have a 
> burning
> curiousity.
>           Grant Brians
>
>
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