From: Sonny Heath (sonny@defuniak.com)
Date: Sat Sep 17 2005 - 18:16:56 PDT
Thanks for the post Bjorn, I always enjoy them,
I have a question , Does offroad diesel have less lubricating qualities
than onroad diesel?
Sonny
----- Original Message -----
From: "Bjorn Brandstedt" <super_deuce@hotmail.com>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Saturday, September 17, 2005 11:14 AM
Subject: [MV] Biodiesel and the FDC
> Did some research for a future article on biodiesel and found this on the
> fuel density compensator:
>
> The FDC is actually only calibrated for the common fuels expected to be
> used in the multifuel engine, #1 and #2 diesel, kerosene and gasoline.
> Those fuels nicely fit the rule that a more dense fuel has a higher
> heating value. However, biodiesel does not. It is more viscous than #2
> diesel, but has a lower heating value. Therefore the compensator works
> against the purpose of adjusting the fuel delivery for a constant power
> output, it will decrease the fuel delivery when biodiesel is used.
>
> So if you are burning biodiesel manually turn up the fuel delivery for a
> comparative constant power output.
> In defense of the FDC, biodiesel has more oxygen and will provide more
> power because of it. One reference stated that biodiesel can produce more
> than 13% more power at full throttle (for an engine without an FDC)....
>
>
> _________________
> Bjorn
> MVPA 19212
>
> 1968 M49A2C modified. 1972 HIAB 765A crane and 1960 M756 pipeline truck
> bed.
> 11.00-20 NDCC singles.
> M103A3 trailer.
>
>
>
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