From: Bjorn Brandstedt (super_deuce@hotmail.com)
Date: Sat Dec 18 2004 - 04:45:07 PST
Morning Frank,
Thanks for the pointers.
As you may or may not know, I converted my N/A multifuel to turbo several
years ago. I changed the timing, but did not alter the fuel delivery, so my
engine is actually getting less fuel (62 lb/hr) than the "from factory"
versions (64 lb/hr) of the turbo-multifuel (-1C and -1D). I have been very
satisfied with the increase in power, particularily at lower rpm's.
A pyrometer and a boost gauge was installed to monitor the "conversion". I
find it necessary to constantly watch the pyro reading in the hilly terrain
we live and drive in.
The boost hits 10 to 12 psi without much trouble when the engine gets loaded
down (as described in the hills). My concern is about the ease of exceeding
the critical 1,200 degree mark. I'm really curious about the standard turbo
engines, which don't have a pyrometer. When they are driven hard, how often
does the EGT exceed the safe temperature without the knowledge of the
driver. Those engines are fed more fuel than mine and could potentially get
even hotter, I guess.
There is one item that is different in the settings within the injection
fuel pump governor, the "smoke cam angle". Does anyone know the effect of
this gizmo? The setting for the N/A versions is 75 degrees and 48 for the
turbo. Mine still has the 75 degree setting. The fuel compensator is not
bypassed. I run on 10 to 25% kerosene during the winter.
I will check the calibration of the pyrometer in my truck to make sure it is
not at fault.
Thanks for reading my boring posts.
Merry Christmas and a Happy New Year!
Bjorn
>From: grntrks@juno.com
>To: super_deuce@hotmail.com
>CC: mil-veh@mil-veh.org
>Subject: Re: [MV] Driving with a load
>Date: Sat, 18 Dec 2004 01:41:00 -0600
>
>Bjorn,
>I just had my injectors replaced and had the fuel turned up on my "91
>F350 7.3 diesel. I now have much more power than before ( good ) but temp
>is now a factor. I cannot watch the speedo as before, but MUST watch the
>tach and temp guages, at all times. I also have to monitor the right
>mirror to watch for smoke. If I see smoke I am giving her to much
>throttle and have to back out of it until there is no smoke, or she
>overheats QUICKLY. RPM is also a major factor in keeping the temp down.
>Under a load here is the combination == lower gear, higher rpm, less
>throttle equals acceptable temp, but slower speeds
>I should note here that even though the fuel is turned up we did not
>exceed Ford spec limits. Fuel was at 92 ( from factory ) and is now at
>117. Ford limits are 90 to 120. The replacment injectors are also
>hi-performance versus the original factory injectors. The power
>difference is impressive, but there is now the temperature situation
>that absolutely must be monitored at all times when I'm pulling a load.
>I've had to "re-learn" my driving habits.
>
>Hope this helps you decide about turning up the fuel.
>
>P.S. My truck has a manual 5 speed overdrive transmission
>
>Frank Cox ' Nam 1966
>MVPA 14530
>'45 GMC 353 DUKW
>"On-A-Mission" hot shot trucking
>
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