Banks Power Ford Trucks: (Diesel ’83 - 93 6.9 & 7.3L) Forced Induction- Sidewinder turbo system (Van) 6.9 & 7.3L - Manual (Page 19)

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use your pyrometer (exhaust temperature gauge)
to monitor your engine’s operation. at idle
exhaust gas temperature (egt) will be very low,
perhaps only 150°f. as the throttle is opened for
higher speeds and greater loads, the egt will rise.
the highest egt will be seen under maximum
load at full throttle, such as climbing a steep
grade with a heavily laden vehicle. use caution if
your egt approaches 1100°f, with 1150°f being
the aBsOLute MaxIMuM!
If the vehicle approaches those Egt levels under
these conditions, downshift the vehicle to reduce
the load, or back off the throttle. If frequent high
egt levels are encountered, the fuel delivery of
the injection pump will have to be reduced by
backing out the allen head screw in the injection
pump as indicated in the Pump Adjustment
section. a high egt can also be caused by a
restrictive exhaust system.
We recommend engine oil temperature be below
240°f, as measured in the oil pan, (an optional oil
temperature gauge is available from gaLe BanKs
ENgINEERINg). Optimum oil temperature is 220°F.
continuously high oil temperature is indicative
of the need for an additional oil cooler. If you do
not have an oil temperature gauge, watch your oil
pressure. falling oil pressure under a heavy load
is caused by rising oil temperature. use caution.
We recommend that coolant temperature, also,
should not exceed 220°F.
nOte: Because the oil pressure gauge sender
is now tapped into a different location on the
engine, your oil pressure gauge readings will be
slightly lower, although your engine oil pump
is still putting out the same pressure. Once the
engine has warmed up, take note of the oil
pressure at various engine speeds and use these
readings as your new standard for normal oil
pressure.
cHecKIng engIne peRfORMance
Your BanKs turbocharged diesel engine should
exhibit the following operating characteristics:
cruise conditions (constant 60 mph on Level
Road): egt should be approximately 400°f;
boost gauge, if so equipped, should read 1 to 2
pounds.
H i g h L o a d c o n d i t i o n s
( u p h i l l w i t h H e a v y L o a d ) :
egt should typically be 900 to 1000°f, with
1100 as a maximum; boost levels may approach
9 pounds.
It is important to realize that diesels, unlike
gasoline engines, run cooler with additional
air. It is impossible to run a diesel too “lean”.
exhaust gas temperature rises as more fuel is
added. turbocharging a diesel typically lowers the
egt. normal cruise condition egt for a normally
aspirated (non-turbocharged) diesel engine is
typically 600 to 650°f. as noted above, cruise
condition egt for a turbocharged diesel is typically
400°f. this lower egt translates directly to lower
piston and valve temperatures, and significantly
increased engine life.
It is also important to understand that
turbocharged boost pressures are load related,
that is the turbocharger makes boost only when
called upon to do so (by load requirements). the
turbo will not “make boost” with the transmission
in neutral, but makes boost proportional to the
load. Long uphill grades, with a heavy load, will
result in maximum boost. In other words, the
turbo makes boost only when it is needed. this
characteristic makes turbochargers so attractive
that the vast majority of long haul trucks and off-
road earth moving equipment are equipped with
turbochargers. turbocharging typically results in
more power and torque, better fuel economy and
increased engine life.
OpeRatIng cHaRacteRIstIcs
P.N. 96308 V.2.0