Banks Power Chevy_GMC Trucks: Diesel ’82 - 93 6.2L Forced Induction- Sidewinder Turbo System (early-body) - Manual (Page 16)

use your pyrometer (exhaust temperature gauge) to
monitor your engine’s operation. at idle, egT (exhaust
gas temperature) 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 1050°f, with 1100°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 intake or exhaust system.
We recommend engine oil temperature be below
220°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.
16
CHECKING ENGINE pERfORMANCE
Your BanKs turbocharged diesel engine should exhibit
the following operating characteristics:
cruise conditions (constant 60mph on level road):
egT should be approximately 400°f; boost gauge, if
so equipped, should read 1 to 1
1 ⁄
2
pounds.
High Load conditions (uphill with heavy load):
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. 96291 v.3.0