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ECM and Wiring Harness Installation:
The wiring harness included with the RAMJET 502, part number
EXHAUST BUNG
88961968, will need to be installed. To ease the installation, all of the
connectors have been labeled to identify which component each mates
with. This harness installation requires a B+ connection and a fused
ignition source. A tachometer output lead is also provided. This fuel
OXYGEN SENSOR
injection harness is protected additionally by 3 mini fuses in a waterproof
connector in the harness. Circuit protection of the B+ feed in the form of a
fusible link is advised.
Among the items contained in this kit is an oxygen sensor. The oxygen
sensor will monitor the exhaust gas and determine the level of richness
or leanness of your engine. It will monitor the aggressive, performance
oriented fuel tables in the ECM and trim them ever so slightly in order to
optimize performance and driveability. This trimming allows you to operate
at a maximum level of efficiency and thereby improve both driveability
and fuel usage at the same time. In order to install the oxygen sensor in
the exhaust, a weld-in exhaust bung has also been included in this kit. An
oxygen sensor and exhaust bung as shown in Figure 1.
FIGURE 1
Another item in the kit is an intake air temperature sensor. This sensor
acts much like a jet change that you might make on a race engine
INTAKE AIR TEMPERATURE
carburetor at the drag strip. Normally you might increase jet size when
(IAT) SENSOR
the temperature rises. This sensor takes the temperature of the inlet air
and makes those "jet changes" electronically to the ECM fuel tables in
order to optimize power output and get the best fuel mixture for improved
performance and economy. An intake air temperature sensor is shown in
Figure 2.
Installation of the exhaust bung requires welding. If you do not have the
required equipment to install the exhaust bung, a qualified local muffler
shop or service garage should be capable of completing this step for you.
FIGURE 2
88962910
7
54
Ramjet 502 Engine
IR 17FE14
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