Performance RAMJET 502 Engine Manual Del Usuario página 11

Setting Initial Timing:
In order to change base timing on the system, the ECM has to be entered into the "service mode" using the diagnostic trouble code
tool, part number 12489400. The ignition control module (IC module), not receiving voltage on the bypass circuit from the ECM, will go
into "module mode". This can be accomplished by attaching the DTC tool to the data link connector on the wiring harness.
1. Turn the engine's ignition switch the off position (Engine not running)
2. Place the DTC tool's test switch in the off position and plug the tool into the data link connector on the wiring harness.
3. Start the engine, and place the DTC tool test switch in the on position.
The IC module will then go to base ignition timing. At this time, the base timing can be adjusted by turning the distributor. Using a
timing light, set base timing at 10° Before Top Dead Center (BTDC), and retorque the distributor clamp bolt. Turn the DTC off. The
DTC tool can remain connected to the data link connector in the wiring harness, as long as it is turned off.
Start-up and Break-in Procedures
1. After installing the engine, ensure the crankcase has been filled with 5W30 motor oil (non-synthetic) to the recommended oil fill
level on the dipstick. Also check and fill as required any other necessary fluids such as coolant, power steering fluid, etc.
2. The engine should be primed with oil prior to starting. Follow the instructions enclosed with the tool. To prime the engine, first
remove the distributor to allow access to the oil pump drive shaft. Note the position of the distributor before removal. Install the
oil priming tool, available from licensed partner
rotate the engine oil priming tool clockwise for three minutes. While you are priming the engine, have someone else rotate the
crankshaft clockwise to supply oil throughout the engine and to all the bearing surfaces before the engine is initially started. This
is the sure way to get oil to the bearings before you start the engine for the first time. Also, prime the engine if it sits for extended
periods of time. Reinstall the distributor in the same orientation as it was removed.
3. Safety first. If the vehicle is on the ground, be sure the emergency brake is set, the wheels are chocked and the car cannot fall
into gear. Verify everything is installed properly and nothing was missed.
4. Start the engine and adjust the initial timing (see above). Rotate the distributor counterclockwise to advance the timing. Rotate the
distributor clockwise to retard the timing.
5. When possible, you should always allow the engine to warm up prior to driving. It is a good practice to allow the oil sump and
water temperature to reach 180°F before towing heavy loads or performing hard acceleration runs.
6. Once the engine is warm, Double check the total advance timing is 32° at 4000 RPM if using the deluxe engine configuration.
7. The engine should be driven at varying loads and conditions for the first 30 miles or one hour without wide open throttle (WOT) or
sustained high RPM accelerations. NOTE: The ECM is programmed with a "Green Mode" that limits the maximum RPM during
the break-in period. From start up to the end of the first hour the limit is 4000 RPM, for the second hour it is 4500 RPM, and for
the third hour it is 5500 RPM.
8. Run five or six medium throttle (50%) accelerations to about 4000 RPM and back to idle (0% throttle) in gear.
9. Run two or three hard throttle (WOT 100%) accelerations to about 4000 RPM and back to idle (0% throttle) in gear.
10. Change the oil and filter. Replace with 5W30 motor oil (not synthetic) and a PF454 AC Delco oil filter. Inspect the oil and the oil
filter for any foreign particles to ensure that the engine is functioning properly.
11. Drive the next 500 miles under normal conditions or 12 to 15 engine hours. Do not run the engine at its maximum rated engine
speed. Also, do not expose the engine to extended periods of high load.
12. Change the oil and filter. Again, inspect the oil and oil filter for any foreign particles to ensure that the engine is functioning
properly.
13. Do not use synthetic oil for break-in. It would be suitable to use synthetic motor oil after the second recommended oil change and
mileage accumulation. In colder regions, a lower viscosity oil may be required for better flow characteristics.
Ramjet 502 Engine
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