Completing the Break-in Process
When you receive the engine, there is a short process to complete the break-in before it is ready to race.
1. Fully install the engine.
Install the glow plug and mount the engine in your vehicle as you normally would with the exhaust pipe, flywheel and clutch.
2. Start the engine on the box.
Place your vehicle on the starter box, heat the engine to 200 degrees Fahrenheit with a hair dryer or heat gun and start the engine.
3. Make sure the engine idles by itself.
Slightly lean the top and bottom needles so the engine idles without additional throttle input.
4. Idle a half of a tank.
Idle one half of a tank through the engine while keeping the hair dryer handy and monitoring the engine temperature regularly. Try to keep it close to 200F at all times.
5. Let the engine return to ambient temp.
Once you have idled a half tank, stop the engine and let it return to ambient temperature before continuing.
6. Repeat steps 2 through 5 three more times.
The goal is to heat cycle the engine four times on the box.
7. Run the engine on the ground or track under low power.
Again heat the engine to 200F before starting it. Tune the engine so that it is about two to three hours fat on the top and bottom. You don't want a full race tune at this point. While only using approximately 75% of the maximum throttle, run a complete tank through the engine while trying to keep the temp between 200 and 230F. Shut the engine down before it runs out of fuel and let the engine return to ambient temperature before continuing.
8. The engine can now be raced.
Heat the engine again to about 200F, start the engine. It should now be ready to receive a full race tune and be ready for a race.
We recommend always preheating your engine before starting, even after it has been run for several gallons. Preheating reduces stress from starting, helping to prolong the life of your engine.