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2001 Edelbrock Corporation
Brochure No. 63-0040
©
Rev. 11/01
Page 21 of 25
5.0 Ignition Timing and Nitrous (continuation)
5. What Happened? Did your vehicle go faster? Slower? What did the engine sound like? Did the nitrous
system work? Refer to the timing charts, and examine spark plugs for signs of detonation.
a. If power increased or vehicle mph increased and your spark plugs show no signs of overheating
or detonation, you could try to increase ignition timing 1 to 2 degrees.
b. If power increased or vehicle mph increased and spark plugs begin to show slight signs of
detonation - STOP! Do not advance timing further. You may choose to reduce timing 2
degrees at this point for an extra margin of safety. At this point, you need to look at the
troubleshooting chart on pages 22-25 for assistance. Pay close attention to the fuel supply with
your nitrous system.
c. If power decreases or vehicle mph decreases, check for a burned spark plug or engine damage,
and reduce ignition timing 2 degrees.
Please refer to the Troubleshooting section of this manual for help in determining any system trouble you
may feel that you are having.
6. Repeat step 5 until optimum ignition timing is obtained.
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TESTING CHECKLIST
Suggestions on how to perform accurate and repeatable tests with a nitrous vehicle:
1. Always use the same test route. A 1/4 or 1/8-mile timed drag strip is a good way to ensure test durations
never vary.
2. Always test with your vehicle when up to normal operating temperatures and operating conditions.
3. Ensure all vehicle systems and components are adjusted to proper settings (tire pressures, oil levels,
coolant levels, etc.).
4. Always verify fuel pressures and nitrous pressures are the same, every time you test the vehicle. Different
pressures will always yield different results.
5. Use all of your senses to determine how your vehicle is operating. Listen for detonation, watch your
gauges, smell for strange odors, etc.
When working with your ignition system, it is a good idea to have a service manual that features
your vehicle’s ignition system. It is also good practice to have a book that specializes on the
specialized techniques required when working with vehicular ignition systems.
Anytime you have questions or concerns with your Edelbrock Nitrous System, please call our
technical support hotline at 1-800-416-8628 before you start your engine.