ThunderMax Timing vs. Temperature (Easy Method) User Manual
Page 2
Getting Started
First, establish if the spark knock is a new problem.
If the answer is “yes”, a timing adjustment is not likely
required to remedy the problem.
1) Check Fuel Pressure: Degrading rail pressure is the # 1 problem with new or sudden spark knock
problems.
2) Check Fuel:
To establish a good timing map
, make sure premium octane fuel is present; avoid use
of boutique fuel additives and stabilizers.
3) Avoid Special Rare Earth Spark Plugs: These can be a source of new unwarranted spark knock
which can alter the flash point of combustion.
4) Check for Damaged Wiring: Faulty or damaged o/2 sensor or wiring
Second, if none of the above issues are present or the spark knock problem has been present since
installation, determine the following:
1) Has an incorrect base map been selected? You can determine if the Base Map selected is
correct in the ThunderMax software. Select, sort and load another base map. Use the map
notes to aid in locating the proper map (Compression Recommendation). If you need further
assistance selecting a map, contact ThunderMax Support with the details of the engine
combination at
2) If you have determined the best matching map has been selected, timing adjustments need to
be made to the base map. The next step is to quickly identify the severity of the problem.
- Is the p
inging issue “Light”, “Moderate”, or “Severe”?
- Does the pinging happen occasionally, or at certain engine temperatures?
- What is the specific RPM range in which the ping is present?
Typical Adjustment Range
Slight or Occasional Ping: Retard 1 to 2 degrees
Moderate Ping: Retard Timing 2 to 3 degrees
Severe Ping: Retard at least 3 to 4 degrees
Perform the timing adjustments globally on the new Timing Vs Engine Temperature page. This is
the go to page for making a quick adjustment based on the analyses. Once completed, perform a
road test to confirm the issue has been resolved.
Unmodified Base Map (example)