NGK will happily suggest a spark plug however due to the infinite options for modification, the onus is on the customer to test and ensure that each engine component is suitable based on the specific modifications performed.Įxample Take two identical vehicles for example a Ford 4.0L I6 Falcon.
The list for modifications and variations is endless and as such making a recommendation is not possible. For NGK to make a recommendation, the spark plug needs to be tested and certified for that engine. It is not possible for NGK to provide a recommendation for a modified engine. Depending on the modification will depend on the change in temperature profile. Spark plugs are designed to operate in a temperature range of 450 – 870☌, when an engine is modified (generally to produce more power which produces more heat) in turn the engine and subsequent spark plug temperatures increase. The most critical factor for a spark plug that needs to be considered when an engine is modified is HEAT RANGE. The two major factors that need to be considered when an engine is modified: Similarly, if an engine is modified, the spark plug needs to be appropriately changed as the standard spark plug may no longer be suitable due to the different characteristics of the engine. In this instance it would be unreasonable to blame the transmission manufacturer claiming the transmission was at fault. application, the transmission would most likely fail due to the higher power output of the V8.
(Once an engine is modified the engine’s characteristics are changed and as such each engine component affected by the modification needs to be considered and appropriately re-engineered.)Įxample If a V8 engine was fitted to a 4 Cyl.
Any engine modification in effect alters the engine characteristics and as such, it is the end users responsibility to ensure that every engine component that may be affected, is considered and redesigned if necessary. When an engine is designed by a vehicle manufacturer, thousands of hours of testing and design are dedicated to ensure that each engine component will operate to satisfaction across a variety of engine and environmental conditions. It is critical to note that once an ENGINE IS MODIFIED, THE RECOMMENDED SPARK PLUG listed in the NGK Spark Plug catalogue for that application MAY NO LONGER BE SUITABLE.
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