Knowledge base
Spark plug heat range chart
NGK Technical · 2024-09-15
Medium reliabilityexternalmanual
Relevant excerpt
BR9ES vs BR8ES selection depends on sustained EGT. Above 620°C cruise EGT, prefer BR9ES to prevent electrode erosion.
BR9ES vs BR8ES selection depends on sustained EGT. Above 620°C cruise EGT, prefer BR9ES to prevent electrode erosion.