See Through Spark Plug

[Vintage Engine Repairs]

I made a see through spark plug with the intension to see the flame front change colour and get a visual rich vs lean (orange vs blue) flame, rather than just an audible one.

 

[82F100SWB]

Man I haven't thought of an Colourtune plug in many years, but you've essentially built yourself one there.

 

[Philbert]

‘Brilliant’

Philbert