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Old 02-17-2013, 03:16 PM
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DIY Detonation detector

and amplified engine ears ( part II)

I built these simple low cost but effective engine ears using similar stuff as the article shows, that I sourced from Radio Shack, here. They work. Clip the mic to a bolt or...on the side of the engine block near the frost plugs.

AutoSpeed - DIY Detonation Detection - Part 1
AutoSpeed - DIY Detonation Detection - Part 2

reference Radio Shack PN 33-1096
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