hey guys,
i've heard about detonation cans a lot lately...
so i started searching.
two common cheap DIY methods have sprung up.
one is the copper pipe bolted to the block, with a flexible plastic hose run all the way to a set of ear-muffs. the ear protectors found at shooting ranges.
the other is electronic. a knock sensor is basically a microphone right? so how can you control the signal and have it play through earphones??? here's how:
http://autospeed.com/cms/article.html?&A=0353
opinions?