Ping Detection Kit Made < 20 Dollars

[180bfj20det]

OK,

Made up an "engine stethescope" which is just a hearing aide for the elderly which I bought from dicksmiths for like 12-13 dollars. Removed the mic, extended it and attached (glued) it onto a clip which I place onto the engine's block. This has been detailed before on some internet site, cant remember which it is, but someone should know if people are interested or I could take pics and show you.

Anyway, it works very well. You can hear everything that is going on. However, since I havent had it on a high performance engine yet taken to the limits, I have not heard pinging. I dont think Id be able to advance the ign timing enough on a hilux ute to hear pinging (or would I)?

OK, now, people who use this method of detecing pinging on the block with a microphone, dont you find that general engine noise will "flood" the mic with its noises? In opposite respect, attaching a copper tube bolted onto the block which is subsequently t pieced to a hose and plugged into your ears seems to be a better way since the plastic piping will not detect and amplify general noise, youll just hear block noise (see http://bagpuss.swan.ac.uk/horsham-developm...detonation.htm).

So is the mic method any good? Im just scared to miss the pinging and let it go boom.

Cheers

[Kennedy]

OK,

Made up an "engine stethescope" which is just a hearing aide for the elderly which I bought from dicksmiths for like 12-13 dollars. Removed the mic, extended it and attached (glued) it onto a clip which I place onto the engine's block. This has been detailed before on some internet site, cant remember which it is, but someone should know if people are interested or I could take pics and show you.

Anyway, it works very well. You can hear everything that is going on. However, since I havent had it on a high performance engine yet taken to the limits, I have not heard pinging. I dont think Id be able to advance the ign timing enough on a hilux ute to hear pinging (or would I)?

OK, now, people who use this method of detecing pinging on the block with a microphone, dont you find that general engine noise will "flood" the mic with its noises? In opposite respect, attaching a copper tube bolted onto the block which is subsequently t pieced to a hose and plugged into your ears seems to be a better way since the plastic piping will not detect and amplify general noise, youll just hear block noise (see http://bagpuss.swan.ac.uk/horsham-developm...detonation.htm).

So is the mic method any good? Im just scared to miss the pinging and let it go boom.

Cheers

Best to fix the mic to a radiator/coolant line as the coolant does run through the block. The pinging will travel up that line but will also eliminate alot of background noise. Good Luck

[Cubes]

Interesting...

Post picks.

[sky30]

I have been looking at making one of these also, seen it in a article on Autospeed.

Post pics, what batteries does it use??

[RANDY]

More pics, although it's a very old.

http://autospeed.drive.com.au/cms/A_0353/article.html

[gtst25]

Getting the old hilux to ping won't be a problem. Anything will knock if you advance the ignition enough - I've had some old heaps of junk over the years and all have pinged.

Cheers

[MattSR]

SydneyKid made a good suggestion to me once - attached the clip to the boss that the knock sensor screws into.

It makes sense - its right near the combustion chamber which is where knock occurs.