Forum > Engine Management
an electronic det can that works ~~~~NSFW~~~~
rawr:
I believe you i just want to see for my own curiosity>_>
Back of a speaker wont test g levels and youd have to pull some shit to test shock
nock:
--- Quote from: rawr on December 13, 2012, 09:50:18 AM ---I believe you i just want to see for my own curiosity>_>
Back of a speaker wont test g levels and youd have to pull some shit to test shock
--- End quote ---
i didnt even do that. just looking for a reason to post porn. havnt done it in a while, felt good.
92CXyD:
--- Quote from: nock on December 13, 2012, 10:16:08 AM ---
--- Quote from: rawr on December 13, 2012, 09:50:18 AM ---I believe you i just want to see for my own curiosity>_>
Back of a speaker wont test g levels and youd have to pull some shit to test shock
--- End quote ---
i didnt even do that. just looking for a reason to post porn. havnt done it in a while, felt good.
--- End quote ---
Well played :noel:
NoPistons!:
--- Quote from: nock on December 09, 2012, 05:20:17 PM ---You need it all. I'm usually screwing around on an engine dyno, and regular det cans just are not loud enough for that. I had actually started building a charge amp myself using the same chip as the hf stethescope. Anyhow I have done a lot of screwing around with this and there is a thousand bs write ups out there about building electronic det cans. I have tried most of them, this is far and away better. If you need (not everybody needs or even uses one) an electronic det can, this is better then anything else you can build. I'll try and post some audio of the different sensors and such. But I'm not sure that will show difference. Most of my old det cans, if I could hear them at all, knock sounded like rain on a metal roof, or marbles In a jar, or something like that. With this one it just sounds like knock and that's it, lifters sound like lifters, piston slap sounds like piston slap. Not guessing is good. To me it sounds just like a regular det can (bolt and hose style) just way louder.
--- End quote ---
Thanks for clarifying. I need something besides a wideband and datalogging to handle my shit. Switched my shit around and threw my knock sensor in a bin i have labeled "useless sensor shit i dont like." seems legit.
Danbob:
Sorry for dredging up an old thread, but it's a useful one!
I'm currently building a similar device but using a different brand of automotive stethoscope. I've two questions I'm going Nock or somebody who has also built one could answer.
1. Did you find it best to use a broadband sensor like the Bosch one! Or would using a tuned resonant sensor designed for that engine bore help filter out background noise?
2. What is the function of the 33ohm resistor? Where abouts in the circuit did you have to put it?
My PCB is a different layout so I cant follow the photo for reference. Would different value resistors suit different engine bores? Or is it not relating to that?
Thanks
Dan
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