[Diy_efi] Spark knock detection

[Ken Richardson]

True. The sensors are tuned to the engine.


----- Original Message ----- 
From: "Les Dittert" <lesd at earthlink.net>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, September 11, 2002 3:59 AM
Subject: RE: [Diy_efi] Spark knock detection


> I think highly engineered knock detection ( like GM does ) is tuned to
> the 
> spectral signature of the knock in the engine it was designed for. if
> you run 
> it on another engine, it won't know what it's 'listening for', for lack
> of better
> words.
> -Les
> 
> 
> -----Original Message-----
> From: diy_efi-admin at diy-efi.org [mailto:diy_efi-admin at diy-efi.org] On
> Behalf Of Perry Harrington
> Sent: Tuesday, September 10, 2002 12:37 PM
> To: diy_efi at diy-efi.org
> Subject: [Diy_efi] Spark knock detection
> 
> 
> Hello,
> 
> I was reading through my Corvette manual last night and came across an
> interesting tidbit.  The Corvette has a knock sensor situated on the
> right hand side of the block.  That sensor feeds to a box that has 4
> wires going to it.  The manual said that the ESC module sends a 10v
> signal to the ECU when everything is happy, but when knock is detected
> that 10v signal drops to ground.
> 
> Since there are only 4 wires going to the box, I'd assume power, ground,
> KS, and out.
> 
> This could be quite useful to the DIY crowd WRT DIY fuel injection
> computers.
> 
> I'm gonna look into this a bit more, since I've been looking for a knock
> detection mechanism for my 302.
> 
> --Perry
> 
> -- 
> Perry Harrington Data Acquisition &
> Instrumentation, Inc 
> perry at dainst dot com
> http://www.dainst.com/
> 
> Those who would give up essential liberty to purchase a little temporary
> safety deserve neither liberty or safety. Nor, are they likely to end up
> with either.
>                              -- Benjamin Franklin
> 
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