[Diy_efi] Spark knock detection

[Les Dittert]

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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