[Diy_efi] Spark knock detection

[Ken Richardson]

Yes, we are using this exact setup on our race car. It works great, saved us
one engine for sure this season. We used the ESC module and sensor for a 350
Chev truck, it was the closest match to our application. We used a power
transistor to drive a big red warning light on the dash where the driver
will see it. When detonation occurs the light starts to flash. We would
never race without it now. Once this season we sucked a bunch of oil dry up
into the radiator, the car ran hot (220 degrees), about half way through a
heat race the light started to flash about 1/2 way down the straight. The
driver backed off the throttle a little and finished the race with no
damage.

Ken R.

----- Original Message -----
From: "Perry Harrington" <pedward at apsoft.com>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, September 10, 2002 4:36 PM
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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>


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