Knock sensing and retarding ignition

[Stephen Webb]

> I've been reading the posts about knock sensing and retarding the
> ignition. Now I am wondering, would it be possible to build a
> simple,cheap device that would retard ignition as boost rises on a
> turbocharged engine. I know MSD makes such a unit, but i think it is
> much too expensive.

I've looked into it a bit.  With a MAP sensor, an inexpensive PIC
microcontroler, and a few other parts you should be able to do it for less
than $30.  For a one off type of deal, though, spending the money on the
MSD unit may be justified.  The real win would be if a group of people
could benefit from the design (ie make it freely available to the list /
public).

-Steve


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