[Diy_efi] boosted compression ratio

[Nick Starai]

> Interesting, ? Can you elaborate on your knock sensor relationship to
> which individual cylinder retard is managed - or do I infer you have
> multiple knock sensors...

It's made by J&S Electronics, called the SafeGuard. It only uses one
sensor.

> ie. If you have one knock sensor - how do you know which cylinder
> to retard by how much - especially at higher rpms, is there a low
> rpm cutoff for this algorithm ?

I'm not exactly sure the processes it uses, but it is proprietary and
supposedly a very complex algorithm. It is disabled at under 1500 RPM as
you expect. The display shows which cylinder it is retarding, and by how
many degress. It can pull up to 20 degrees per cylinder. Their webpage:
http://www.jandssafeguard.com/tech.html

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