Date: 3 Mar 2005 21:59:42 GMT From: Dave Hinz <DaveHinznospamcop.net> Subject: Re: Saab 9-3: What octane to tank?
On Thu, 3 Mar 2005 16:52:03 -0500, The Malt Hound <Malt_Houndnospamgt; wrote: > > "Dave Hinz" <DaveHinznospamcop.net> wrote in message > news:38pd13F5pfgtcU1nospamvidual.net... >> >> Makes sense, but no. No matter where the knock point is, it'll find >> it and set ignition and boost just short of there. > To elabarate, my understanding is that the knock sensors in most EFI > set-ups are able to sense the very early stages of detonation and > thereby prevent the damaging effects of pre-ignition. Yes. > The SAAB system of sensing using the DI unit is not clear to me, but > may offer an even better ability than the acoustic methods normally > used. http://www.vehicular.isy.liu.se/~larer/Projects/main.html ...explains it in more detial than you may care to read. Impressive engineering, to say the least. Dave Hinz
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