Thread: knock sensor
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nize nize is offline
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Join Date: Jun 2004
Location: seattle, washington
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Originally Posted by John at J&S View Post
Bob Boyer of Random EMS supplied Nize with his equipment. Bob programmed a Vipec ECU to reduce boost when the J&S is retarding from knock. He sent this data log showing the results. The orange trace at the bottom is the bargraph signal, the black trace is boost. I think the time scale is 0.1 seconds per division.
i should mention that the brand-new vipec EMS system designed by Random EMS is only one of two aftermarket systems i am aware of that has a 2-stage knock protection which;
1) retards timing, and if knock is still present
2) cuts boost

aside from the porsche factory system for the 951, the only other system i know of that has this two-stage timing retard+boost-cut knock protection failsafe is the Wolf EMS. both are available from here;
Random Engine Management Systems
'89 turbo-s (2.7, wolf3d ems, garrett dbb turbo, tial 46mm, etc. fast!)

Last edited by nize; 10-30-2009 at 10:04 PM..
Old 10-30-2009, 10:00 PM
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