Thread: knock sensor
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John at J&S John at J&S is offline
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Join Date: Dec 2005
Location: GARDEN GROVE, CA
Posts: 147
Any of the SoCal guys know Rick Hearn? I had forgotten his name until I spoke with Greg Brown of Precision Motorworks in Anaheim today. He remembered doing the install of our system on Rick's 911 back in '91. This was our first magazine test, can't remember the issue.

Rick was an engineer at Calcomp and had reverse engineered the Motronic chip. He programmed one with more spark and less fuel and ran it when he went racing on the weekends.

If the unit was retarding inappropriately, it would have shown up in poor or inconsistent lap times.

James Sly was a technical writer for European Car at the time, and he told me Greg went through the engine three years later. Greg told him (paraphrasing) without the knock controller, there was no way the engine would have looked that good running Rick's chip.
Old 05-08-2008, 06:21 AM
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