Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

PCM Speed

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Old Apr 19, 2004 | 07:36 PM
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94formulabz's Avatar
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From: PA
PCM Speed

Does anyone know how fast the stock PCM samples data from the sensors and runs calculations?

The way I see it the stock PCM is limited to 7000 rpm and it can control spark in 1 degree increments so it may be performing at:

7000 rot/min X 1min/60sec X 360 calculation cycles/rotation = 42000 cycles/sec = 42 MHz

Although it could be somewhat less in its calculations and still control the spark to a finer degree. If anyone knows any actual data on this, or has any comments I'd appreciate it.

-Brent
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