Initial timing .vs. ECM timing
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Joined: Jul 1999
Posts: 317
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From: Chandler, TX
Car: Used to be an '87 IROC
Engine: 5.7l TPI
Transmission: 700R4
Axle/Gears: 3:23?
Initial timing .vs. ECM timing
I've been looking at my spark tables and find the advance numbers to be quite high. In my case, they range from 20.0 to 40.1 degrees! Do these values represent the amount of advance provided by the ECM in addition to the initial timing? If you set your initial timing to, say 10*, that would result in over 50* of total spark advance! That doesn't sound right at all! I have been under the impression that total timing should max out in the low-to-mid 30's.
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'87 IROC 5.7l TPI - original owner!
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'87 IROC 5.7l TPI - original owner!
Do these values represent the amount of advance provided by the ECM in addition to the initial timing?
I have been under the impression that total timing should max out in the low-to-mid 30's.
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theshackle
Tech / General Engine
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Sep 17, 2020 08:26 AM
