Quote:
Originally posted by xcel@Apr 22nd 2004 @ 6:46 PM
The only time your mileage would be affected under a timing issue is when you are into the accelerator hard and the KS were to pull back your 1.3 L’s timing.
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Wayne,
Thanks for the info....but...
I always thought that cars advanced their timing automatically on acceleration.
Didn't older cars have aftermarket advance kits? You know; different weight sizes and spring strengths for different advance stages / RPM range based on centrifugal force...
I've never heard of a KS, but I think the timing must be advanced in order to keep from having the lower octane gas fire prior to intended ignition. This is referred to as pre-ignition or pinging.
It is my understanding that because lower octane gas has a lower firing temp and compression stability, that it would be more apt to burning over a wider timeline of the compression stroke therefore resulting in "less efficiently".
I may be wrong, but I think that's the way I understood how ignition timing affects pinging and the burn cycle of a compression stroke.