Originally posted by hetfield:
I did find some articles on google saying that DIS ignitions have no advantage besides being cheaper to make.


That is just not correct by any means.

I don't even know where to begin on that really.


Let's bring up 1 coil firing for every cylinder verses 1 coil for each cylinder. Thus eliminating the rpm factor in coil runoff.

That stands out as a serious improvement.


Maybe I should just say, "don't believe everything you read"
Do a little more in-depth research and you will be rewarded.


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As for the actual topic. Yes waste firing is used to help control unburnt hydrocarbons. Yes it is emissions related.

The only effect it has is reducing emissions and wearing out plugs faster. (Well catalyst longevity too) It has no performance implications: good or bad.

2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.