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I went to the MSD website and found their tech forum. Here's what a search turned up (posted by msdtech16):
"These examples are just starting points to get you going in the right direction. Every application is different and should be tested and tuned:
Compression Spark Plug Gap
Up to 10.5:1 .050 - .060
10.5:1 – 13.0:1 .040 - .050
Above 13.0:1 .035 - .045"
I think I'm using ~ 0.050" on my 2.7RS engine.
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Jim R.
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