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Coyote Series Engines
spark plug gaps for coyote
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<blockquote data-quote="twistedneck" data-source="post: 12764557" data-attributes="member: 130159"><p>Using the stock plugs - Motorcraft sp519 iridium. one set gapped at 0.035 the other gapped at the factory setting - 0.049 to 0.053. I run a 93 tune w/ headers and the usual mods.</p><p></p><p>With the tight plugs I was thinking that 0.035 was too tight to get good efficiency and burning since its basically a stock boss engine w/ cj cams. so I put in the big gap factory set.</p><p></p><p>First thing I notice? It takes a good second longer to fire up the car here in 10F Michigan cold weather.</p><p></p><p>should I re-gap these down to 40 or 45?</p><p></p><p>edit: I just started it after sitting in the cold all night, its 23F now. it actually struggled to start but it started after 2 seconds. drove it around for 35min to warm it up, then tried to start it again and it fired much quicker.. fired up normally. </p><p></p><p>Thanks!</p></blockquote><p></p>
[QUOTE="twistedneck, post: 12764557, member: 130159"] Using the stock plugs - Motorcraft sp519 iridium. one set gapped at 0.035 the other gapped at the factory setting - 0.049 to 0.053. I run a 93 tune w/ headers and the usual mods. With the tight plugs I was thinking that 0.035 was too tight to get good efficiency and burning since its basically a stock boss engine w/ cj cams. so I put in the big gap factory set. First thing I notice? It takes a good second longer to fire up the car here in 10F Michigan cold weather. should I re-gap these down to 40 or 45? edit: I just started it after sitting in the cold all night, its 23F now. it actually struggled to start but it started after 2 seconds. drove it around for 35min to warm it up, then tried to start it again and it fired much quicker.. fired up normally. Thanks! [/QUOTE]
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spark plug gaps for coyote
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