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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
SP542 Thread
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<blockquote data-quote="New Nick at JDM" data-source="post: 1400202" data-attributes="member: 33540"><p>I am not 100% sure on build dates but I know certain 2018's have them.</p><p>I've had a few customers we sent 550's to, only to note that the plugs installed are in fact 550's</p><p>I think it was 534's that were in these trucks in the beginning, but again I am not 100% sure. Also SP-550's are no longer factory as well. I think currently the SP-580's are factory?</p><p></p><p>It gets confusing as it seems some of the spark plug coding in the complete part numbers from Ford is not commercially available to the public.</p><p></p><p>For example, the SP-542 identifies as CYFS-092-YPT and the SP-578 (the now debunked 542 replacement as it is not identical) is CYFS-12-YPT</p><p></p><p>The first and sometimes second number (09) as with the SP-542 and (1) with the SP-578 is the heat range of the plug.</p><p>0 in front of the 9 with the SP-542 denotes "extremely cold." The 1 with the SP-578 designates "cold"</p><p>The last number (2) is the tip design, and in both cases is an extended tip.</p><p></p><p>The SP-550 identifies as CYFS-12Y-PCT, but looking at the ford spark plug information available to the public it may be out dated.</p><p></p><p>PCT broken down individually is P- Standard Platinum electrode, C- Copper core electrode, T- ???</p><p></p><p>Ford claims the 550 is an iridium plug, so this may be another factor in the mix.</p><p></p><p>When we decided on Spark Plug selection, we first tried the NGK-6510's with poor results.</p><p></p><p>The SP-550's we tried next had no detonation and we have ran with them since with zero issues.</p></blockquote><p></p>
[QUOTE="New Nick at JDM, post: 1400202, member: 33540"] I am not 100% sure on build dates but I know certain 2018's have them. I've had a few customers we sent 550's to, only to note that the plugs installed are in fact 550's I think it was 534's that were in these trucks in the beginning, but again I am not 100% sure. Also SP-550's are no longer factory as well. I think currently the SP-580's are factory? It gets confusing as it seems some of the spark plug coding in the complete part numbers from Ford is not commercially available to the public. For example, the SP-542 identifies as CYFS-092-YPT and the SP-578 (the now debunked 542 replacement as it is not identical) is CYFS-12-YPT The first and sometimes second number (09) as with the SP-542 and (1) with the SP-578 is the heat range of the plug. 0 in front of the 9 with the SP-542 denotes "extremely cold." The 1 with the SP-578 designates "cold" The last number (2) is the tip design, and in both cases is an extended tip. The SP-550 identifies as CYFS-12Y-PCT, but looking at the ford spark plug information available to the public it may be out dated. PCT broken down individually is P- Standard Platinum electrode, C- Copper core electrode, T- ??? Ford claims the 550 is an iridium plug, so this may be another factor in the mix. When we decided on Spark Plug selection, we first tried the NGK-6510's with poor results. The SP-550's we tried next had no detonation and we have ran with them since with zero issues. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
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SP542 Thread
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