Are these a Ford part? Just got 1k on the truck and changing the oil to full synthetic so thought I'd have them install the plugs while it's there. Is .030 the recommended gap? What difference will I notice in the truck. Please excuse my ignorance but haven't had anything with spark plugs in over 25 yrs.
Sp 542
- Thread starter bo1966
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Basically because I keep reading how good they are. But no idea what there gonna do for me. The dealership owes me a free service so thought I'd do that if it makes an improvement.
Higgs Boson
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they dont do anything, i have them.
RaptorFlipper
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They are colder plugs that actually do do something. My mechanic explained it, but i cant quite remember enough to explain correctly. I can tell you i upgraded the plugs in both my raptors and it makes a difference. Someone help me out here with the explanation please.
Can you explain the difference please
IRONMAN2
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Just like changing the oil so early. There is no point to it.
RaptorFlipper
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Ok. Here we go. It has to wit the heat range of our engines. This is the speed at which the spark plug can transfer heat from the firing tip to the cylinder head water jacket into the cooling system. Choosing the right heat range is critical to high performance engines. The sp 542 is a "colder" plug with a shorter insulator nose length(the distance from the tip to the spark plug shell), and transfers heat rapidly from its firing tip to the water jacket. Cold plugs are ideal for high rpm engines, FORCED INDUCTION applications, and other instances where engine temps operate at a high rate. The bottom line is that these plugs help our engines with heat transfer to help keep the engine from detonating or pre ignition. Colder plugs transfer heat faster. Hotter plugs(like the stock ones) can hold heat longer and transfer it at the wrong time and pre-ignite the air/fuel mixture. This can cause broken parts. Hope that helps.
Higgs Boson
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the 542s may be different from 2017 plugs but they were identical to my 2018 plugs, which were also not the plugs the threads stated were in the truck stock.
i think ford made a change from 17 to 18. i do agree with the benefits of a colder plug when needed, but in my experience with my truck, the 542s will not benefit.
i measure spark advance and retard, knock, etc etc and they provided no benefit. my truck has adapters, downpipes, tune, etc.
placebo, at least for an 18, I can't speak for a 17.
i think ford made a change from 17 to 18. i do agree with the benefits of a colder plug when needed, but in my experience with my truck, the 542s will not benefit.
i measure spark advance and retard, knock, etc etc and they provided no benefit. my truck has adapters, downpipes, tune, etc.
placebo, at least for an 18, I can't speak for a 17.
RaptorFlipper
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That is interesting Higgs. There are quite few guys on here who swear by them. My mechanic thought they were better as well. I am only saying what he said about them. Maybe Ford did make a switch this year. Let me go see what was in mine stock.
Onemoosehorn
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Sp 542’s made a big difference in my 18 as far as idling. Little better pull throughout boost also. I can tell a difference. But my 18 also had SP 527’s from factory, according to the part number, for some reason.
RaptorFlipper
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Yes,
I am trying to find out what mine had from Ford. I replaced immediately. Ill keep you posted.
I am trying to find out what mine had from Ford. I replaced immediately. Ill keep you posted.
TXRaptor
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My 2018 had the following plugs:
CYFS12PCT
I swapped them at 2000 miles. I was not having any of the problems others reported, but I wanted to avoid issues.
Where do you find the translation from the part on the plug to the type?
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Change your oil when you want. I'll do the same[COLOR="Red"[COLOR="Red"]
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Thank you for explaining it. It is appreciated. Also, thank you for not just making comments that don't address or answer the original questions
Onemoosehorn
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I just did a search online for the part number. A dealer I called had no idea the “SP” equivalent for the part number. I believe that’s the same plug I had. That number was the 527, from what I could find. I could be wrong though.
My 2017 came with CYFS-12Y-PCT. I replaced them with SP 550 which also have part# CYFS-12Y-PCT on them. I ran the part# for the hell of it and that # comes up as SP 550 and also says Superseded Part Number SP-527. So it appears that SP 550 and SP 527 are the same.
Onemoosehorn
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Thanks.
RaptorFlipper
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Ok. My 18 came with Motorcraft SP534 or CYFS-12Y-T3. I replaced with higher boost plug SP542 OR CYFS-092-YPT. Pre-gapped at 025-030. I simply went with what my guy suggested. All he does is work on race cars and trucks. The truck runs awesome! Hope this info helps.
