got my sp542 replacements ... (pics) (oddity)

[TopherSho]

well they look the part ...  but there is an oddity.  It appears they are pre-gapped to .028/.029 ?    I cannot find my feeler gauge but my old wire guage .030 wont pass,  it is a hard no on all 6 plugs. 

part number is below and does not have any good details from the googlez
cyfs
092ypt3

hmmm doesnt seem right ...

 

[TopherSho]

Maps to : https://www.fordpartscatalog.com/oem-parts/ford-spark-plug-cyfs092ypt3

mustang plugs .. guess thats a good sign?

 

[TopherSho]

https://shoforum.com/index.php?threads/spark-plugs-sp578-new-part-number-for-542.139471/

this seems to indicate im good... of course this is the internet and all .. anyone else have any feedback?

 

[ridered74]

https://shoforum.com/index.php?threads/spark-plugs-sp578-new-part-number-for-542.139471/

this seems to indicate im good... of course this is the internet and all .. anyone else have any feedback?

I've been running mine at .026 for the last year. I think you would be fine running those.

 

[sm105k]

I bought a new pair of 542's last weekend, all were pre-gapped to .028 as well.

 

[TopherSho]

Either of you two fine gents note the part number on the ceramic ?

 

[SHOdded]

SP578 Ford CYFS12YPT
SP580 Ford CYFS12YT4
SP534 Ford CYFS12YT3
SP542 Ford CYFS092YPT

 

[TopherSho]

SP578 Ford CYFS12YPT
SP580 Ford CYFS12YT4
SP534 Ford CYFS12YT3
SP542 Ford CYFS092YPT

My ceramic has a 3 on the end of it ( CYFS092YPT3 ) .  Wonder if that means revision 3 of the ceramic tip,  mine is the new ''long tapered'' type.

 

[ZSHO]

Here are the SP-542's.. Whats the part number on the actual spark plug! Z

Part Number: 95822- ILTR7N8

 

[ridered74]

Either of you two fine gents note the part number on the ceramic ?

I did not. If we're being honest, my add generally doesn't allow me to retain anything past the first sentence of any post so I assumed your hangup was more gap based.

 

[TopherSho]

Update,  I do NOT like these plugs.  I have lost 4 tenths of a second of my 0-60 ... way way not happy.

Dropped from a repeatable 4.4 to a 4.8 ... super pissed since they cost a bunch

 

[ridered74]

Update,  I do NOT like these plugs.  I have lost 4 tenths of a second of my 0-60 ... way way not happy.

Dropped from a repeatable 4.4 to a 4.8 ... super pissed since they cost a bunch

I switched to the M-12405-35T plugs about a month ago. They seem to be OK.

 

[TopherSho]

Update,  I do NOT like these plugs.  I have lost 4 tenths of a second of my 0-60 ... way way not happy.

Dropped from a repeatable 4.4 to a 4.8 ... super pissed since they cost a bunch

I failed to update the thread,  my bad.  A reset seems to have solved it... but i'm baffled and still kinda annoyed that changing plugs had such an effect ..