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 ...
(https://scontent-sea1-1.xx.fbcdn.net/v/t1.0-9/s960x960/89293767_10157170082922685_6249234667594055680_o.jpg?_nc_cat=103&_nc_sid=110474&_nc_oc=AQnHQdXhh-uRwgOFTooTl8n4wQqwlVKt5F_rDLBw0nXwkuBW3DHLRl2T4etFM09tjWs&_nc_ht=scontent-sea1-1.xx&_nc_tp=7&oh=feccc32ee117313c1a67b1aa7e213eb8&oe=5EA3D726)
(https://scontent-sea1-1.xx.fbcdn.net/v/t1.0-9/s960x960/89552588_10157170083027685_2468058263216717824_o.jpg?_nc_cat=106&_nc_sid=110474&_nc_oc=AQnWAQX1qP2fLr6Gu7Ch4A32Mg4vJ450U9UslM0NsBC5x1DCFTz_fomDgsbyJL97qsE&_nc_ht=scontent-sea1-1.xx&_nc_tp=7&oh=e00bd7bc78a2d637b2dc3e3ea2ff4a97&oe=5E8ED7F3)
(https://scontent-sea1-1.xx.fbcdn.net/v/t1.0-9/s960x960/89174547_10157170083467685_9073514511863906304_o.jpg?_nc_cat=107&_nc_sid=110474&_nc_oc=AQmrg_0i7g89e2y6oGeaxmsiHYfL5lriD5rLQWdgvT5vaxQMcLT9jY-qnZ_j7ENUeaM&_nc_ht=scontent-sea1-1.xx&_nc_tp=7&oh=21b4a0b0f86e06ea756894b1313f28ef&oe=5E957B1E)
Maps to : https://www.fordpartscatalog.com/oem-parts/ford-spark-plug-cyfs092ypt3 (https://www.fordpartscatalog.com/oem-parts/ford-spark-plug-cyfs092ypt3)
mustang plugs .. guess thats a good sign?
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?
Quote from: TopherSho on March 11, 2020, 11:36:16 PM
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.
I bought a new pair of 542's last weekend, all were pre-gapped to .028 as well.
Either of you two fine gents note the part number on the ceramic ?
SP578 Ford CYFS12YPT
SP580 Ford CYFS12YT4
SP534 Ford CYFS12YT3
SP542 Ford CYFS092YPT
Quote from: SHOdded on March 12, 2020, 11:41:11 AM
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.
Here are the SP-542's.. Whats the part number on the actual spark plug! Z
Part Number: 95822- ILTR7N8
(https://i.imgur.com/pUwPSiQh.jpg)
Quote from: TopherSho on March 12, 2020, 10:01:27 AM
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.
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
Quote from: TopherSho on June 26, 2020, 05:26:57 PM
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.
Quote from: TopherSho on June 26, 2020, 05:26:57 PM
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 ..