Spark Plug questions
- Thread starter FracaSHO
- Start date
D
DJE624
Guest
Here are the SP528 plugs we took out. They had 7200 on them. 6400 with the tune. Close to 30 1/4 mile runs. They were in fine shape but, I put the new SP534's in gapped at 30 anyway.
BTW, SP528 are Platinum and SP534 are Iridium. Thanks for the info Chris!
(Not sure about the temps. Anybody?)
BTW, SP528 are Platinum and SP534 are Iridium. Thanks for the info Chris!
(Not sure about the temps. Anybody?)
Per the Motorcraft catalog http://mfr.activant.com/motorcraft/mcsrv?command=setLookupType&action=ford :
SP528 Suppressor Spark Plug
SUPERSEDED - .035 GAP - TYPE: STANDARD SERVICE PLG - PLG MATERIAL: IRIDIUM - SHO
SP534 Suppressor Spark Plug
.035 GAP - TYPE: STANDARD SERVICE PLG - PLG MATERIAL: IRIDIUM - SHO
Both are listed as Iridium. Strange!
Originally, SP512A was the plug of choice, and that was platinum. Switchover for SHO occurred in 2011 MY and for the Flex after 9/6/10 build date, per Ford parts site.
SP528 Suppressor Spark Plug
SUPERSEDED - .035 GAP - TYPE: STANDARD SERVICE PLG - PLG MATERIAL: IRIDIUM - SHO
SP534 Suppressor Spark Plug
.035 GAP - TYPE: STANDARD SERVICE PLG - PLG MATERIAL: IRIDIUM - SHO
Both are listed as Iridium. Strange!
Originally, SP512A was the plug of choice, and that was platinum. Switchover for SHO occurred in 2011 MY and for the Flex after 9/6/10 build date, per Ford parts site.
D
DJE624
Guest
That is strange. This is what I found on a quick Google search using the CY number off the old plugs. My new SP534 were already gapped at 30 too.
Can't open the link Shodded.
Can't open the link Shodded.
D
DJE624
Guest
I see they have spec'd 528 for non-turbos and 534 for the SHO. That must be fairly new since my built in 01/12 SHO had the 528. I'm still wondering if the 534 are a step cooler and why they came already gapped at 30.
crash712us
New member
Motorcraft CYFS12Y3 Finewire Platinum Tip Spark Plug
The Finewire Platinum spark plug was designed to improve electrode wear beyond the capability of the Single Platinum spark plug. The quantity of platinum is 2 to 3 times greater than the Single Platinum plug and its thin cylindrical shape serve to reduce the required firing voltage. This results in diminished erosion of the platinum and robustness against fouling.
Finewire Platinum Tip Spark Plug
Same part installed when the engine rolled off the assembly line
100,000-mile service interval
.6 mm finewire design improves ignitability
Designed for overall durability with virtually no gap erosion
Motorcraft Spark Plugs are matched to meet the highest level of engine systems performance.
The Finewire Platinum spark plug was designed to improve electrode wear beyond the capability of the Single Platinum spark plug. The quantity of platinum is 2 to 3 times greater than the Single Platinum plug and its thin cylindrical shape serve to reduce the required firing voltage. This results in diminished erosion of the platinum and robustness against fouling.
Finewire Platinum Tip Spark Plug
Same part installed when the engine rolled off the assembly line
100,000-mile service interval
.6 mm finewire design improves ignitability
Designed for overall durability with virtually no gap erosion
Motorcraft Spark Plugs are matched to meet the highest level of engine systems performance.
D
DJE624
Guest
Thanks for that Chris. I know we discussed that the 528 was platinum and the 534 was iridium. Would you happen to know if the 534 is in fact one step cooler than the 528 and/or why they spec it out for the SHO?
I've got almost 50K on mine and I've been following this thread with interest. Since I've been displaying my boost I've had the feeling that my boost was 1 or 2 lbs short of what I expected. Also had the feeling that the performance at times was appropriately strong and at other times a bit anemic. I chalked it up to my familiarity. Now the plugs have me exited. I ordered a set of the 534s from O'riely and I should get them next week. I know I'm dating myself but the last time I changed a set of plugs the coil sat on top of the intake manifold and was plugged into a distributor. I'm going to heat up the garage and do this myself but I hope the coil and bolt that needs to be removed from each plug is pretty obvious cause it's going to be new ground for me! Fingers crossed!
crash712us
New member
DJE624 said:
I am going to say from what I am seeing out there they are the same heat range. I am haven trouble finding a updated motorcraft plug heat range chart.
D
DJE624
Guest
From what I just found, the first number is the heat range. So, the 528 and 534 are the same heat range. But, they have a different tip configuration.
D
DJE624
Guest
DJE624 said:
Posted on other thread but thought I'd put it here too. Stock 2012 plugs were SP528. They were all gapped at 34-35. They looked really good with only 7200 miles on them. New plugs, SP534 all came pre-gapped at 30. My guy charged me $160 but with coupon, it was $140.
Thanks for the thread Brad!
Recommend a consolidated "Spark Plugs" Thread….
There is a lot of good information and discussion in this thread. The same is true for the other spark plug thread. I wonder if someone could consolidate somehow so that we don't have double posts and/or double reads to get the same info. Both of these threads have had wide readership.
The other thread , which is in Ecoboost performance / Tuning / Spark plug questions is here:http://www.ecoboostperformanceforum.com/index.php?topic=1914.0;topicseen
…Just a thought
There is a lot of good information and discussion in this thread. The same is true for the other spark plug thread. I wonder if someone could consolidate somehow so that we don't have double posts and/or double reads to get the same info. Both of these threads have had wide readership.
The other thread , which is in Ecoboost performance / Tuning / Spark plug questions is here:http://www.ecoboostperformanceforum.com/index.php?topic=1914.0;topicseen
…Just a thought
Recommend a consolidated "Spark Plugs" Thread….
There is a lot of good information and discussion in this thread. The same is true for the other spark plug thread. I wonder if someone could consolidate somehow so that we don't have double posts and/or double reads to get the same info. Both of these threads have had wide readership.
The other thread , which is in Vehicle Specific » SHO and MKS » Intake/Exhaust » Spark plugs with 60k miles on them. is here:
http://www.ecoboostperformanceforum.com/index.php?topic=1929.0
… Just a thought to consolidate knowledge for easier access
There is a lot of good information and discussion in this thread. The same is true for the other spark plug thread. I wonder if someone could consolidate somehow so that we don't have double posts and/or double reads to get the same info. Both of these threads have had wide readership.
The other thread , which is in Vehicle Specific » SHO and MKS » Intake/Exhaust » Spark plugs with 60k miles on them. is here:
http://www.ecoboostperformanceforum.com/index.php?topic=1929.0
… Just a thought to consolidate knowledge for easier access
D
DJE624
Guest
Done.
IHeartGroceries
New member
The set of 534s showed up today.
I've already pulled then out, and checked gapping. I ordered them from Rock Auto, where I do most of my online car/truck part business. Arrived here in 3 days, for $27 shipped. Can't beat that.
Shameless plug aside (harhar), they arrived gapped at approximately .035. I adjusted them to .030 with a feeler gauge.
Ready to go in. Was intending to tackle it tonight, since this weekend I'm pulling the LCAs on the Neon. But, may not have the time this evening.
I'm still willing to document the procedure, if the community would like a simple how-to.
Sent from my SM-N900V using Tapatalk
I've already pulled then out, and checked gapping. I ordered them from Rock Auto, where I do most of my online car/truck part business. Arrived here in 3 days, for $27 shipped. Can't beat that.
Shameless plug aside (harhar), they arrived gapped at approximately .035. I adjusted them to .030 with a feeler gauge.
Ready to go in. Was intending to tackle it tonight, since this weekend I'm pulling the LCAs on the Neon. But, may not have the time this evening.
I'm still willing to document the procedure, if the community would like a simple how-to.
Sent from my SM-N900V using Tapatalk
D
DJE624
Guest
That's really strange that your plugs came gapped at 35 and mine came gapped at 30. I got mine from an auto parts store on Amazon for $32 shipped. Maybe there was a $5 gapping fee. :clown:
lease: