[jdub1981]

Yup

Welp all the ones i pulled look fine i think..

Tappin on a phablet 4

 

[XRJoe]

Just being a stickler, but gap should be .028". I know many folks write it as .28, but I'd hate to see someone try to open them up to 1/4" gap and ruin the plug.

 

[San-Juan]

Welp all the ones i pulled look fine i think..

Tappin on a phablet 4

Need to see the inside of the plug. How light is the insulator? Is there a ring at the insulator base?

 

[Twheeler.stl]

Disclaimer - I bought the car with 6,500 miles so I'm assuming the PO was stock tune.

I put 4,000 miles on and pulled the plugs for a total of 10,500 miles. They looked like this. To me this this looked a little lean (Too hot? Pre ignition?).

I used 87 octane on stock tune. Random gas. Not a care in the world. Ignorance was bliss.

 

[Twheeler.stl]

At 10,500 miles I got a Panda custom tune for the 91 octane available in my area. I've put 9,000 miles on since the tune and pulled the plugs tonight. They look like this. Pretty good color. Still the stock plugs as shown in the previous post (LTR6DI-8).

With this tune I have been religious about using top tier 91 octane with some 93 octane mixed in when I could get it.

Looks like quality gas makes a difference in keeping the plugs from being too hot. I pulled this to see if I should be going one step colder. Now I'm not so sure I need to.

 

[joshst85]

So what spark plug do I get for a stock car? I read the thread but people are even mentioning different part numbers for a stock plug. I'm confused.

 

[Twheeler.stl]

So what spark plug do I get for a stock car? I read the thread but people are even mentioning different part numbers for a stock plug. I'm confused.

LTR6DI-8

^^thats the stamp on the side of my stock plug. Stock plug with a stock tune and good gas will be fine.

 

[joshst85]

LTR6DI-8

^^thats the stamp on the side of my stock plug. Stock plug with a stock tune and good gas will be fine.

Some people are saying this, some are saying CFYS12Y2. I can't find the ones above in a google search. Can I buy these in store anywhere?

 

[Twheeler.stl]

Some people are saying this, some are saying CFYS12Y2. I can't find the ones above in a google search. Can I buy these in store anywhere?

Pretty sure that number is just a different stamp on the stock plugs. Mine had that number as well.

Ford parts will definitely have them or check at the local auto parts store for the stock ST plug.

 

[EdgeAutosport.com]

"LTR6DI-8" is the NGK part number and I believe "CFYS12Y2" is the ford part number. The OEM plugs are NGK's

 

[Entertainment72]

Was knocking on e30, was wondering what was wrong and found it was my NGK plugs not gapped correctly .034. Regapped them to .026-27 and the car seems so much better.

NGK measured at .034 logs

------------
Same tank of gas plugs gapped at .026-27 logs

 

[Tarrant64]

Was knocking on e30, was wondering what was wrong and found it was my NGK plugs not gapped correctly .034. Regapped them to .026-27 and the car seems so much better.

Interesting to see better numbers for what I assume is cyl1-2, and now just 'OK' numbers for 3-4 where they were stronger before...

 

[amayhem]

Interesting to see better numbers for what I assume is cyl1-2, and now just 'OK' numbers for 3-4 where they were stronger before...

Do you happen to know the order the spark plugs are in comparison to the cyc left to right? I am going to regap them tomorrow after work

 

[Tarrant64]

Do you happen to know the order the spark plugs are in comparison to the cyc left to right? I am going to regap them tomorrow after work

I don't know for sure - i would assume left to right cyl 1-4, spark plug 1-4. I don't know why it would be different. I recall reading(maybe watching video?) you should put the spark plugs back in the same place you found them though.

 

[Zomb13]

Has anyone been able to identify if any HKS Racing or NGK Racing plugs will fit the FOST?


Sent from my ST with love.

 

[NCJB]

Has anyone been able to identify if any HKS Racing or NGK Racing plugs will fit the FOST?


Sent from my ST with love.

NGK definitely does. I run the LTR7IX-11

 

[Zomb13]

NGK definitely does. I run the LTR7IX-11

Those are not NGK Racing Plugs.

Big difference. I run the normal NGK right now as well.


Sent from my ST with love.

 

[NCJB]

Those are not NGK Racing Plugs.

Big difference. I run the normal NGK right now as well.


Sent from my ST with love.

Ohhhhh my bad. At work, just kinda skimmed it

 

[zoso]

I'm wondering if anyone else has broken the plastic tabs that hold the wire connector to the coil? I'm usually not that big of an idiot but it took three broken clips before I realized they need pressed in not lifted up. Anyone know if these clips are easily replaced? Do you think I'll have problems with them working their way back off without the plastic clip to retain them? I currently just wrapped them with electrical tape to secure them, no problems thus far.

 

[rainier446]

Has anyone been able to identify if any HKS Racing or NGK Racing plugs will fit the FOST?


Sent from my ST with love.

NGK Racing doesn't, not familiar with HKS Racing...