Can we talk about Spark Plugs?

[Intuit]

I want to see a spark plug that shoots lasers.

Similar and recent topic of discussion...
https://www.fiestastforum.com/threads/ruthenium-plugs-who-here-has-use-them.21347/post-366428

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[Spork1569]

Ask your tuner then. Don't assume new plugs or step colders are automatically better. He should be aware of any hardware changes so he can help identify any issues.

Sent from my SM-G930T using Tapatalk

Dizzy does recommend step colder for any of his tunes to help prevent knock.

This is from his email I got when I purchased my 91 Stage 2 tune:
"It is highly recommended to run only 91 octane. During testing, we found that a set of 1 step colder spark plugs, greatly reduced cylinder temps and drastically helped in keeping knock (kr) to a minimum. For this reason, to achieve the most performance, it is highly recommended to run a set of 1 step colder spark plugs with your Fiesta Flash Tune. Both NGK and Denso options can be purchased on my website."

 

[jmrtsus]

FYI, spark plug gaps. Did you know that the difference between .028 and .029 is one quarter the thickness of a human hair, hair is about .004 inches. The gap starts to open with each spark which is why we have to replace them.

 

[Hypergram]

FYI, spark plug gaps. Did you know that the difference between .028 and .029 is one quarter the thickness of a human hair, hair is about .004 inches. The gap starts to open with each spark which is why we have to replace them.

It's hard to imagine that little distance makes that much of a difference. I'm sure it does though... How interesting.

 

[Intuit]

Although at 12.4:1 compression, it's barely in tolerable range for normal premium anyway, I suspect that neglecting the plug gap, at least contributed to the condition of carbon build up in the cylinder; the results thereof are preignition. (inconsistent sometimes wonky idle, weak and an occasional studder on acceleration) This buildup is despite top-tier only fuel. (Shell Premium) The backs of the valves are 100% clean (not even any discoloration) despite overlap introduced by the OEM race cam (7 inches flutering needle at idle). It's not direct injection. For the time being, I've had to run octane booster to prevent the problem.

 

[MRX330]

The Motorcraft and NGK Ruthenium plugs are made for the 1,6 EB.

Stock plugs are garbage lol. End thread

Not for stock cars. Lots of thought went into those plugs. Ford is dumb at times but they’re not stupid

 

[MRX330]

Although at 12.4:1 compression, it's barely in tolerable range for normal premium anyway, I suspect that neglecting the plug gap, at least contributed to the condition of carbon build up in the cylinder; the results thereof are preignition. (inconsistent sometimes wonky idle, weak and an occasional studder on acceleration) This buildup is despite top-tier only fuel. (Shell Premium) The backs of the valves are 100% clean (not even any discoloration) despite overlap introduced by the OEM race cam (7 inches flutering needle at idle). It's not direct injection. For the time being, I've had to run octane booster to prevent the problem.

Usually one step colder plugs cause incomplete combustion if they’re installed when they’re not needed which leads to soot forming. Hotter modded engine use colder plugs. Too hot a plug in a hot engine the plug stays lit and will preignite the fuel before it’s compressed. Stock use stock plugs.

 

[Intuit]

Good contribution MRX. It's all OEM and stock uses the coldest plug available at the time. (CR10EK) What I didn't realize is, they were copper instead of iridium or platinum. Re-gap interval was just 8k and I was over 20k. Gap was in excess of 3x the OEM maximum.