Spark plug gap question.

[SCS55]

Spark plug gap question:
I searched the maintenance and tuning sections and couldn't find an answer:
I bought plugs from the dealership 2 months ago and checked the gap. They were all at .028 so I installed them. I have no issues on my stock engine. If they were gapped to .020 as many others set them to, would there be ANY noticeable difference in performance?

[Shadow2]

No. You only gap them tighter, when you're tuned. Tuning gives more boost which in turn can blow the spark out, tightening the gap makes it harder to blow out.

[clutchdj]

Originally Posted by SCS55

Spark plug gap question:
I searched the maintenance and tuning sections and couldn't find an answer:
I bought plugs from the dealership 2 months ago and checked the gap. They were all at .028 so I installed them. I have no issues on my stock engine. If they were gapped to .020 as many others set them to, would there be ANY noticeable difference in performance?

Idle speed will randomly misfire when the motor is cold. Most people will not notice unless they have a cable hooked up. Like shadow said do not gap tighter stock plugs unless your tuner recommends doing so; same goes for colder plugs.
the car could potentially make less power in some cases.

[chetman7]

Does anyone know what gap the service manual calls for?

I ask because I bought oem plugs and they were all pre gapped to 0.032

I had the dealership save my old plugs and there were all 0.028ish

A m4 local to me said his was more towards 0.022

I'm wondering if the dealership has protocol to change gap or leave and install at 0.032

[TTGator]

I was just researching this and made a DIY video of the entire install. At the beginning of the video I discuss various opinions on this that I found. Decided to go with 0.023.

[SCS55]

Originally Posted by TTGator

I was just researching this and made a DIY video of the entire install. At the beginning of the video I discuss various opinions on this that I found. Decided to go with 0.023.

0.023 based on?

[TTGator]

Originally Posted by SCS55

0.023 based on?

Like I said, I discuss it at the beginning of the video. Based on recommendations for Dinan Stage 3 tuning.

[SCS55]

Originally Posted by TTGator

Like I said, I discuss it at the beginning of the video. Based on recommendations for Dinan Stage 3 tuning.

Got it, Thx.
I sped past the beginning and missed it.

[AND1_M3]

will come in handy when i do mine. has anyone used the Brisk cold plugs?