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Old 10-10-2014, 03:42 PM   #1
3tegStrong
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Default Spark plugs/Boost question(s)
Hi People. I'm doing a little research about spark plug heat range and boost on the FD. Car is stock except for the PFS EMS and it hasn't been tuned since the ems was installed several years ago. Last month, did a quick tuneup/oil & filters change and got new tires, and took it down to US43 for their last test n tune night.
She's not as peppy as she was last time we went, so one thing we decided to do was get new plugs-
Bought the NGK 6917- standard copper replacement plugs to start out, and just chatting with the guy at autozone, the question of heat range, plugs and boost came up. I had no luck researching that question on here, so my questions- I'm sure I sound totally ignorant to most of you-and I am, please bare with me! :

What spark plug/heat range should I get for running more boost (like over 12psi instead of 9psi?)

I keep seeing 'leading' and 'trailing' plugs/coils mentioned= are the spark plugs for either different, or need to be different, or all four the same?

&.. Do any of you know or suggest a good place to have the FD tuned again, I'm near nashville-so closer is better, but not really that important.

Thanks!






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