Spark Plugs for 13:1 12psi SC
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Joined: Jun 2002
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From: Mom!!! The Meatloaf!!
Spark Plugs for 13:1 12psi SC
I used to be turbo back in the day (2003) and some point a lot of people were having issues with Denso IK iridium spark plugs (porcelain would break off).
Is that still an issue? What plugs are the go to plug? I see CT Engineering recommends those Desnos but Im not a huge fan of them.
Let me know what your'e running. Gap too
Is that still an issue? What plugs are the go to plug? I see CT Engineering recommends those Desnos but Im not a huge fan of them.
Let me know what your'e running. Gap too
Joined: May 2014
Posts: 152
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From: Santa Clarita
From everything I’ve read and reading a on Science Of Speed’s website, NGK BKR8 plugs seem like the way to go. They come pregapped to .24 (I don’t recall exact number but it’s around there) and are a heat range 8. From what I’ve found SOS offers the best price for them as well.
Joined: Aug 2006
Posts: 5,586
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From: New England
From everything I’ve read and reading a on Science Of Speed’s website, NGK BKR8 plugs seem like the way to go. They come pregapped to .24 (I don’t recall exact number but it’s around there) and are a heat range 8. From what I’ve found SOS offers the best price for them as well.
https://www.ngk.com/product.aspx?zpid=9358
- Gap: .031" (0.8mm)
Joined: Jan 2001
Posts: 9,929
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From: West of Chi., IL
My car is tuned and has been tuned for the last 6 years by Mikey Singhaseni who is the best tuner I've met over my 18+ years of S2000 ownership and he recommends, and I have used, the NGK BKR8EIX for these many years with 14psi of boost. I gap them to 25 thousandths from the 30+ out of the box. It's best to re-gap them after a season of use. I found that my gaps had increased to 27-29 thousandths over a year. In last week's check I had one in #1 that had increased to 31 thousandths. ???
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Those NGK 2668's here too. Good option.
Also, checking the plug gap maybe once a year, not every few weeks is just not needed, ever, unless you are running nitrous. Run as large a gap you can before you get spark blow out will give you the best performance. An increase gap from wear isn't bad unless you are now getting spark blow out ie ignition break up. Anything over about 10psi and you will need to gap them down from where they are out of the box. 0.25 is a good starting or ending point for higher boost set ups. E85 or water/meth injection and 20+psi you will find you need to gap them even tighter or you will get spark blow out.
Also, checking the plug gap maybe once a year, not every few weeks is just not needed, ever, unless you are running nitrous. Run as large a gap you can before you get spark blow out will give you the best performance. An increase gap from wear isn't bad unless you are now getting spark blow out ie ignition break up. Anything over about 10psi and you will need to gap them down from where they are out of the box. 0.25 is a good starting or ending point for higher boost set ups. E85 or water/meth injection and 20+psi you will find you need to gap them even tighter or you will get spark blow out.