Spark plug replacements

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May 12, 2009, 02:53 PM

#16

Hiboost

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I'm thinking about replacing the plugs as a preventative for this season after reading that the rich factory tune can foul them up pretty good. I found this post in the 8/9 forums:

https://www.evolutionm.net/forums/ev...ead-plugs.html

I'll be running the GT3076R with 25-26 psi on street gas soon and besides gapping them slightly tighter it looks like I should run at least one heat range colder with an extra 150-200 crank HP on tap.

Quote:

Evo 10 spark plugs:

Stock heat range: Gap @ .020-.022

- BRISK Silver Racing MR12S is performance upgrade spark plug replacing

- NGK - ILKR8E6 - OEM part #1822A021

Evo 10 (1 step colder):

- BRISK Silver Racing MR10S is a performance upgrade spark plug.

Source: www.briskracing.com

Stock: ILKR8E6

I read that plug chart from NGK and there are several choices for some so this could be wrong:

Iridium Platinum
Compact Type (Shorty)
Hex Size 5/8" Projected tip (ISO)
Resistor Type
8 Heat Rating
19mm (3/4") Thread Reach
.6mm Wide Gap

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May 12, 2009, 02:59 PM

#17

Hiboost

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Hmmm after looking at that site I'm not sure these are matching up the same as OEM now. Anyone run these in our cars yet?

Quote:

BRISK Silver Racing MR12S Spark Plug
for Performance and Racing application.

Spark Plug Dimensions:
12mm thread, 1.04"(26.5mm) reach, 14mm hex, gasket seat, non-projected tip, resistor, Silver center el., cut-back ground electrode

BRISK Silver Racing MR12S Spark Plug fit these popular Racing and Performance applications:

2008 NISSAN GTR Twin Turbo
2009 NISSAN GT-R Twin Turbo
KTM Racing
KTM 450 EXC-R 2007-2009
KTM 530 EXC 2008 - 2009

Quote:

BRISK Silver Racing MR10S Spark Plug
for Performance and Racing application.
12mm thread, 1.04"(26.5mm) reach, 14mm hex, gasket seat, non-projected tip, resistor, Silver center el., cut-back ground electrode
BRISK Silver Racing MR10S Spark Plug fit these popular Performance and Racing applications:
This is a colder heat range spark plug for modified applications.
BMW 135 twin turbo
BMW 335 twin turbo
BMW 535 twin turbo

2008 NISSAN GTR Twin Turbo
2009 NISSAN GTR Twin Turbo
KTM Racing
KTM 450 EXC-R 2007, 2008, 2009
KTM 530 EXC 2008, 2009

Last edited by Hiboost; May 12, 2009 at 03:04 PM.

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