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Brisk step colder plugs gap

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Old Mar 29, 2016 | 11:27 PM
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2009 C63 AMG
Brisk step colder plugs gap
What would be a recommended gap for the brisk step colder plugs from weistec. They aren't sure on what gap would be sufficient so they said start with .028. I know Oem is .039-.040. I am pushing 485whp currently so step colder was called for.
Last edited by Mag1c Carp3t; Mar 29, 2016 at 11:30 PM.
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Old Mar 30, 2016 | 12:13 AM
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What do your stock plugs look like? They are probably fine.
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Old Mar 30, 2016 | 12:22 AM
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Haven't pulled them but i figured since i have over 60k miles and over 120whp over stock its best to change them.
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Old Mar 30, 2016 | 01:05 AM
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Do stage 2 blower guys change plugs?

Not sure what gap would be, is there a general rule of thumb? I'd just gap them a bit less than stock.
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Old Mar 30, 2016 | 03:47 AM
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Yep I just used the stock gap they came with
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Old Mar 30, 2016 | 02:04 PM
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The information I got from the Weistec installation guide said to use OEM spark plug gap. The OEM gap according to Alldata is 0.8mm = .032".
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Old Mar 30, 2016 | 09:23 PM
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OEM spec is .039" I gapped mine at .040"
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Old Mar 31, 2016 | 01:16 AM
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Originally Posted by mr747
Yep I just used the stock gap they came with
Do you recall what that gap was?
Originally Posted by Mort
The information I got from the Weistec installation guide said to use OEM spark plug gap. The OEM gap according to Alldata is 0.8mm = .032".
Could have sworn it was .039"
Originally Posted by dubzAMG
OEM spec is .039" I gapped mine at .040"
Any issues with this gap?
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Old Apr 1, 2016 | 12:05 AM
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Originally Posted by Mag1c Carp3t
Do you recall what that gap was?

Could have sworn it was .039"

Any issues with this gap?
No issues.
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Old Apr 1, 2016 | 02:14 PM
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Originally Posted by dubzAMG
No issues.
How much whp you making over stock that called for a step colder plug?
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Old Apr 6, 2016 | 08:16 AM
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Let's put the gap debate to rest

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