E85 Guys...what are you gapping plugs at?

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Dec 24, 2011 | 11:42 AM

Wicked69

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E85 Guys...what are you gapping plugs at?

I asked in the build thread I have but really need this info quickly. I am starting to assemble the build today and wanted to get the plugs in first while I have lots of room. I was informed to use NGK 9's but never asked what gap to set them at. I believe E85 needs a smaller gap but not a 100% sure. You can see the build in my signature, no intercooler, and street driven a lot. Any quick help would be greatly appreciated.

Thanks.

Dec 24, 2011 | 12:53 PM

HydroStream6

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9s are pretty cold. I run BR7EF @.022 with E85 and 20psi.

Dec 24, 2011 | 12:58 PM

Wicked69

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Quote:

Originally Posted by HydroStream6

9s are pretty cold. I run BR7EF @.022 with E85 and 20psi.

Thanks. With E85 you do run them tighter correct? Do you know what the reasoning behind it is? I think before I was running .028 but that was in my BBC. Not sure if it matters what engine it is or if Boost plays a role.

Thank you for the quick response.

Did you end up running an intercooler or no intercooler.

Dec 24, 2011 | 02:26 PM

HydroStream6

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I ran them at the same gap on gasoline as well. I used to get some blowout with gas @ .028". I went down to .022" and never had a problem with gas or E85. Some people run them tighter on E85, I'm not sure of the reasoning. It could just be because of the greater volume of alcohol that needs to be burned when compared to gasoline.