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Plug Gap

What do you gap at?

  • .050+

    Votes: 2 4.5%
  • .050

    Votes: 0 0.0%
  • .045

    Votes: 0 0.0%
  • .040

    Votes: 2 4.5%
  • .035

    Votes: 4 9.1%
  • .030

    Votes: 29 65.9%
  • .025

    Votes: 7 15.9%
  • .020

    Votes: 0 0.0%

  • Total voters
    44

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zac83

20+ Year Contributor
257
0
Dec 24, 2002
Yelm, Washington
What do you gap at? i run 17 PSI or so and gap 40 on a stock ignition system...
 
40!?!?!? Recommended is .27 for Turbos...
 
You should narrow your poll range to between .025-.035, including every .001 in that range. That would give you a better idea of where the prefered plug gap is, since most DSM'ers have settled around .028".
 
ehh? even the boys with upgraded ignition gap in that range? How about the fellas with high-rev motors? no wider gapping? I'm really amazed...
 
Didn't realize the recommended gap was .026-.028. The list was .035 according to auto parts store, no wonder they foul so quickly! I'm gonna change them again so I will close the new ones to .028
 
.028 and I change them all the time (3000)I lost 20 hp(dyno proven @ 15psi) because the gap was 35 deg on old plugs.It was causing knock after the air/ fuel was set
 
I'm hoping that everybody who posted 0.28 (or similar) without a zero between the decimal point and the number 2 (i.e. 0.028), simply forgot; otherwise, you boys better fix that 1/4" gap you have.

If you meant to put 0.28, please list the modifications done to your car to accept such a large plug gap.

Jake
 
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