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#1 Old 10-26-2008, 04:03 PM
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spark plug gap

so I went to the track today and the best I ran was a 14.49@99.38 with a 2.394 60'. All I have is a muffler delete, k&n, and iridium plugs gapped at .040. Is that too big of a gap? Could it be hurting me?
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#2 Old 10-26-2008, 04:48 PM
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Re: spark plug gap

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Originally Posted by squeak View Post
so I went to the track today and the best I ran was a 14.49@99.38 with a 2.394 60'. All I have is a muffler delete, k&n, and iridium plugs gapped at .040. Is that too big of a gap? Could it be hurting me?
i gapped mine at .040 at first but dude i realized that is a MONSTER gap for a turbocharged car.and it worstened my no gas take offs. i couldnt get completely moving by just letting out the clutch . theres no need to a gap that big i dropped mine down to .035 and it got better. 2cents

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#3 Old 10-26-2008, 05:11 PM
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Re: spark plug gap

what do you mean? could that be hurting me during launching?
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#4 Old 10-26-2008, 09:49 PM
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Re: spark plug gap

Quote:
Originally Posted by squeak View Post
what do you mean? could that be hurting me during launching?
what hurts you during launching is having a high power fwd vehicle on street tires. 1/4 mile tracks are setup for rwd or awd vehicles that use slicks. Last time out at the 1/4 mile track I couldn't break 14.6 secs. On the street I would run 14.0 secs because I get full traction on street pavement whereas I get lots of wheelspin at the 1/4 mile track.

I run a .035" gap, .040" won't hurt you much on stock boost levels but it could if you increased boost levels in the future. I found .035" felt a bit smoother so I stuck with it after trying out a few different gap settings. I wouldn't attribute your slow runs to the spark plugs though, it is mostly a traction issue when you run at a track.
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#5 Old 10-27-2008, 02:06 AM
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Re: spark plug gap

Quote:
Originally Posted by squeak View Post
so I went to the track today and the best I ran was a 14.49@99.38 with a 2.394 60'. All I have is a muffler delete, k&n, and iridium plugs gapped at .040. Is that too big of a gap? Could it be hurting me?

Practice and traction are most commonly the problem.



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#6 Old 10-27-2008, 02:45 AM
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Re: spark plug gap

mopar recommends that a .031 gap be used for stage 1.
It would be best to keep it close to that.

.040 is way too big in a boosted car.
You'll eventually get misfires if you havent already.

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#7 Old 10-27-2008, 08:24 AM
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Re: spark plug gap

i havent gotten any missfires but im scared i might be getting slight blowout. i know driving is key but i was also worried if the big gap would cause bogging during launching. next time i wil try lowering my tire pressure. i did have esp off.
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#8 Old 10-29-2008, 03:38 PM
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Re: spark plug gap

my car is gaped a 0.40 its ok no problems






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#9 Old 10-29-2008, 03:42 PM
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Re: spark plug gap

i went half way .035, seems about perfect.
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#10 Old 10-29-2008, 03:51 PM
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Re: spark plug gap

.040 in my NGK Iridium IXs. Way better over stock, much better idle and response.

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