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post #1 of 8 Old 07-29-2021, 03:38 PM Thread Starter
Zigged79
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Spark Plugs

What ARE YOU GUYS RUNNING for an AMC 360 HEI, Spark plugs. What Gap?

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post #2 of 8 Old 07-30-2021, 06:00 AM
jeepdaddy2000
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You can usually open them up .005 to .0010 over stock if you want.

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post #3 of 8 Old 07-30-2021, 07:43 PM Thread Starter
Zigged79
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I think they do need to run a little hotter. What brand and number are you running?
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post #4 of 8 Old 07-31-2021, 08:55 AM
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Quote:
Originally Posted by Zigged79 View Post
I think they do need to run a little hotter. What brand and number are you running?
Why do you think this? Are you getting fouling? What plug are you currently running?

Hotter plugs are better for stop and go driving and short trips (fouling issues), cooler plugs are better for loads or high RPM work (heat dissipation).

I believe the stock plug is a Champion N12Y, or a variation of that.

Be sure your engine is in proper tune before swapping plug ranges.

I'm not currently running an AMC motor, but have experience with them as well as HEI upgrades and plugs, so that is where my advice is coming from.

Paperwork will ruin any military force.
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post #5 of 8 Old 07-31-2021, 05:17 PM Thread Starter
Zigged79
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I've been running Autolight 65. They don't seem to last very long. They act fouled. when I put a new set in it runs fine, but not as long as i would think it should. Only 3,000 miles.
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post #6 of 8 Old 08-01-2021, 01:05 AM
jeepdaddy2000
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Quote:
Originally Posted by Zigged79 View Post
I've been running Autolight 65. They don't seem to last very long. They act fouled. when I put a new set in it runs fine, but not as long as i would think it should. Only 3,000 miles.
The act fouled or they look fouled?


Are they all fouled or a specific cylinder?

Are they black?
Brown?
White?
Sooty?
oily?


Fouling can be anything from over rich jetting to a malfunctioning PCV system. The trick is to insure there isn't an underlying issue.

Paperwork will ruin any military force.
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post #7 of 8 Old 08-01-2021, 11:27 AM Thread Starter
Zigged79
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The plugs have only a slight tan color. I will be going over everything soon to make sure everything else is in order.
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post #8 of 8 Old 08-01-2021, 11:41 PM
jeepdaddy2000
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IMHO, slightly tan is perfect.
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