EFI Spark Plug Gap

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EFI Spark Plug Gap

Postby TOOLMAN » Tue May 26, 2015 11:36 am

I finished up my EFI conversion and while EFIGuy was tuning my motor, he mentioned I should probably replace the plugs. So, here's the question: Do I gap the new plugs based on the original 302 (.028-.032) because I'm running a mid-70s long block, or to an Explorer 5.0 (.054). My guess would be .054 because I'm running the coil packs. Is this a correct assumption? Just thought I would run it by some more knowledgeable people before I install them. There's quite a big discrepancy there!
Wilma - 71 1/2 Wagon; 3 1/2" WH lift, 1" BL, NP435, Chebby disc front, WH twin stick D20, EFI 302, Cool hood scoop, mucho cancer; purchased in 1990.
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Re: EFI Spark Plug Gap

Postby sykanr0ng » Tue May 26, 2015 11:54 am

Modern ignition = modern sparkplug gap.

Those coil packs are putting out the same energy in your Bronco as they were in the Explorer.
"You say overkill like it's a bad thing."
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Re: EFI Spark Plug Gap

Postby ZOSO » Tue May 26, 2015 7:00 pm

You want to run as much as possible before you get spark blow out.
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Very little left of a 72 durango tan explorer sport
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Re: EFI Spark Plug Gap

Postby TOOLMAN » Wed May 27, 2015 6:07 am

So, for the record, I did .054 and it seems to work just fine. I had a tiny miss and this seemed to cure it. The old plugs were about a year old and looked pretty good, but were gapped at probably .032-.035. Note: I'm using stock Motorcraft coil packs.
Wilma - 71 1/2 Wagon; 3 1/2" WH lift, 1" BL, NP435, Chebby disc front, WH twin stick D20, EFI 302, Cool hood scoop, mucho cancer; purchased in 1990.
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