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www.ColoradoClassicBroncos.com - View topic - EFI Spark Plug Gap
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 EFI Spark Plug Gap 
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Joined: Mon Feb 14, 2011 10:29 am
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Location: The MHC
Post EFI Spark Plug Gap
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!

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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.


Tue May 26, 2015 12:36 pm
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Joined: Thu Jan 22, 2015 1:46 am
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Location: Greeley, CO
Post Re: EFI Spark Plug Gap
Modern ignition = modern sparkplug gap.

Those coil packs are putting out the same energy in your Bronco as they were in the Explorer.

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Tue May 26, 2015 12:54 pm
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Post Re: EFI Spark Plug Gap
You want to run as much as possible before you get spark blow out.

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Rob

74 Ranger EFI351w, 4r70w, ARB 5.13 9in, ARB 5.13D44, and a bunch of other goodies. Best of all the family memories.

04 Mustang Cobra, KenneBell 2.2 feeding a lot of boost on E85. Tire shredding machine

New project: 77 Bronco Ranger, body work and more body work.

Very little left of a 72 durango tan explorer sport


Tue May 26, 2015 8:00 pm
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Joined: Mon Feb 14, 2011 10:29 am
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Location: The MHC
Post Re: EFI Spark Plug Gap
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.

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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.


Wed May 27, 2015 7:07 am
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