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Which spark plugs do belive are best the for the 5.0 truck V8s

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Old 03-09-2009, 04:37 PM
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Question Which spark plugs do belive are best the for the 5.0 truck V8s

I have a 1992 with a 302ci, I have using Autolite double platinum plugs. They are great in the winter cold, but I loose some performance in the warmer weather. The AC Delco rapid fire plugs were sweet for warmer weather but the plug's heat range was too, high. So any suggustions would be great for which performance plugs to use.

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Old 03-09-2009, 04:44 PM
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motorcraft - SP502

only plugs i'll run
Old 03-09-2009, 07:25 PM
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would you recommend them on the 4.9 also ?????
Old 03-09-2009, 07:36 PM
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+1 for the motorcraft
Old 03-10-2009, 02:33 AM
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AC Delco??? Why would you use GM plugs in a Ford? Motorcraft is a Ford part.
Old 03-10-2009, 09:14 AM
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because sometimes you gotta put a chevy part in a ford so it will run...........
sorry guys being new to the world of fords and having grown up with chevy's i just couldnt resist.no offense intended.
Old 03-10-2009, 09:42 AM
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Originally Posted by Just call me Sean
AC Delco??? Why would you use GM plugs in a Ford? Motorcraft is a Ford part.

AC Delco is not just for GM if they were they wouldn't fit in a Ford and they did. As I said they were great for performance just the heat range was too, high. I also did better at the gas pumps.
Old 03-10-2009, 06:32 PM
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AcDelco is just a name brand, i was working as a mechanic 6 or 7 years ago and we stocked our own brake pads and rotors along with some other minor stuff, well the acdelco salesman came buy our shop and offered us a deal to use there parts, we switched and a couple weeks later they sent acdelco brake pad boxes to put all the pads we had in there boxes!! it was one of the funniest things i ever seen when it comes th that kinda stuff. Moral of the story, i'm sure they manufacturer a few things but i'm sure the just put there name on alot of parts that othe people make.
Old 03-10-2009, 11:55 PM
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Originally Posted by ecocav22
AC Delco is not just for GM if they were they wouldn't fit in a Ford and they did. As I said they were great for performance just the heat range was too, high. I also did better at the gas pumps.
AC Delco is recommended for GM vehicles, and Motorcraft is recommended for Ford vehicles. Just because it will fit doesn't mean you should use it.



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