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Old 11-11-2012, 03:43 PM   #11 (permalink)
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I've got to agree with the slightly larger gap idea, worked great on my rich running carbureted Mustang went from 32 to 45 thousands gap, and on my little FI 2.3 Ranger also, spark intensity builds until it jumps the gap, duration of spark can be improved with one of the Crane or other MSD ignitions on a distributor type car, from my experience multiple strike work amazingly well, dont know how a newer single coil per plug setup would benefit but sparks are getting stronger all the time as in newer car s where they have a coil right at the plug itself, Ford made a 2.3 and 2.5 Ranger engine that had two plugs per cylinder, and much more power than the older types, i owned both and big difference, so I would gap them wider and try them, you only lose if they wear to be too much gap. the real proof is all the new cars have a wider gap than the e60's cars before electronic spark.

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Old 01-23-2013, 05:54 PM   #12 (permalink)
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E3 performance spark plugs.
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Old 01-24-2013, 08:45 AM   #13 (permalink)
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Quote:
Originally Posted by suspectnumber961 View Post
I've had good luck with some Autolite double plats...will be trying E3s eventually.
Installed a set of Autolite copper plugs slightly over-gapped....need to be changed out 1x per yr? Went with these due to recommendations from a Focus forum.
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Old 01-24-2013, 09:01 AM   #14 (permalink)
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+1 to the OEM spark plug.

I have tried many different plugs in my Jeep XJ including bosch +4, E3 and even a set of iridium plugs. The best all around performance and fuel economy was always with the OEM plug. FWIW I have tried indexing the spark plugs but have had no noticeable gains in power or economy. Although it was only in the real world not a dyno.

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Old 01-24-2013, 02:12 PM   #15 (permalink)
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Must concur autolite copper plugs worked best for me, course if they were hard to change i would go with the double platinum,
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Old 02-16-2013, 01:42 PM   #16 (permalink)
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Best Spark Plug (For Me)

I've used several brands (Bosch, Autolite, Champion) with several different metalurgies (Platinum, Iridium, Copper) and electrode designs (V-Notch, Shrouded, Multi) and have always found the Bosch Platinum+ Single Ground Electrode has ALWAYS worked the best for my applications (1977 Datsun B210 1.6L, 1989 Jeep Cherokee Pioneer 4.0L, 1991 Jeep Cherokee Laredo 4.0L). But then all three were OHV heads with the in-block camshafts, even though the Datsun engine had a aluminum head, so results may vary for other people's applications.
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Old 02-28-2013, 06:41 PM   #17 (permalink)
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I prefer NGK spark plugs. Work really great.
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Old 02-28-2013, 08:42 PM   #18 (permalink)
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I had a 98 s-10 (2.2L)for my first truck, I put Bosch +4 in expecting great gains and couldn't even do a burnout on grass (i was 16) and my cat was glowing red hot! I was told to put the OE Ac delco plugs in it, I did and went on a trip to Kentucky and back got 27 mpg with an automatic trans and the truck ran great! My vote is the OE Plug maybe a little wider gap
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Old 02-28-2013, 10:51 PM   #19 (permalink)
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Old 07-09-2017, 03:56 PM   #20 (permalink)
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I would maybe try indexing them. Or maybe "side gaping" and indexing them both. Both are older Hotrodding tricks.

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