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Old 05-15-2007 | 07:37 AM
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Mikey Likes It
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Default 500 EFI Spark Plugs
What is the best spark plug to use for the 500EFI? Also what should the gap be for the plug?

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Mike
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Old 05-15-2007 | 09:10 AM
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NGK BPR8ES is what is called for in the manual. The gap is stamped on top of the motor.
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Old 05-15-2007 | 01:05 PM
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also MR43t standard AC marine plugs. the NGK will be cheaper
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Old 05-15-2007 | 02:27 PM
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I Use The Extended Tip R43TS - Gap Should Be .035
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Old 05-15-2007 | 03:19 PM
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I run the AC42ts in my 500efi whipple motor. The 43 or the #6 should be good

Spark plug cross referance

http://www.dragstuff.com/techarticle...reference.html
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Old 05-15-2007 | 03:20 PM
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What do the extended tips get you? Are there any draw backs to using the extended tips?
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Old 05-15-2007 | 03:21 PM
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some good info on this site


http://www.dragstuff.com/techarticle...-pictures.html

http://www.dragstuff.com/phpBB2/viewtopic.php?t=22

http://www.dragstuff.com/techarticle...ead-plugs.html
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