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Old 03-19-2008, 06:57 AM   #1 (permalink)
 
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Which spark plugs and what to gap them at?

2003 Evo with a bunch of bolt-ons. 272 Cams are gonna be in next week. what would be the best plug to use and what should I Gap them at? I have been trying different plugs such as the iridium NGK's and bpr7es and 8's what would be best. im in florida close to sea level if that is helpful at all. Thanks guys
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Old 03-19-2008, 02:54 PM   #2 (permalink)
 
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Don't change plugs unless your current ones are fouled.

Once they foul, go with BPR7ES gapped to .026. If those sputter, then try BR8ES or BPR8ES gapped to .026.





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Old 03-19-2008, 04:46 PM   #3 (permalink)
 
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Anywhere between .23-.27 will work. If you crank the boost up shorten the gap or step up one plug colder such as the BPR8ES. I've run 28lbs on the BPR7ES gapped to .24 and never had any ignition problems.
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Old 03-19-2008, 06:44 PM   #4 (permalink)
 
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ok thanks. ive been messing with the iridiums and usedr to use the 7es's but had them gaped wrong ill try that out when i change em next. thanks guys
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Old 03-19-2008, 08:33 PM   #5 (permalink)
 
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If you don't want to change the plugs very often the iridiums are just fine. However the copper BPR's are extrememly cheap and will last you quite awhile.
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