Best spark plugs for a Gen IV ACR that sees 90% of it's life on the track.
Mods are: Gen V intake, 10% lower UD pulley, Arrow PCM, and custom headers.
Changing out the wires next week and figured I'd look in to changing plugs as well. if needed.
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Thread: Spark Plugs
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07-02-2019 #1Enthusiast
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Spark Plugs
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07-02-2019 #2VOA Member
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OEM, probably better plug wires out there though. Running headers with the Arrow PCM? I got the same mods. Ever dyno it?
09 ACR With all the goodies
99 ACR TT 99 red RT/10 Roe S/C
97 B/W RT/10 TT 94 RT/10 TT
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07-02-2019 #3VOA Member
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.......
09 ACR With all the goodies
99 ACR TT 99 red RT/10 Roe S/C
97 B/W RT/10 TT 94 RT/10 TT
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07-02-2019 #4Enthusiast
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It put down 647/613 on a Mustang dyno.
Originally Posted by 99RT10
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07-02-2019 #5VOA Member
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Ported heads? Great numbers!
09 ACR With all the goodies
99 ACR TT 99 red RT/10 Roe S/C
97 B/W RT/10 TT 94 RT/10 TT
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07-02-2019 #6Enthusiast
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Yes. Originally Posted by 99RT10
Honestly dynos don't really impress me all that much. You could have a 25-50hp gap on the same day depending on the dyno and it's calibration.
I always take it to the track to see if it feels stronger because that's what matters to me.
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