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Mustang Forums
2011-2014 Mustangs
Engine/Tuning
Recommendations for spark plugs and coils for max effort NA car?
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<blockquote data-quote="Don's Bolt" data-source="post: 15295256" data-attributes="member: 522"><p>I am not a expert on E85m but can share some of my experience with some different plugs I have run</p><p></p><p>I have had the best luck with NGK LTR71X-11 part number 6510 ONE step colder. and projected tip</p><p></p><p>2nd Best luck Brisk RR14YS ONE step colder, projected tip</p><p></p><p>3rd best luck Brisk RR12YS TWO step colder, projected tip</p><p></p><p>worst luck Brisk RR12S Two step colder, NON Projected tip</p><p></p><p>Factory Plugs are a projected tip, so unless your only racing the car, with no street driving I recommend staying away from a NON projected tip plug. For a race only car that you will be changing plugs before each event they might be OK, but not for a daily driven car. They tend to foul quicker than a Projected tip plug</p><p></p><p>I won't say who installed a set of Brisk RR12S into my car, but they fouled so much that after a month the car wouldn't even start. They built and tuned the motor, so I took there word that was the plug, and heat range for my new motor. I then switched to the Projected tip RR12YS which didn't foul nearly as much, but were still a little to cold for my daily driven car. I have since switched tuners, who dyno'd, and street tuned my car, I am back to the NGK 6510's and the NGK plugs burn so much better.</p><p></p><p>I don't know what heat range you should use for E85 but these would be my recommendations</p><p>1 step colder NGK 6510 or if you want a silver electrode Brisk RR14YS</p><p>2 step colder Brisk RR12YS</p><p></p><p>All projected tips</p><p></p><p>I do have a set of RR12YS, I may use just when at the drag strip when I need a little colder plugs</p><p></p><p>Pics on some plugs, Non projected RR12S, and NGK 6510 I know different heat range, non projected, VS projected tip, and different tune, but will give you a idea about different tip designs</p></blockquote><p></p>
[QUOTE="Don's Bolt, post: 15295256, member: 522"] I am not a expert on E85m but can share some of my experience with some different plugs I have run I have had the best luck with NGK LTR71X-11 part number 6510 ONE step colder. and projected tip 2nd Best luck Brisk RR14YS ONE step colder, projected tip 3rd best luck Brisk RR12YS TWO step colder, projected tip worst luck Brisk RR12S Two step colder, NON Projected tip Factory Plugs are a projected tip, so unless your only racing the car, with no street driving I recommend staying away from a NON projected tip plug. For a race only car that you will be changing plugs before each event they might be OK, but not for a daily driven car. They tend to foul quicker than a Projected tip plug I won't say who installed a set of Brisk RR12S into my car, but they fouled so much that after a month the car wouldn't even start. They built and tuned the motor, so I took there word that was the plug, and heat range for my new motor. I then switched to the Projected tip RR12YS which didn't foul nearly as much, but were still a little to cold for my daily driven car. I have since switched tuners, who dyno'd, and street tuned my car, I am back to the NGK 6510's and the NGK plugs burn so much better. I don't know what heat range you should use for E85 but these would be my recommendations 1 step colder NGK 6510 or if you want a silver electrode Brisk RR14YS 2 step colder Brisk RR12YS All projected tips I do have a set of RR12YS, I may use just when at the drag strip when I need a little colder plugs Pics on some plugs, Non projected RR12S, and NGK 6510 I know different heat range, non projected, VS projected tip, and different tune, but will give you a idea about different tip designs [/QUOTE]
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Recommendations for spark plugs and coils for max effort NA car?
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