2.4L LE5 Performance Tech 16 valve 171 hp EcoTec with 163 lb-ft of torque

Bosch +4's vs. Race Performance Plugs

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Old Feb 24, 2008 | 04:26 AM
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Bosch +4's vs. Race Performance Plugs

Your thoughts?
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Old Feb 24, 2008 | 04:29 AM
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dont get bosch especially if u have an 05-06 as it will kill the coil plugs down the road.. oem is good also NGK has awesome ones to
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Old Feb 24, 2008 | 04:42 AM
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how does a plug kill a coil pack?
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Old Feb 24, 2008 | 04:43 AM
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I was thinking the same question
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Old Feb 24, 2008 | 04:48 AM
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ask hackabuse, is a known problem with plus fours from bosch in pre 07s.. its happened to a few people on here.. something about spark i believe let me forward link to jeff..
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Old Feb 24, 2008 | 05:08 AM
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the general issue is that it's too much spark plug for the coil packs. Because it utilizes more of a powerful spark than the coil can take it fries the cables or the coil pack itself. Keep the stocker plugs in, trust me at this point in the ball game unless your just changing the gapping of the plugs, a different plug all together won't net anything for you.
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Old Feb 24, 2008 | 05:08 AM
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THat is ******* LAME
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Old Feb 24, 2008 | 05:19 AM
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just got some NGK's today to replace the ZEX ones that I have (I've cleaned these twice, and my car RPM-drop is still pretty bad...it wasn't when I first installed them last summer--now this car keeps wanting to die at every stoplight), and I was just double-checking the gap. .040, right? I would have just gotten OEM ones, but I forgot what brand came with the car...I want to say AC Delco.

anyone know if the NGK come pregapped?

sidenote: i did get the Bosch windshield wipers that contour to your windshield...those things are working out well.
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Old Feb 24, 2008 | 05:26 AM
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Originally Posted by xravenwingsx
anyone know if the NGK come pregapped?
no, gap em yourself. Always gap plugs regardless if they come pre-gapped. #1 pet pev of mine. Never let someone do the work for you. You just never know...

Originally Posted by xravenwingsx
.040, right?
What modifcations do you have? Gap is dependent on what your running.

Last edited by 3fo893013L; Feb 24, 2008 at 05:26 AM. Reason: Automerged Doublepost
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Old Feb 24, 2008 | 05:32 AM
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GMS2, CAI, Corsa Touring are my performance mods. cool, i'll keep that in mind to double-check the gap!
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Old Feb 24, 2008 | 05:45 AM
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Originally Posted by sneaky
the general issue is that it's too much spark plug for the coil packs. Because it utilizes more of a powerful spark than the coil can take it fries the cables or the coil pack itself. Keep the stocker plugs in, trust me at this point in the ball game unless your just changing the gapping of the plugs, a different plug all together won't net anything for you.
wtf?

Isnt a plug just a controlled short? the spark plug's job is to act like two wires arc'ing... thats it! the only difference between one brand and another is the material used and other minor gimics, in this case four 'legs' rather then one... theres nothing a plug does that would create a "more powerful spark" than the amount of energy given to it...
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Old Feb 24, 2008 | 06:04 AM
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Originally Posted by bigworm
wtf?

Isnt a plug just a controlled short? the spark plug's job is to act like two wires arc'ing... thats it! the only difference between one brand and another is the material used and other minor gimics, in this case four 'legs' rather then one... theres nothing a plug does that would create a "more powerful spark" than the amount of energy given to it...
Bosch Platinum +4 Spark Plugs are designed with a revolutionary firing technology that provides multiple spark paths to deliver the most powerful spark. With four ground electrodes, not only does the spark find the most efficient path, but it is longer and more powerful with less interference and optimal access to the fuel/air mixture. Bosch Platinum +4 adds 75% more pure platinum to its center electrode, providing longer life and optimal performance to the spark plug. With Bosch Platinum +4 Spark Plugs you'll get quicker starts, smoother acceleration, and improved fuel efficiency.


That's quoted from a auto website.. garbage IMO..

http://www.howstuffworks.com/ignition-system2.htm How the ignition system works in a nut shell.. you are sorta correct..

Originally Posted by xravenwingsx
GMS2, CAI, Corsa Touring are my performance mods. cool, i'll keep that in mind to double-check the gap!
I told a friend of mine to gap his at .32 for his S2 setup. It's running great. He had his set at .40 and it was running like poo, plugs kept fouling out. Keep that one in mind.

Last edited by 3fo893013L; Feb 24, 2008 at 06:04 AM. Reason: Automerged Doublepost
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