spark plugs.
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From: prince george, va
lol ok i picked up a set of the ngk iridum plugs today and now i have some rocket scientists at work that bet me 50 bucks that i needed to gap these plugs to .035. i told them that those plugs dont need to be gapped, just drop them in right out of the box. so would someone tell me if im right or wrong. if im wrong, ill bow down and be out 150 bucks lol
Last edited by mcfisher1980; Jan 7, 2009 at 01:25 AM. Reason: spelling
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Joined: Sep 2008
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From: Northern California
From NGK:
FAQs - Spark Plugs
Q: Do I need to set the "gap" when installing a new set of plugs?
A: Maybe. A spark plug part number might fit hundreds of different engines from many different manufacturers. Although the NGK factory will set the gap to a pre-selected setting, this may not be the right gap for your particular engine. The incorrect plug gap for your engine can contribute to a high rate of misfires, loss of power, plug fouling, poor fuel economy, and accelerated plug wear. It is always best to check the gap against the manufacturer's specifications. If adjusting the gap on fine wire or precious metal plugs such as platinum or iridium be very careful not to apply any pressure or prying force to the fine wire center electrode or insulator as they can be damaged. The gap should be adjusted by only moving the ground electrode.
Another consideration that should be taken into account is the extent of any modifications that you may have made to the engine. As an example, when you raise compression or add forced induction (a turbo system, nitrous or supercharger kit) you must reduce the gap (about .004" for every 50 hp you add). However, when you add a high power ignition system (such as those offered by MSD, Crane, Nology) you can open the gap from .002-.005".
If you have any questions, please contact the NGK Sparkplugs Tech Staff:
Tech Support - Click here
The manufacturer of your vehicle, the company that produced the aftermarket products you've used and/or your mechanic are all additional sources of gapping information if you've modified your vehicle.
Q: Do I need to set the "gap" when installing a new set of plugs?
A: Maybe. A spark plug part number might fit hundreds of different engines from many different manufacturers. Although the NGK factory will set the gap to a pre-selected setting, this may not be the right gap for your particular engine. The incorrect plug gap for your engine can contribute to a high rate of misfires, loss of power, plug fouling, poor fuel economy, and accelerated plug wear. It is always best to check the gap against the manufacturer's specifications. If adjusting the gap on fine wire or precious metal plugs such as platinum or iridium be very careful not to apply any pressure or prying force to the fine wire center electrode or insulator as they can be damaged. The gap should be adjusted by only moving the ground electrode.
Another consideration that should be taken into account is the extent of any modifications that you may have made to the engine. As an example, when you raise compression or add forced induction (a turbo system, nitrous or supercharger kit) you must reduce the gap (about .004" for every 50 hp you add). However, when you add a high power ignition system (such as those offered by MSD, Crane, Nology) you can open the gap from .002-.005".
If you have any questions, please contact the NGK Sparkplugs Tech Staff:
Tech Support - Click here
The manufacturer of your vehicle, the company that produced the aftermarket products you've used and/or your mechanic are all additional sources of gapping information if you've modified your vehicle.
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Joined: Jan 2008
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From: Lima, OH
I'm running ngk iridiums with msd coil and some kind of wires since i was dumb and bought wire and coil set for srt4 so my wires won't work. If anyone wants msd 8.5mm for srt4 i got a set or if you build a bracket to move your coil closer to the plugs which would then create less resistance with shorter wires.
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From: prince george, va
installed the ngk iridium plugs today. havent really noticed any difference other than the idle. seems it smoothed out even more then it did when i originally put the msd coil pack/wireset on with the old ngk v-power plugs
Last edited by mcfisher1980; Jan 10, 2009 at 11:15 PM. Reason: spelling
