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Re: a hotter ignition coil and other ignition questions
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Posted by vvack0matic [Email] (#1443) [Profile/Gallery] (more from vvack0matic) on Fri, 27 Apr 2007 20:40:19 Share Post by Email
In Reply to: a hotter ignition coil and other ignition questions, Steven W, Fri, 27 Apr 2007 18:42:05
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if its a hotter spark from your plugs is what your after,
i would suggest changing the plugs from a ..es7 to a ..es5 that would allow a larger flow of current from the coil.

just a warning if the need to change to a larger plug (hotter plug) is because the motor has been tweaked to allow maximum gas flow at full load
and it has been found that the excess gas is not being burned efficiently to produce the extra hp that should be there.

then i can understand why the need would be there to find the hotter ...es6 or ...es5.

but if no mods have ben done to the motor in the area of improving the gas flow and if the es6 or es5 are installed to allow a hotter burn
when the motor is boosted the turbo unit will do its job and so will the hotter plugs. let me break it down
as the turbo unit builds air pressure it pumps it into the champers
leaning out the air/fuel ratio which makes for a hotter burn.
why the es7 are used is just for this matter of a/f ratio at full load.
the es6 plug would be fine if the motor was never boosted, i would not recommend it but they would work. if the motor was boosted on this plug with no mods to the fuel the heat spike in the chambers at full out boost would be so astronomice the knock sensor would shut it down.
if for some reason the knock sensor malfunctioned it would be common for a hole to end up in the piston or a valve melted.
if the es5 plugs were used to allow the current from the coil to flow even more, with no mods to the gas,.... well i dont think the knock sensor would allow the motor to boost at all. just because the chambers are so hot before boost.
the air fuel ratio is critical for what plug is used, just having the state of the art coil, you would know it will work no matter what.
and it would be needed when mods are done to the fuel injectors, a 3.0 fuel bar, tweaked cpu fuel chip.
all this needs to be done so the motor will have excess fuel at full load.
if this was done with maximum fuel flow with the es6 it would leave your eyeballs smashed in the back of your eye sockets.

just one thing ill recommend, ngk came out with a plug 7eix the iridium plugs they are made just for a motor that has a turbo.
when the motors air fuel mix is leaned out under boost conditions normal plugs tend to have a hard time firing in the environment which leads to one misfiring triggering the knock sensor to shut the boost down.
the eix`s are made for the leaned out mix and will fire with no problem under the conditions. just one note, if you find yourself with a set of the iridium plugs only gap them if they really need it,
the iridium needle can snap very easy when the gap tool is used, leaving the 7 dollar plug worthless.
fine tuning the motor with parts that are able to endure boost conditions can only be the first step. the super coil wouldnt be needed until the gas flow has been mod-ed to the max.





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