Spark plugs

I run stock replacements and never had a problem yet.

just get the standard denso's, or ngk's. I'm using ngk and they're great.

I used Bosch Platinum 4s. They work great for me.

Originally posted by Chico222
I used Bosch Platinum 4s. They work great for me.

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you shouldnt be using those

How can you tell if you need to replace your spark plugs?

Chelica said:

How can you tell if you need to replace your spark plugs?

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Car runs like crap and eats gas. Stumbles and hesiitates alot, idles poorly, and it isn't as fast.

Back on topic, so nobody tried a colder plug?

Originally posted by 00silverGTS6spd
you shouldnt be using those

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why is that mike?

stock is iridium, so there for you shoudl use iridium. theres a couple of people using platnums or coppers, but theres a specific reason not to you platnums. like they heat up faster or something, i forgot.

any spark plug will work... the only reason makers tell you to use platinum or iridium on some engines, it's simply to warrant a longer service interval... of course, high power ignition systems/coils will wear out the weaker metals faster, so an iridium plug will probably last longer than a platinum one, and both of these will outlast copper...
R

BadTOYO said:

any spark plug will work... the only reason makers tell you to use platinum or iridium on some engines, it's simply to warrant a longer service interval... of course, high power ignition systems/coils will wear out the weaker metals faster, so an iridium plug will probably last longer than a platinum one, and both of these will outlast copper...
R

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:werd:

Iridium plugs are also much more efficient in energy transfer:

http://www.densoiridium.com/voltagerequirements.php

Fewer Volts Means More Amps

DENSO Iridium spark plugs require on average 5,000 fewer volts to fire than conventional spark plugs.

Less power is required to fire DENSO Iridium Power Plugs, and coupled with our patented U-Groove technology, the use of Iridium alloy, the tapered cut, and the ultra fine 0.4mm diameter electrode translates to increased horsepower throughout the dyno range.

"It takes 5,000 volts less to fire a DENSO Iridium Power spark plug versus a conventional platinum spark plug.

-SAE Technical Paper Series
March 1-4, 1999

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Notice how they don't compare to copper plugs...

I haven't seen any evidence thus far that states the benefits of a smaller iridium electrode outweigh the MASSIVE difference in conductivity between copper and platinum. Conductivity plays a key role in voltage demands as well.

The V-Powers also have the "V" groove technology (just a different letter) that translates into better spark jump/induced flamefront.

what is the rating of the stock 1zz plugs?

Sorry to bump my own thread but,
nobody has tried a 1 range colder plug on stock/near stock car?
In theory, it would make our cars less prone to detonation, but would they foul?
I drive pretty hard most of the time, and most of my trips are 20min or more,
does anyone think i could get them to cleaning temp on a reg basis.
Also, i was told that denso's are better than ngk's, any truth?

Because the plugs aren't burning up or causing pre-ignition. A colder plug would just foul sooner on a stock setup. I like the Denso iridium power plug. The pos. electrode is smaller than the standard iridium and takes less energy to fire than any copper or other available plug.

i use NGK laser iridium and haven't noticed a difference from the stock plugs, except for the uber pricing of the NGK's. i'll be getting the denso's next time

Has anyone heard of silversode?