Quick spark plug fix
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Joined: Apr 2002
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From: SF Bay Area
Quick spark plug fix
What's a good brand/type of spark plug to use say from Kragens or Pep Boys? The dealer has closed and it'll take a while to get them and I need to change them tonight.
Currently I'm using all 9s. But I maybe tempted to use all 10s for temporary. My mods: cb/air filter/dp/m2 ecu. 10s should work fine right?
Thanks. Dan
Currently I'm using all 9s. But I maybe tempted to use all 10s for temporary. My mods: cb/air filter/dp/m2 ecu. 10s should work fine right?
Thanks. Dan
Joined: Oct 2001
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From: My 350Z Roadster kicks my RX7's butt
I doubt they will have any other heat ranges other then 7 & 9 and the platinum will be special order. Just get the copper 9's. Why do you want 10's with only bolt on mod's? Kragen should have them in stock. If you're replacing them yourself then you're not loosing money for install cost when you have to replace alot sooner.
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From: My 350Z Roadster kicks my RX7's butt
Originally posted by EviLPeNeviL
10s have a colder spark. Bolt on mods are still mods, running very very rich. This is only for temp use.
Thanks for the replies.
-Dan
10s have a colder spark. Bolt on mods are still mods, running very very rich. This is only for temp use.
Thanks for the replies.
-Dan
Air/Fuel Mixtures seriously affect engine performance and spark plug operating temperatures.
* Rich air/fuel mixtures cause tip temperature to drop, causing fouling and poor driveability
Fouling
Will occur when spark plug tip temperature is insufficient to burn off carbon, fuel, oil or other deposits
* Rich air/fuel mixtures cause tip temperature to drop, causing fouling and poor driveability
Fouling
Will occur when spark plug tip temperature is insufficient to burn off carbon, fuel, oil or other deposits
I put cold iridium's in my CRX and it was harder to start and going through the grapevine the temp was actually below cold.
SPARK PLUG BASICS:
The spark plug has two primary functions:
To ignite the air/fuel mixture
To remove heat from the combustion chamber
Spark plugs transmit electrical energy that turns fuel into working energy. A sufficient amount of voltage must be supplied by the ignition system to cause it to spark across the spark plug's gap. This is called "Electrical Performance."
The temperature of the spark plug's firing end must be kept low enough to prevent pre-ignition, but high enough to prevent fouling. This is called "Thermal Performance", and is determined by the heat range selected.
It is important to remember that spark plugs do not create heat, they can only remove heat. The spark plug works as a heat exchanger by pulling unwanted thermal energy away from the combustion chamber, and transferring the heat to the engine's cooling system. The heat range is defined as a plug's ability to dissipate heat.
The spark plug has two primary functions:
To ignite the air/fuel mixture
To remove heat from the combustion chamber
Spark plugs transmit electrical energy that turns fuel into working energy. A sufficient amount of voltage must be supplied by the ignition system to cause it to spark across the spark plug's gap. This is called "Electrical Performance."
The temperature of the spark plug's firing end must be kept low enough to prevent pre-ignition, but high enough to prevent fouling. This is called "Thermal Performance", and is determined by the heat range selected.
It is important to remember that spark plugs do not create heat, they can only remove heat. The spark plug works as a heat exchanger by pulling unwanted thermal energy away from the combustion chamber, and transferring the heat to the engine's cooling system. The heat range is defined as a plug's ability to dissipate heat.
http://www.ngksparkplugs.com/techinf...000&country=US
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