Spark Plug heat range
04-07-2003, 03:01 PM
#1
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Spark Plug heat range
So I've been doing some reading and have a question or two on proper heat range for spark plugs. Everything I've read and heard about superchargers calls for a 1 to 2 step colder plug. How about in an N/A application? Trying to figure out proper plugs to run on a friend's car. I'm just trying to understand how the whole heat range thing works. My friend's car is all motor: close to 11:1 compression, port and polished head, cam, intake, header, exhaust, adjustable fuel pressure regulator, etc. We know it still needs further tiing and fuel enhancements, but what kind of difference in heat range (if any) plug should he be running? The engine's been eating plugs (stock) and just trying to make sure they are the right plugs before we write it off to the car needing the afore mentioned fuel/ignition upgrades. TIA!
07-25-2004, 07:03 PM
#2
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Car Info: 02 Impreza WRX sedan
You can begin by telling us what type of car/engine your friend has. Is it a Suby? What type of mods? What do you mean when you say "eating plugs"?
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"…axles of evil…" - george w. bush
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0==WW==0
"…axles of evil…" - george w. bush
07-25-2004, 07:05 PM
#3
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Car Info: 02 Impreza WRX sedan
Even with the above listed mods (if it's a Subaru engine or not), many engine builders would go with one step colder plug. However, if the plugs are fouling due to street driving a colder plug might not be the answer. Is it a track car, meaning road race or drag use, only?
--
0==WW==0
"…axles of evil…" - george w. bush
--
0==WW==0
"…axles of evil…" - george w. bush
08-02-2004, 01:39 PM
#4
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Car Info: 02' Black Wgn
Be carefull
I purchased some bosch platinums that were recomended as an upgrade and the heat range was all wrong. They detonated in the motor and the fine folks at Kragen purchased me a brand new ej20. =) It was a pain in the neck however.
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