Spark Plugs???

snooky

Member
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Mazdaspeed6 GT
So im not too knowledgeable with engine stuff, but i was wondering, if I were to change my spark plugs would it benefit the car at all, in terms of performance?

and if so what brand should i get?

SnOoKy~
 
That depends on a number of things. Many people, including myself, have seen the benefits of going to a plug that is one step colder. It helps to reduce detonation/engine knock.

I've read elsewhere that you want to stay away from platinum-based plugs on a turbocharged car. Stick to copper or iridium-based. Look at Denso and NGK as far as brands go.
 
if you are stock or basically stock then the only time you will not really benefit unless your plugs are old, dirty, or fouled.
 
Even at stock, I would recommend one step colder. The benefit of protecting your engine from possible detonation is just too hard to pass up.

The ones we typically use are Denso ITV22's. Protege Garage has them for like ~$45/set shipped for free. Just make sure you check the gaps on them before you install. Also, they cannot be gapped like other plugs, you cannot leverage on the electrode to open up the gap. You must pull back on the arm itself.
 
K i have no clue what you just said, hehehe> but my car is not stock, i meant those options you gave me were better than the stock plugs the car came with? thank you though, but i think im gonna just get my mechanic to change them...


Even at stock, I would recommend one step colder. The benefit of protecting your engine from possible detonation is just too hard to pass up.

The ones we typically use are Denso ITV22's. Protege Garage has them for like ~$45/set shipped for free. Just make sure you check the gaps on them before you install. Also, they cannot be gapped like other plugs, you cannot leverage on the electrode to open up the gap. You must pull back on the arm itself.
 
just make sure your mechanic doesnt change them with the regular 6 plugs/specs
 
Just tell your mechanic to "gap them at 30" and you'll be okay.

just one more Q? correct me if im wrong, but doesn't the bigger the gap the result in bigger the boom? wouldn't that make it faster?

again i know nothing about this stuff...
 
the bigger the gap the more voltage required. When you make the gap bigger you do increase the amount of fuel and air that comes in contact with the spark which essentially makes the combustion easier. However, like anything, too much of anything is never a good thing and a gap that is too big can cause a condition where it is too easy to ignite.
 
the bigger the gap the more voltage required. When you make the gap bigger you do increase the amount of fuel and air that comes in contact with the spark which essentially makes the combustion easier. However, like anything, too much of anything is never a good thing and a gap that is too big can cause a condition where it is too easy to ignite.

okay thanks bro~
 
Most vehicles won't see knock at a stock or close to stock level. If you're running a retuned vehicle (AP or Standback), then you are more likely to knock, as your boost targets may be higher, pushing the turbo out of it's intended efficiency, which causes the BAT to go up and induce knock to your system.

This can be tuned out using ATR or a good dyno/street tuner. Reducing boost targets or pulling some timing in the tables for each gear you're seeing knock will also help.

Long story short, go with stock or ITV22s and gap them at .030. This is something, like changing your oil, that you should know how to do. I'd learn real quick how to change them yourself.
 
Most vehicles won't see knock at a stock or close to stock level. If you're running a retuned vehicle (AP or Standback), then you are more likely to knock, as your boost targets may be higher....

i agree i really should learn
 
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