Iridium Spark Plug ?

[SaNibOy]

What car model and yr is your ride?

 

 

4 year old kia cerato bro......

[Celicagt42010]

do you guys know iridium is one of the worst conductors both electrically and thermally.

 

its only used because of its long life.

 

why not use a better plug like Brisk Silver LGS.

 

Silver is the best conducter while Copper is 2nd.

 

If you want performance thats the way. Its been proven by dyno.

 

Electrically conductivity does not matter actually, and neither does thermal conductivity.

 

Plug wires and spark plugs have high resistance (5K ohms for spark plugs) in order to cut down electrical noise which may affect the electronics.

 

If you really want more power for your spark plugs, choose those w/o an internal resistor. But it may cause problems for the car.

 

As for thermal conductivity, its the heat range of the plug that matters.

 

[Trex101]

4 year old kia cerato bro......

 

You need a 1.1mm spark plugs gap.

[Yuan]

Electrically conductivity does not matter actually, and neither does thermal conductivity.

 

Plug wires and spark plugs have high resistance (5K ohms for spark plugs) in order to cut down electrical noise which may affect the electronics.

 

If you really want more power for your spark plugs, choose those w/o an internal resistor. But it may cause problems for the car.

 

As for thermal conductivity, its the heat range of the plug that matters.

 

I was initially quite concerned as I am using iridium and platinum spark plugs.

[Raindanze]

Just buy those cheap copper plugs at few dollars each and change every 20K.

 

Agree. Yes, Iridium can last 40,000 km but at 30,000km, are they able to perform as well as at 10,000km?

[Suv8]

pls take note normal denso iridium can last 40k only. if using normal copper sparks can last 30k.

 

normal ngk iridium can last 60k. makes more dollar & cents to buy normal copper or ngk iridium instead

 

 

My previous Grand Vitara ran on original denso iridiums for 120,000 km before I sold the car.

 

Current car ran denso iridiums as factory originals, changed at Autobacs at 75k km. They still looked perfect after removal but changed them as experiencing slight vibration on idling whilst in "D". New iridums super smooth idling again, quick aceleration.. didnt realise old ones were worn with widening gaps. Perhaps I should have adjusted the gaps and use them for another 20k km before throwing them away.

 

I believe they can last up to 100k km easily.

[Celicagt42010]

Agree. Yes, Iridium can last 40,000 km but at 30,000km, are they able to perform as well as at 10,000km?

 

Whether the plugs can last depends more on your engine though. If your engine is running too rich or too lean or you are using the wrong heat range, then your plugs will foul very fast and won't last.

 

If your engine is running well, then even 100K also no problem. You just need to periodically clean off the carbon deposits (perhaps once every 20-30K) and check the gap.

 

The main cause of performance degradation is due to increase in plug gap. As the materials wears out, the gap increases and it will cause misfire. So, measure the gap and regap if necessary.

 

The downside to doing this is that workshops won't get to earn your money.....

[SaNibOy]

You need a 1.1mm spark plugs gap.

 

 

Thanx bro. So far i've NEVER check the gaps. Now then i'll start doin it.

[Lingamair]

Hi guys, does anybody know a stockist for NGK Iridiums? I bought a set from m---------s but my service shop told me they're not compatible with my car, so need to get another set. I've got the exact model number, but where can I get them from?

[Trex101]

Hi guys, does anybody know a stockist for NGK Iridiums? I bought a set from m---------s but my service shop told me they're not compatible with my car, so need to get another set. I've got the exact model number, but where can I get them from?

 

What car model and year is your ride and what part number did you get? If it's the wrong part number, just bring back to mx tradings and exchange for the correct part number, no worries.

 

[SaNibOy]

Another question for gurus here;

 

After using our plugs, the gap wil increase or vice versa?

[Trex101]

Another question for gurus here;

 

After using our plugs, the gap wil increase or vice versa?

 

Every sparks that fired will cause a minute amount of erosion on both the centre and ground electrode. So yes, spark plugs will only increase in gap and not decrease.

[Celicagt42010]

Another question for gurus here;

 

After using our plugs, the gap wil increase or vice versa?

 

Under normal conditions, the gap will increase. However, the gap may reduce if fouling occurs (due top deposits). This will cause misifiring. A good FAQ on reading spark plugs.

 

http://www.ngksparkplugs.com/tech_support/...aqs/faqread.asp

[Chiangauto]

DENSO (Japan) has started the OEM supply of Iridium Spark Plugs (SC20HR11 and FK20HR11) for the Toyota Corolla.

 

The SC20HR11 has a 0.7mm-diameter Iridium center electrode and a platinum pad on the ground electrode. The thread diameter is 12mm with a length of 26.5mm, and a 16mm hexagon.

 

The smaller diameter of the Denso centre electrode means that less wear can take place before the plugs' optimum service life is exceeded and the ground electrode to allow performance to be maintained for a much longer service life (up to 60000 miles). These plug types are usually recommended for high power turbo charged engines where wear may otherwise be accelerated.

[Laoma]

Hi guys .. Just wondering if changing the plugs result in increase performance ?? =)

[Kelpie]

Hi guys .. Just wondering if changing the plugs result in increase performance ?? =)

 

Nope, doubt there is noticeable increase in horses/torque.

 

Regards,

[Hermes_1]

Hi bros,

 

Wanna check in your opinion or experience which spark plug is better?? The denso iridium or the ngk iridium power??

 

Thks!

[Yuan]

Hi bros,

 

Wanna check in your opinion or experience which spark plug is better?? The denso iridium or the ngk iridium power??

 

Thks!

 

In my opinion, there is not much difference between the two.

 

Just proceed to use.