my car came stock with NGK iridiums. 03 Accord. NGK does not make a plug two steps colder that's still an iridium plug, so I've moved to denso. I'm trying to size their iridium plugs and the scale has me a little confused. tech's not open right now and I want to know.

I'm looking at IK20 as stock replacement, is the IK22 2 steps colder or the IK24? Their scale raises by even numbers except for a special IK21 plug listed. That IK21 is throwing a wrench in the scale.

http://www.iridiumpower.com/identifyplugs.htm

 

if ou pick up the next issue of OverRev Magazine at your nearest race shop, it will supply you with the exact information you are looking for. To answer your question, this is directly quoted from the tech guru at denso, you only need to go one step colder if you are gaining about 75-100 horsepower. so for every 75-100 hp you go a step colder. Look up your stock replacement part number and then go a step colder form there...

 

thanks I was going 2 steps for 100 hp gain, but if that's true cool.

 

yeah one step lower would be perfect..... two steps down will foul up your spark plugs for sure

 

ngk does have different heat ranges for your car in iridium! Where have you been looking?

 

off their website and several car parts stores referencing their books. stock is a IZFR6K-11, so I would want a NGK IZFR**7 or 8**K-11

????

 

you can run any of these:

bkr6eix-6418 hotter
bkr7eix-2667
bkr8eix-2668
bkr9eix-2669 coldest

 

are those NGK's? and are they iridium?

thanks for the info

 

yes they are NGK and they are iridium!

 

denso is the best spark plug you can get.... the iridium electrode is a lot smaller and is a lot stronger than ngk's... theres a reason why a lot of pros run the Densos and not the ngk's

 

called NGK tech, excellent help. and thanks DRAGLS, you were on the money.

 

glad to help, I have their catalog, u should call back and order one their FREE!

thats were i get all my plug info

 

2fastxeg,

were you referring to the nitrous article in overrev? nothing new there, but I seem to missing something mentioning plugs.

thanks for the info