how often do you guys change your spark plugs. i use NGK copper ZFR7F-11, anm ive heard about 10,000 miles then change. is that true? i have a 5th gen lude.

 

Errr... brain fart - I'm not boosted, so I'd say change yours at least as often as you're changing them, if not sooner.

They're cheap as hell, and it definitely lets you keep on top of how your motor is running. No point in stretching something out that's so freakin' cheap and vital to your motor's function.


[Modified by Def, 10:25 PM 9/2/2002]

 

true. but still like to know other peoples opinion. thanks though

 

Just change them when you feel they have lost power. Otherwise you should be cool. I've done alot of R&D on spark plugs and found them to work best after a month of running them so brand new is not nessarily better.

 

ttt

 

can you prove that?

i change mine every month.

 

I change mine every other oil change and sometimes sooner.

 

hmmmmm maybe i should change mine? cant remember the last time

 

Thats been my experience. I might have some dyno proof in the near future.

 

thanks maybe its time to change mine again/

 

I agree I have ZEX Turbo/Nitrous plugs and they have been in about a month now....must say that they feel a bit stronger now.

 

i've heard some scary chit about those zex plugs dropping electrodes
and killing motors -- justa word of caution

 

Ok heres a quick question, i know everyone one uses, the mgk bk7res11 or some thing like that, but i need some plugs supa fast for the dyno tomorrow, and i dont have time to get some ordered. is there anything else i can get? that is colder than stock for a 8to1 compression b16 running 14-20psi of boost? via hondata of course. thanks guys

 

Ditto...

 

Thanks dude. More often than not it seems like the engine looses a little pep when I change the plugs.

 

there has already been a dyno with new plugs and you do indeed loose some power. I wonder why that is?

 

There has to be a little crud that promotes flame kernal growth. New plugs don't have the crud.

 

That's interesting, because I've seen dyno's that say otherwise (comparing old vs. new and "fancy"; POS 4 electrode Bosch among others)...maybe we should hold them in a flame before putting in new plugs

 

however, there is also the unrecognized fact that the crud can also prevent the spark plug from supplying a strong spark.

 

Olympic Import Parts carries them in stock in. I never have to order them, in and out in 5 minutes.

 

me too, about every 10K

 

thanks for all the info.

 

also how can you tell your spark plugs are about to go. i heard they misfire.
so if there about to go will you feel a lag in boost?