2quik

what type of spark plugs do you guys recommend on a 99 prelude, ngk iridium or platinum or denso iridium? and where to buy ? thanks in advance

The Weather Man

I recommend NGK - but that's just my opinion. I suggest doing a search on google for user reviews and such. What are your goals....any mods?

DJ_SaNdOz

Platinum is stock for the VTEC models, and you can get them all over. partsquest, inlinefour, autozone, pep boy's, etc. Pricing for NGK Platinum will fall somewhere between $40-$50 usually in my experience.

2quik

which ngk, platinum or iridium?

DJ_SaNdOz

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2quik &raquo;</TD></TR><TR><TD CLASS="quote">which ngk, platinum or iridium?</TD></TR></TABLE>

Platinum

2quik

do u know size of the socket ill need to get them out , is it 5/8 with a socket extension right? its a deep socket

optikal_blitz

i believe it's 5/8 yea, but spend the extra few dollars at autozone to get a sparkplug specific one. it just makes things easier

DIRTYsouthBB6

The only benefit of platinum-tipped spark plugs is that they last longer than copper or iridium plugs. If you do not mind paying extra money and increasing your change intervals, then I like the Denso iridium spark plugs.

Iridium is a very pure metal. The purer the metal used in a spark plug, then the smaller the electrode has to be. If you take an iridium spark plug and compare it to a copper or a platinum plug, you will notice that the electrode on the iridium plug is about four or five times smaller than that on the copper or platinum plug. What does this mean? Basically, it means that it takes less igniton voltage to ignite the air-to-fuel mixture when running an iridium plug as compared to using a platinum plug.

Just for the record, the Denso iridium plug has the smallest electrode made. It is a 0.4-mm electrode... the electrode on the NGK iridium plug is 0.6-mm.

Whichever you choose, remember to stay within the right heat range. If your motor is stock or near stock, then stay with the factory-used heat range. The higher the number on the plug, the colder the plug.

eMpAtHy

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DIRTYsouthBB6 &raquo;</TD></TR><TR><TD CLASS="quote">The only benefit of platinum-tipped spark plugs is that they last longer than copper or iridium plugs. If you do not mind paying extra money and increasing your change intervals, then I like the Denso iridium spark plugs.

Iridium is a very pure metal. The purer the metal used in a spark plug, then the smaller the electrode has to be. If you take an iridium spark plug and compare it to a copper or a platinum plug, you will notice that the electrode on the iridium plug is about four or five times smaller than that on the copper or platinum plug. What does this mean? Basically, it means that it takes less igniton voltage to ignite the air-to-fuel mixture when running an iridium plug as compared to using a platinum plug.

Just for the record, the Denso iridium plug has the smallest electrode made. It is a 0.4-mm electrode... the electrode on the NGK iridium plug is 0.6-mm.

Whichever you choose, remember to stay within the right heat range. If your motor is stock or near stock, then stay with the factory-used heat range. The higher the number on the plug, the colder the plug.</TD></TR></TABLE>

VERY informative post. welcome to honda-tech. to you.

DIRTYsouthBB6

Thanks empathy... I like that dancing banana.

DJ_SaNdOz

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DIRTYsouthBB6 &raquo;</TD></TR><TR><TD CLASS="quote">Thanks empathy... I like that dancing banana.</TD></TR></TABLE>

So according to your thought process; using Platinum plugs over standard plugs has no benefit other than lengthing the change interval? Is that accurate?

I can honestly say that i am not the most knowledgeable on this subject. I have heard similar theories else where, but I never really looked into it. if that's teh case, I may as well stick to standard plugs since I tend to change them much sooner than most folks.

TIA

lxdsmxl

NGK's

PrettyLude

ngk-r's