5303 or 5304? ive searched and nothing really on the subject of this motor. are iridium plugs recommended? any problems?

 

I've been running Denso Iridiums for some time now and they run beautifully, never the slightest hint of a problem. I'm not sure if they are the 5303 or the 5304 plugs though, a friend got them for me and said they should work, and they have.

 

I've used IK24 (this is 1 step colder than stock) or IK22 which is basically the same heat range as stock.

 

i have them in my engine and are great cant remember the number right now but if you pm me to remind me ill look it up in the morning. i figure since im making 177 at the wheels in a pretty close to stock r motor that they are working pretty damn good

 

Here's a sidenote on this issue ... I saw on Ebay that Denso Iridiums cost TWICE what NGK Iridiums cost. Does anyone know why this is ?? I am needing a set of new plugs for my ITR very soon and even though a lot of people swear by OEM plugs, I'd like to know if Iridiums are worth the try...

 

My personal experience: I popped one of 'em at the track during hard practice. I went back to the good ol' stock NGKs and not problems after that.

 

so you didnt like the iridium plugs?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Eric's R &raquo;</TD></TR><TR><TD CLASS="quote">My personal experience: I popped one of 'em at the track during hard practice. I went back to the good ol' stock NGKs and not problems after that.</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18crx &raquo;</TD></TR><TR><TD CLASS="quote">so you didnt like the iridium plugs?

</TD></TR></TABLE>

Well, after I spent that money I spected a lil more reliability. Although, you can feel a little improvement in the throttle response when they're brand new.

Note: These are only butt dyno assumptions...

 

Ok ... I'm going to give these Iridiums a shot and see how they work ... I have a doubt though... If you look on http://densoiridiumpower.com/findmypart.php

you'll see that the recommended plug for 2001 ITR is the IK20 ... you guys are using K22 and k24 ?? what's the deal ?? I am running stock engine with a Sponn 2-ply gasket and bolt-ons (4-1 header, intake, pulleys, sprockets, etc.)