I have a 96 b18C-R with a spoon s layer headgasket and supertech flat top valves. I keep getting mixed answers about what heat range I should use. Here's some more info about my motor:

Skunk2 stage 2 cams, skunk 2 titanium valve springs and retainers, skunk2 adjustable cam gears, rc 310 injectors, AEM fpr, hondata im gasket, Toda 421 header, walbro 355 lph fuel pump, hondata s100 P28 ecu.

Thanks for your help!

 

i use NGK #8.

 

stock JDM = NGK #7, so you can go for #8.

 

Thanks! Does anyone know a good place to purchase them? All the local auto parts stores only sell the 7's. Should I stick to the double platinums or the iridiums? They both cost the same. I heard the iridiums last longer.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dwnthehatch &raquo;</TD></TR><TR><TD CLASS="quote"> I heard the iridiums last longer.</TD></TR></TABLE>
That's correct for the versions with Iridium tip + platinum ground.

 

Ok, I just got off of the phone with NGK Technical Support. They recommended that I get the BKR8EIX iridium plugs over the double platinums. I guess I'll try them out.

 

"8" range???

 

http://www.kingmotorsports.com...ngine

We keep #7 and #8 plugs on the shelf.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bbasso &raquo;</TD></TR><TR><TD CLASS="quote">"8" range???</TD></TR></TABLE>

Yes 8. It's a JDM ITR motor that requires the 7 range. I bumped the compression with a 2 layer spoon head gasket and supertech flat top valves. I keep getting mixed answers on which plugs to get since the compression bump. Some say 7 most say 8. I guess there's only one way to find out.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dwnthehatch &raquo;</TD></TR><TR><TD CLASS="quote">Ok, I just got off of the phone with NGK Technical Support. They recommended that I get the BKR8EIX iridium plugs over the double platinums. I guess I'll try them out.</TD></TR></TABLE>
Don't get that one. That's the version without platinum tipped ground, just like the Denso IK plug.

If you want Iridium center + platinum ground, get the IFR7G-11 or IFR8G-11 if this one exists.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DutchITR1689 &raquo;</TD></TR><TR><TD CLASS="quote">
Don't get that one. That's the version without platinum tipped ground, just like the Denso IK plug.

If you want Iridium center + platinum ground, get the IFR7G-11 or IFR8G-11 if this one exists.</TD></TR></TABLE>


They don't make a IFR8G-11. Are there any other choices? Will the 7G-11's be ok with my compression? This is becoming a pain in the ***!

 

going a little off topic now but:

say... if you have tuned the A/F ratio on your car... with 7degree plugs and you decide to use 8 degree plugs... would you gain/lose/even power?

 

I'm using Denso IK22 in my 96spec ITR which are heat range 8 and gapped to 0.8mm (as standard) but i have them gapped to 0.9mm and have no problems with them.