Like the title says, I'm finally getting around to nabbing some new spark plugs for the Seven as she gets closer to being cranked over. Searched the form under all the usual terms; "best spark plug, NGK, BUR7EQ, BUR9EQ, ect.


This brought up a good amount of information but then I noticed some people saying to use BR8EQ-14, B9EGV, BR7ET, BR10EGV...

My question is, what in the bloody hell does it all mean!? I haven't found anything using the search button that describes what the actual part number makes up. The best I have come up with is;

BUR [<- got no clue what that means...] 8 [<- Heat range?] EQ [<- H2IK..] -14 [<- Thread]

So any of you guys got the super secret decoder ring? I can't find my in my cereal.

 

Try entering some of the spark plug numbers on this website.

http://sparkplugs.com/Default.asp

They give explanations of each type of sparkplug, and explain its strengths and weaknesses. The information on this site, while simple, has been some of the best spark plug information I have ever run across. Put in a couple of NGK numbers and start reading. You can click on all kinds of stuff for better explanations. Plug gaps, grounding, electrode types, and on and on and on....

 

not sure what all of it means but i do know the number in the middle is heat range. i believe it's the higher the number the colder the plug.

B=14mm thread
U=surface discharge type
R=resister
8=heat range(higher-colder)
E=19mm thread reach
Q=4 ground electrode
14=1.4mm(.055in) gap

above decoding from this .pdf:
http://www.ngksparkplugs.com/docs/te...bols_plugs.pdf

been able to find answers to quite a few questions asked on here with google.

 

thats right, with the the additions

P is platinum, bureq is a normal copper plug, bureeqp is the same in platinum

I is iridium. so BRUEQI would be iridium.

IMO plug choice depends on the engine and ignition system.

mazda's testing shows that the racing style plug has less misfires, and makes more power than the FC style plug. the Rx8 plugs are the racing design in a normal heat range, so if the budget allows these are probably the best choice.

 

Got an nkg part number for the rx8 plugs?

 

Cool, Yeah I was trying to figure out what Platnium and Irdium versions would be listed as and just curious of you would decode that part number, Thanks guys!

 

Leading - RE7CL
Trailing - RE9BT

 

If you do not mind paying $7 a whack for plugs, go with the iridium. Don't forget the narrow/thin 13/16 socket if you are installing them in your FB.

 

So these rx8 plugs are better than bur7eqp/bur9eqp?

 

this would help too to get an idea where the spark plugs stand.

http://mazdatrix.com/ign-2.htm