DUMB QUESTION. JUST GOT MY RX7 ABOUT A MONTH AGO. I AM CHANGING THE SPARK PLUGS AND AUTOZONE PARTS STORE ASKED IF I NEED THE TRAILING OR LEADING PLUGS? I WOULD ASSUME I NEED BOTH, BUT AM NOT SURE. I DID A SEARCH AND FIND ONLY INFO ABOUT RUNNING 7'S OR 9'S - LOSS SPARK ETC.

I OWN A 1988 MAZDA RX7 TURBO II 10TH ANNIV.EDITION

 

CAPS LOCK!!!

You will need both leading and trailing plugs BUR7EQ, and BUR9EQ. (2 of each..)Trailing plugs go in the top spark sockets, and leading go in the bottom. The NGK plugs will be marked L and T, and the Trailing will also have 2 blue lines on the ceramic.

 

Welcome to the club, you started off with one of the best models! Take care of your baby!!

 

Thank you maddox.
http://maddox.xmission.com

 

IF you feel inclined to do so, you can run 4 trailings in your TII.

Although the benefit isn't as much until you are modded and the colder plugs are needed.

 

ok, cool. I am having the cats removed tomorrow and running a straight pipe back to the y-pipe (dual mufflers) I also ordered a Bonex Under Drive Pulley as well. I pre-mix. Does the spark plug matter if premix?

 

ok, cool.I pre-mix. Does the spark plug matter if premix?

 

I dont think you should be using underdrive pulleys on a stree driven car. It will cause your alternator and water pump to slow down and might give you charging problems as well as cooling problems.

 

So teh 9's are the trailing plugs and the 7's are the leading plugs??

 

Yes.
Trailing=top
Leading=lower

Easy way to remember.

 

Are you sure they're NGK plugs, because the local AutoZone to me don't list NGK in inventory... just checking

 

Nipon Denso makes good plugs for 7's also .. Infact I have better luck with the Denso's, I am running a HI-6 CDI though.