RX7SpiritR

iTrader: (1)

What's best plug to put on FD? I've heard the copper ones are the best conductor, but don't last too long at all. Then theres platinum, but it wont conduct as well as copper but lasts much much longer. And I haven't heard much about iridium. Please tell me the company and type, personally I was looking at bosch platinum +4 for it. Not sure if they make em for the FD but I can check. Thanks for any posts.

RX7 RAGE

iTrader: (22)

Get the stock ngk platinums for the FD. They're the best to use. Use 9s all around if you are modded.

jkekeisen

What kind of price do you pay? THe cheapest I can find is 9.50 for platinum and 7.50 for regulars.

Jim

RX7 RAGE

iTrader: (22)

That price sounds about right.

BoostedRex

Can you still run 9' all around even if you are near stock?? I have intake, DP, CB just so you know exactly what I'm talking about.

Zach

YayeR

yes I will have same mods add a MP and ECU.. i have the same question

TomsRX7

I live in CA, literally around the corner from XS Engineering, and when they dyno tuned my car, they recommended HKS Irridium plugs.

spurvo

I'm running VERY stock (DP only!) and I ran all 9's for 500 miles or so. Pulled em and the leadings were pretty fouled. Put in the 7's and had more power, and after 500 miles, they look just right. Light mocha brown

Running the NGK's BTW. Not platinum...

RX7SpiritR

iTrader: (1)

No, haven't started it yet........well I drove it around the block today and it still running like ****, and it kind of makes sense that a plug is fouled or a wire is off, because it's only revving to like 4000 RPM's. I'm going to check connections and ignition coils and of course replace plugs just to be sure which is why I asked this question. Thanks for asking though and I'll let u know when I get it fixed and working again.

RX7SpiritR

iTrader: (1)

Hey spurvo, then I take it you're running 7 NGK coppers? Cause if you are then I will use 7's all around cause all I have is dp too. Just to make sure, u got 7 NGK coppers, let me know. Thanks.

striker

yeah dp and airbox here. i might try those 7 nkg. same question as above. are they the coppers?

nmo93

hey rx7spiritr,
check this site out, it's a comparison of different spark plugs. should help you out in your decision:
http://www.silverbulletrx7.com/plugs.html
nick

spurvo

Ooops! Meant to say 9's in the trailing, 7's in the leading, just like the manual says. I tried 9's all the way around, but the electrodes were fouled on the leadings after 500 miles or so because the leadings were too cold. So use the stock config for now. The all 9's trick is for heavier than 10 lbs boost high temp work, where they can help reduce the risk of lean burn detonation. In our stock set ups, we a) don't really need the protection as much, and b) really don't want the fouling that comes with all nines.

All 7's will run too hot. You run the risk of detonating if/when your car is up and running properly Good luck, man! You'll get it...

EviLPeNeviL

iTrader: (2)

I'm running all 9s right now and I have a catback...... Is that alright for my current setup?

spurvo

Drive 300 to 500 miles and pull the leading plugs (the easy ones!). If they're light brown, you're good to go. If they're black and/or sooty looking, put in a hotter plug.

toddp31

7's and 9's for stock or the winter. It all depends on what type of driving you do. If you are idling alot sitting in traffic go with 7's and 9's. If you are driving fast everwhere you can get away with running 9's or 10's. I am running a HKS Irridium all 10's. They do foul out, but they are worth it when you need the extra power. I will spend the extra cash,avoid detanation at all costs!!!

YayeR

ok so with a full exhaust, intake, radiator, and ecu should i run 9s or 10s ?