Best spark plugs set up for Rx7 JDM RHD?
 

Hi, All

Here I'm again with a new doubt... I'm gonna change spark plugs.. and i don't know what kind of Spar plugs should i get... I found 2 set ups

2 x NGKBUR9EQ + 2 x NGKBUR7EQP and don't if there is any diff. for having that last "P"

and 4 x NGKBUR9EQP : with that "P"

2 different set ups and I don't understand why... just i don't wanna make wrong choices...

please help me!

P.S My car is stock, highway/city mix driven.... I've Greddy airinx intake, and a catback.... stock ecu...

The plugs you have listed BUR9EQ/BUR7EQ are copper plugs & the BUR9EQP/BUR7EQP are platinum plugs. The platinum plugs will be more expensive & said to last longer.

oh! thx! but what set up will be the best for me? or wich one is correct... im very confused...

There is no real difference that I know of other then the one being platinum & the other not. The standard plugs will be fine, but if you want to spend the extra money on the platinum then go ahead. Nothing to be confused about, there are other plug combos out there with various heat ranges & adjustable gaps. The BUR9's/BUR7's are the suggested plug.

The 7 and 9 correspond to the heat range. 6/7 = Hot, 8/9 = Cold

From Mazdatrix:
The norm is 6/8 or 7/9. http://mazdatrix.com/ign-2.htm has a little chart for you.

Assuming your car is stock or near stock on the stock ECU, get the standard plugs in the stock heat ranges. No need to spend for the platinum...in my experience they never lasted any longer.
And having a RHD would make no difference. In this case the engine doesn't care if it's on the odd side for North America.

Thx for your repplies... i was confused.. because searching i found many people suggesting 4 x 9 BUR9EQ in all holes and saying that redlining the car sometimes will help with fouling...

oh! and also some people say that 1 set up or another affects the mpg... is that true? i just want to run safe... =)

All four 9's are suggested once significant power modifications have been added or running higher than stock boost. It reduces the chance of pre-ignition. Running colder plugs while still relatively stock just allows them to foul quicker.

Red-lining a car JUST to clean plugs is dumb IMO. It's all too frequently used as a rationale for driving like an ass-hat. Driving hard is fun, I understand. But taking a car to red-line stresses alot of things that tend to off-set what little benefit that might provide. Buy decent gas, change your oil frequently and if your worried about carbon build-up, add a simple AI system.

Maybe there's something, but I'm not aware of any reliable data reflecting a significant change in mpg related to a plugs heat-range on our cars.

Jonathan - What modifications have been done to your car so far? Knowing what has been done to it and how you're normally using your car would help us help you.

I agree with that has been said though, if you're just running near stock configuration for mostly street driving than the stock 7's and 9's should work perfectly fine for you =)

hi, my car came with catback, Greddy airinx intake... and nothing else... so I've a stock ecu... is an 95 R2 car.. red line is at 7.5K

I've mentioned that is RHD... because seems like there is a small differences btwn Usdm and Jdm... for example my car doesn't have the precat... comes with a stock downpipe with heatshields, etc...

My driving... mixed.. I'd say 70% highway /30% city and some street drag at weekend...

just I wanna run in the safest way possible... and as you're the experts... there is no better place to ask...

Every plug will foul.

cheap shit ain't good, good shit ain't cheap.

50% of SOMETHING is better than 100% of NOTHING.

Peace of mind > pieces of a car

I have no idea what kind of zen message DriFD3S just tried to convey.... but, 65% of statistics are made up on the spot!


Jonathan - you'll be fine running the standard iridium 7's and 9's. No need to get fancy with your current mods and power levels.

If your car was LHD it would be VERY rare. But not so much as it is.
If you want to run in the safest way possible, don't street race. It isn't safe, legal or cool. Take it to a track.

:iagree:

Just trying to be an active poster on RCC,
however, based on my own personal experience
(despite whatever doubts all of you may, or should have)
I will break it down for you less aware people...

#1Every plug will foul.
#2cheap shit ain't good, good shit ain't cheap.
#350% of SOMETHING is better than 100% of NOTHING.
#4Peace of mind > pieces of a car

#1) All that shines, turns to rust. Every plug will eventually require replacement,
And need to be re-evaluated.
#2) (tattoo quote) Cheap stuff isn't good, and good stuff isn't cheap, If you get a bad tattoo, it'll be there forever weather you like it or not.
#3) (F&F3:Tokyo Drift) What would anyone rather have?
#4) Having peace of mind is better than having a bunch of pieces of a car.
If you know it works, than do it, if it is not effective, do more homework...

/endzen

Again... you're not making a clear point DriFD3S. Stop quoting Fast and the Furious and tattoo magazines and put down the pipe =P

Bottom line is that the OP will be just fine using the stock plugs. With his current setup he's really not going to see any significant gains by upgrading to more expensive ones, if anything he may see a REDUCTION on performance due to fouling and difficulty operating at lower temperatures. (Edit: I'll break it down for you, since you seem a bit less aware - I spend a little over $30 for my plugs, PER PLUG! I use them because my engine build and power levels benefit from the stronger plugs. If I were spending $130 on plugs with a mostly stock car it would be a stupid, stupid, waste of money and the plugs would foul almost instantly and be less than useless. At stock levels you're only going to need the basic plugs that run you about $15 for all four.)

Perhaps you should do more homework before throwing arbitrary quotes and sayings out there simply for a post count.