mazdaspeed7

And just how many of those "issues" do you think have been previously addressed and deemed to not be a problem, or even an issue? Sometimes the reason noone asks the question is because the it has been asked and answered before by the very people you think are afraid to ask it.



Spark plugs have been around a very long time, and generally follow the same design. Gimmicks come quickly, and fade just as quickly when people realize that its not a technological advancement, its just a profit oriented gimmick. They come and go so quick its easy to miss them. Do you seriously think spark plugs with a built in capacitor are a new invention? Try this one. Modern ignitions are capacitive discharge. The capacitors that store energy until it peaks and discharges are stored in the ecu, and fire the coils directly.



Second, did you ever stop to think about just how many engineers OEM's employ to design their engines? Do you seriously think that spark plugs dont get their fair share of attention? How about the proprietary spark plugs in the current f150 engines(and possibly fords whole modular v8 line)? Or the surface gap plugs mazda uses on the rotary?

ColinRX7

Seppuku, pass the popcorn man.

defprun

Seriously if there were a specific type of plug for the RX7 than every generation wouldnt use the next "gimmicky" plug out there. I believe RX-8s use iridium...so what if the next RX7 uses a pulstar like plug??? It's all about ignitibility and theres no denying RX7's gain HP with a better ignition system.

iamsisyphus

Are you the guy that didn't ask because you asked and answered it before? Have ever used these things? If not, you don't know. I'm just asking if anyone had any experience, not whether you approved.



Pursuing your logic (and ignoring the obvious factual inaccuracies) the Wright Brothers should ntot have bothered because Leonardo had tried flight and anything anyone claimed to be new technology would be mere gimmickry and not worth experimenting with. I do believe that the OEM engineers did the best they could with the available technology. But remember, at the time they were designing this car mainframe computers were the rage and the new fangled PC was just a gimmick. Memory took up too much space for them to be practical. Every RX7 forum I've been on is dedicated to what the aftermarket engineers can do from body panels to suspension to engine management. According to your logic, nobody should ever bother with anything other than cosmetic aftermarket items because they are mere gimmicks. Don't you think the OEM guys did their best with the engine management system. Check out the guys discussing that stuff. Theorize in one hand, spit in the other. Let'sput the question to a practical test.



Now with respect to my question, its plain that no-one has any experience, therefore, no-one can give anything more than theoretical speculation to offer. If anyone should have any experience before I get around to it, please let me know. Thanks



Sisyphus

fc3s4utnv

OMFG! Dont mess with the plugs, if they worked for a rotary they would be offered, besides I always want just a normal run of the mill plug, if you use a platinum or whatever they will burn up the engine before the plug burns up!





Can I get some of that popcorn? Who the hell has the cherry coke too?

1988RedT2

For those unfamiliar with the Greek myth, Sisyphus was damned by the gods to eternally push a huge stone to the top of a mountain, only to have it roll back to the bottom where he would be forced to do it all over again. Not unlike searching for a better spark plug for the rotary engine.



Problem with the aftermarket is that new products are more driven by marketing types than by engineers. For every worthwhile product that becomes available, there are ten that are utterly useless, IMO.

Maxt

I personally wouldnt use those plugs in a rotary, and I don't care what Racing beat says, they have been around a long time, but they are not an authority on spark plugs.

One day I was super bored when I couldnt sleep and I ended up reading a bunch of articles on plugs from the NGK main website. Specifically about plug interchange and cross referencing when it comes to numbering, the article said that even though 2 plugs might have the same heat rating, the heat rating is derived from testing in the engine the plugged was originally designed for, and the heat dissipation of a plug is more than what they called the "thermicity" of a plug, but a combination of the plugs construction and the engines construction. So the true heat rating of plug would differ in a iron water cooled, from a aluminium air cooled engine. Meaning a recip motorcycle 10 is not the same as a rotary car 10, its relative to starting point on certain engine. Also the insulator is designed to with stand the standard thermal load of a certain engine. They warn against simply using plugs based on thread, size and number, its asking for trouble.

If you want colder plugs, NGK makes the Racing series which are rotary specific, yes they are 35 bucks a plug, but a rotor and housing is a lot more. I've taken a part a 12a that someone used cross referenced autolites in, and it wasn't a pretty sight after the insulator went through the motor. The racing plugs also last forever even with a CDI, so you would probably go through 5 sets of motorcycle plugs before one set or R series plugs anyway.

sen2two

i have used B9es fron NGK on all of my rx7s from time to time. so have a few friends. they help when your car has a flooding problem. they'll run in a pool of gas. and they are crazy cheap. i think they are jet ski spark plugs i think...



they are not flat top.



i skimmed over most of this thread, dont know for sure if this was covered...

defprun

I'm gonna try these plugs next, no harm no FOUL...harr.