New NGK BUR7EQ / BUR9EQ Spark Plugs

[Rotary13B1]

BUR7EQ Spark Plug



BUR9EQ Spark Plug




These just came in, on the shelf.

[FC Zach]

Correct, I called advance auto today and they had to cross the BUR7EQ to 6917.

[RICE RACING]

These plugs are rubbish, I do not know why people use them in anything performance related.

[GySgtFrank]

Originally Posted by RICE RACING

These plugs are rubbish, I do not know why people use them in anything performance related.

So which plugs are you using Peter? Just calling them rubbish without an explanation of why you believe them so, and no alternative selection, leaves us just a little short on useable information.

[RICE RACING]

Originally Posted by GySgtFrank

So which plugs are you using Peter? Just calling them rubbish without an explanation of why you believe them so, and no alternative selection, leaves us just a little short on useable information.

I have well over 1000 of these plugs taken out from every Mazda I recalibrate and set up (most are brand new lol), they are very prone to misfire (non audible) and always show less power and efficiency as a result of these non audible misfires. 300bhp level onwards I never ever use these nor recommend them.

The NGK R7420 is the ideal spark plug (I pioneered the use of these in Greddy Trust brand 10 years ago, now everyone simply regurgitates that recommendation on other homo pay to play sites). It matches these for durability has no misfires, can be gaped to run high output, make more power, use less fuel, can be selected in the correct heat range.

[calicrewchief]

$40 a piece is pretty steep for spark plugs. Rice, you would probably know more than anyone else, but are there ways of maintaining spark plugs to extend their life range? I don't know if it's a stupid question or not. I have seen old spark plugs refurbishers. If a plug is fouled, is it completely junk?

[RICE RACING]

Originally Posted by calicrewchief

$40 a piece is pretty steep for spark plugs. Rice, you would probably know more than anyone else, but are there ways of maintaining spark plugs to extend their life range? I don't know if it's a stupid question or not. I have seen old spark plugs refurbishers. If a plug is fouled, is it completely junk?

I know more about plugs than I care to remember but I will say this, rotaries in particular have a few modes of fouling, some are not as obvious as others and the one that cannot be rectified ever is when the plug gets wet for an extended period, you can heat it up with a gas torch and sand blast it and do what ever you like but that plug will be fucked and technically fouled for life, it is then a bin job.

If the plug is only carbon fouled then not a problem, sand blasting in a proper plug cleaner and re gaping to specification will bring it to almost new condition.

The ghetto base alloy plug ground straps fatigue over time and these need to be binned before the used by date, I have seen these get bent onto the center electrode from combustion pressure in high HP turbo 2 rotors.

Best thing you can do to extend plug life is (any one or all of these things) water injection, right AFR mix at idle and cruise! (90+% of running conditions), CDI ignition system to prevent wet fouling (and throwing away $200 set of plugs!) have an engine that has compression! lol! this is common in aftermarket steel sealed shit boxes that have low compression ! and this means less heat on the plug at idle and cruise and forever problems with low plug life as a result of a lack of heat to burn off the fuel and carbon deposits (self cleaning). Less compression you have the more plug problems you have RE fouling.

Set the car up right, run the right parts and plugs will never be a problem again.............. I laugh very hard when I see cars that need "warm up plugs!" good set ups run 11 heat range from freezing to track and in daily applications not a problem.

I run R7420 in 11 heat range all round in mine, they work great, but dont try to run these with a HKS DLI or inductive lol, or a shit "tune" they will be a throw away item in a week of daily driving, hence my paragraphs above of a complete correct well developed set up.

[RETed]

Really RR...are you okay down there?

I made this thread for information that NGK redid the spark plugs.
I'm not arguing for what application.
Mazda recommends them for STOCK applications.
I'll put money these plugs outsell every other spark plug out there for 13B rotary engine applications, period.
You gonna argue you know better than Mazda R&D for stock applications?

You come in here and shit in this thread with your rants.
I really don't give a fuck if you figured this out before Trust / GReddy.
You wanna talk about high boost / high power applications?
Go start your own godamn thread.
Keep the crap out of this thread and keep the shit on-topic.


-Ted

[RICE RACING]

Originally Posted by RETed

Really RR...are you okay down there?

I made this thread for information that NGK redid the spark plugs.
I'm not arguing for what application.
Mazda recommends them for STOCK applications.
I'll put money these plugs outsell every other spark plug out there for 13B rotary engine applications, period.
You gonna argue you know better than Mazda R&D for stock applications?

You come in here and shit in this thread with your rants.
I really don't give a fuck if you figured this out before Trust / GReddy.
You wanna talk about high boost / high power applications?
Go start your own godamn thread.
Keep the crap out of this thread and keep the shit on-topic.


-Ted

Even stock with a pod filter and exhaust these plugs are shit compared to a single fine electrode plug

That is a service to people who otherwise would not know any better, like I said I have no idea why people use these spark plugs.

No need to carry on like a tool

Don't believe me? try a few hundred sets and post back your findings you will find if you do, I am right in what I say

p.s. even B9EGV's are better than these plugs listed, and dirt cheap, I have and had customers running these in stock FD's for 30,000km and gone back and tuned 2 years later and these plugs are fine, no misfires like these stock FD plugs, better economy, and more power............ advice is free, feel free to use it. If you want some of these shit plugs cheap I'll sell you some, I literally have hundreds of them lol.

[RICE RACING]

And yes if there is no spark plug thread and if I have time I'll contribute to one if you want me to do so. You can take my posts out of this thread too.

I was just SHOCKED to see people using these plugs! I don't know anyone who wastes there time with these in any application stock or otherwise. Thus my post/s.

[RICE RACING]

The argument of Mazda R&D is total bullshit@!
If it was good then you would tune your own car to 10.0:1 AFR at 200bhp level LOL! like they do? have you ever tested a bone stock FD3S, I have I list the data which no one else does!................ Just cause it came from a mass produced factory does not mean its right or the correct, that argument is spurious at best.

Done believe me go instrument a car and change out these rubbish plugs for a set of B9EGV's and post back. You will find it will use less fuel, make more power, be less sensitive to over rich (OEM is best tuning) ....... I could go on and on.

I did all of this testing in the mid 90's a long time ago, like I said I forgot just how bad these stock plugs are, have not used them in a very long time and every time I change them out and do nothing else (don't tell the customer) they all give feedback on how much better the car is, that is not placebo either as most are very anal and know their cars intimately and if there was any negative I am sure they would tell me about it

Try it Ted, if I am wrong then I am happy to be told so, by you or Mazda, but I am not and never am.

[730RWHP12A]

anybody use the NGK R5671A-10 plugs? i have used them with good results.. they are inexpensive too..

[Rotary Evolution]

i have not noticed any change in the plugs, some new ones are boxed in a silver package but they look the same physically compared to the old yellow boxed versions.

i use R6725-105 leading/BUR9EQ trailings for anything over 350whp. the BUR9EQs are fine for anything below that. yes i also realize this goes against the thought process that the trailing plug should be colder than the leading, but of course with anything testing told me that it was a waste paying $50 for upgraded trailing plugs, same goes for ignition amps to bump up trailing output. trailing ignition is just a placebo, as long as it is firing consistently it will still bring in the numbers.