View Poll Results: Which plugs have you used?
NGK BR9EQ
31
47.69%
NGK BR8EQ
28
43.08%
Nippon-Denso 3104
5
7.69%
Champion 404
0
0%
Bosch Platinum+4 4478
1
1.54%
Bosch Super 7512
0
0%
AC Delco R43XLS
0
0%
AC Delco RapidFire 4
0
0%
Autolite 2526
2
3.08%
Other
5
7.69%
Multiple Choice Poll. Voters: 65. You may not vote on this poll
What type of spark plugs do you use?
12-29-02, 04:04 PM
#1
Rotary Freak
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What type of spark plugs do you use?
I called AutoZone and they have several spark plugs available for my 85 (12A). I'm used to using the NGK BR9EQs, but I'm willing to experiment. Have you used any of these plugs?
12-29-02, 04:43 PM
#4
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Originally posted by inittab
NGK all the way. I use BR9EQ-14's on the trailing and BR8EQ-14's on the leading.
NGK all the way. I use BR9EQ-14's on the trailing and BR8EQ-14's on the leading.
12-29-02, 06:58 PM
#6
Function > Form
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I cheaped out and bought some autolights ( I was eating rice 3 meals a day as it was, so give me a brake ) Long story short a few day's later I got NGK's. I think they're the best plug for 7's, all else I'll use bosch.
) Long story short a few day's later I got NGK's. I think they're the best plug for 7's, all else I'll use bosch.
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12-29-02, 07:20 PM
#9
MY NEW NAME IS ROTARY 7S
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NGK BR9EQ
I have used them for about 2 yrs...
Anything OTHER than NGK is just plain dumb..
Autolight is a cheap cop out,
Bosch 4 is the same as the NGK but I stil prefer the NGK
4 Prongs plugs
I have used them for about 2 yrs...
Anything OTHER than NGK is just plain dumb..
Autolight is a cheap cop out,
Bosch 4 is the same as the NGK but I stil prefer the NGK
4 Prongs plugs
12-29-02, 08:30 PM
#12
Don't look at the Autozone web site actually go to or call an Autozone. There is only one correct listing in the computer, the Denso 3104. The iridium is also listed but not available yet. The Denso is what I use and several other 7 owners use in this area and I've never had a problem with them. The other plugs that are listed on the web are incorrect. Bosch does not list a plug for the rotary, and the 4 ground design is different from NGK and Denso. The others are just single ground and are not designed for a rotary either. If the people at Autozone have any problems tell them to call me (Aaron)at store #1647, and I'll get them straigtened out.
12-29-02, 08:38 PM
#13
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Originally posted by mazdaspeedrex
Don't look at the Autozone web site actually go to or call an Autozone. There is only one correct listing in the computer, the Denso 3104. The iridium is also listed but not available yet. The Denso is what I use and several other 7 owners use in this area and I've never had a problem with them. The other plugs that are listed on the web are incorrect. Bosch does not list a plug for the rotary, and the 4 ground design is different from NGK and Denso. The others are just single ground and are not designed for a rotary either. If the people at Autozone have any problems tell them to call me (Aaron)at store #1647, and I'll get them straigtened out.
Don't look at the Autozone web site actually go to or call an Autozone. There is only one correct listing in the computer, the Denso 3104. The iridium is also listed but not available yet. The Denso is what I use and several other 7 owners use in this area and I've never had a problem with them. The other plugs that are listed on the web are incorrect. Bosch does not list a plug for the rotary, and the 4 ground design is different from NGK and Denso. The others are just single ground and are not designed for a rotary either. If the people at Autozone have any problems tell them to call me (Aaron)at store #1647, and I'll get them straigtened out.
12-29-02, 08:44 PM
#14
Autozone does not sell Autolite plugs and the other plugs you listed don't show up on my computer screen when I look them up in my Autozone store that I am the Manager of. I have seen them on the website listed that way, that is why I wrote that, As far as price The Denso's are $3.99 ea and the best I could find NGK's for was $4.99. There is your answer. BTW SA's came stock with Denso plugs. They can't be all that bad.
12-29-02, 09:00 PM
#15
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Originally posted by mazdaspeedrex
Autozone does not sell Autolite plugs and the other plugs you listed don't show up on my computer screen when I look them up in my Autozone store that I am the Manager of. I have seen them on the website listed that way, that is why I wrote that, As far as price The Denso's are $3.99 ea and the best I could find NGK's for was $4.99. There is your answer. BTW SA's came stock with Denso plugs. They can't be all that bad.
Autozone does not sell Autolite plugs and the other plugs you listed don't show up on my computer screen when I look them up in my Autozone store that I am the Manager of. I have seen them on the website listed that way, that is why I wrote that, As far as price The Denso's are $3.99 ea and the best I could find NGK's for was $4.99. There is your answer. BTW SA's came stock with Denso plugs. They can't be all that bad.
12-30-02, 08:11 AM
#20
I read your email
Originally posted by 85RX7GS
What's the advantage to doing that? Just curious...
What's the advantage to doing that? Just curious...
12-30-02, 08:34 AM
#21
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Originally posted by inittab
The trailing plugs, from what I understand, endure a lot more heat than the leading, that's why I run the colder "9" plug. You'll also notice that Mazda started recommending colder trailing plugs for all rotaries after 1986. <speculation> Perhaps this is because Mazda learned something about spark plug behavior and decided to make it a mfr recommendation. </speculation>
The trailing plugs, from what I understand, endure a lot more heat than the leading, that's why I run the colder "9" plug. You'll also notice that Mazda started recommending colder trailing plugs for all rotaries after 1986. <speculation> Perhaps this is because Mazda learned something about spark plug behavior and decided to make it a mfr recommendation. </speculation>
12-30-02, 08:42 AM
#22
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Originally posted by 85RX7GS
Cool. But aren't the hotter plugs prone to foul faster than the cooler plugs?
Cool. But aren't the hotter plugs prone to foul faster than the cooler plugs?
12-30-02, 06:32 PM
#25
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Well, whatever you do check the electrode depth. I've been told (tho it hasn't happened to me) that an unknowing mechanic put American plugs in a friends car that protruded into the swept area and chipped the end seals. Oh woe! Also, I think you want to use the 4 electrode jobs for reliability, and it's often hard to beat the mfrs original equipment. My original NGKs lasted many years. Finally I changed them just on General Principles.
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