Ever seen these plugs before?
12-08-03 | 05:16 PM
#1
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Alcohol Fueled!
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From: Hood River oregon
Ever seen these plugs before?
I heard that these are the plugs that came stock with the FC from the factory. Anyone know anything else about them? I have 2 sets leading and trailing, brand new in the box.
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12-08-03 | 06:32 PM
#10
Haven't we ALL heard this
Joined: Mar 2001
Posts: 3,948
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From: Indiana
http://www.wankel.net/rx7-fb-1999/msg03375.html
Last paragraph
Coil voltage was again raised in 1986 models. Gap jumped to .080" with
the first Mazda specified surface gap plugs, SD10A and SD11A. These
proved less than ideal for long term reliability. Other variations were
tried until Mazda and NGK settled on the currently recommended BUR type
pseudo surface gap plugs. Visit http://www.mazdatrix.com/ign-2.htm for
more.
Last paragraph
Coil voltage was again raised in 1986 models. Gap jumped to .080" with
the first Mazda specified surface gap plugs, SD10A and SD11A. These
proved less than ideal for long term reliability. Other variations were
tried until Mazda and NGK settled on the currently recommended BUR type
pseudo surface gap plugs. Visit http://www.mazdatrix.com/ign-2.htm for
more.
12-08-03 | 06:33 PM
#11
Haven't we ALL heard this
Joined: Mar 2001
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From: Indiana
Found this too
http://home.iprimus.com.au/bradr/engine.htm
Plugs and Leads - Get some new plugs and leads, don't use the ones that come with the engine just so you know they work...The standard plugs used in the turbo engine are NGK SD10A and SD11A they are bloody expensive about AUS$30 each, and from my experience don't work very well and they foul really easily, too cold maybe. Mazda stopped using them because the ceramic around the electrode cracked and fell apart into the combustion chamber, so not good, don't use them
http://home.iprimus.com.au/bradr/engine.htm
Plugs and Leads - Get some new plugs and leads, don't use the ones that come with the engine just so you know they work...The standard plugs used in the turbo engine are NGK SD10A and SD11A they are bloody expensive about AUS$30 each, and from my experience don't work very well and they foul really easily, too cold maybe. Mazda stopped using them because the ceramic around the electrode cracked and fell apart into the combustion chamber, so not good, don't use them
12-08-03 | 06:37 PM
#14
They were original equipment in my '88TII. Mazda (NGK) had a problem with the trailing plugs firing in the early designs. Mine would last maybe 200/300 miles and they would cease firing. They even got a set of the '89/'91 plugs (7&9) and had them shipped over here for me to try way before the '89's hit the market. They didn't work either, so Mazda bought the car back and that's how I got my '89TII with the redesigned houisings.
12-08-03 | 06:37 PM
#15
What R U thinking self?
Joined: Mar 2002
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From: Stockton, CA
Originally posted by J-Rat
Got them on an EBAY bid a while ago. Always wondered if they were worth anything.
Got them on an EBAY bid a while ago. Always wondered if they were worth anything.
12-08-03 | 06:41 PM
#16
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Alcohol Fueled!
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From: Hood River oregon
Pretty much yea, they werent very expensive, and they make a nice display item. I had no intention of installing them, they were more of a "gee whiz" impulse buy. I have found out that they are the original plugs, discontinued a while ago. No longer available. Probably not worth a whole lot.
12-08-03 | 07:10 PM
#19
Haven't we ALL heard this
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From: Indiana
Originally posted by Turbonut
They were original equipment in my '88TII. Mazda (NGK) had a problem with the trailing plugs firing in the early designs. Mine would last maybe 200/300 miles and they would cease firing. They even got a set of the '89/'91 plugs (7&9) and had them shipped over here for me to try way before the '89's hit the market. They didn't work either, so Mazda bought the car back and that's how I got my '89TII with the redesigned houisings.
They were original equipment in my '88TII. Mazda (NGK) had a problem with the trailing plugs firing in the early designs. Mine would last maybe 200/300 miles and they would cease firing. They even got a set of the '89/'91 plugs (7&9) and had them shipped over here for me to try way before the '89's hit the market. They didn't work either, so Mazda bought the car back and that's how I got my '89TII with the redesigned houisings.
James
12-11-03 | 04:06 PM
#22
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Alcohol Fueled!
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From: Hood River oregon
FWIW, I doubt you can purchase the exact same plugs I have. Many places list the SD11A and the SD10A, but the part numbers just cross to the BUR9EQs and BUR7EQs.
Jarrett
Jarrett
12-11-03 | 08:20 PM
#24
Former Moderator. RIP Icemark.
Joined: Apr 2001
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From: Rohnert Park CA
Originally posted by J-Rat
Ask, and ye shall recieve.
Ask, and ye shall recieve.
The only thing that suggests that they are for the FC is the N333/ N334 number
Last edited by Icemark; 12-11-03 at 08:23 PM.
12-12-03 | 04:14 PM
#25
Eat, sleep, work, mod.
Joined: Jun 2001
Posts: 2,517
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From: Long Island
They look like Densos...I got Densos last year sine my supplier was out of stock on NGK's for the 13B at the time I was doing my annual tune up...Denso's worked just fine, still have 'em in 
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