Spark plugs
#1
Senior Newbie Member
Thread Starter
Spark plugs
I bought some BR8EQ14's from RockAuto for a stick port 12A but I'm reading conflicting things online , some one told me the trailing shoukd be different from leading. When i changed the plugs on my car two years ago I used BRE8's on all four.
#2
Rotary Enthusiast
I've never used anything but BR8EQ14s, in the 80's and now.
#3
Senior Newbie Member
Thread Starter
I figured. That's what I remember using and what I had read here but I went to napa and they said stock was BR7 and my friend said i needed BR9 leading and BR8 trailing but BR9 doesn't even seem to be made any more. Sigh..
#4
Rotary Enthusiast
My recollection of the difference between the BR7/8/9 is temperature range. If the current BR8's are light brown/grey and don't have carbon build up or aren't melted, then you are fine.
#5
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the 12A used the BR8EQ-14 all the way around. the GSL-SE used BR9EQ's which is a step colder. if you drive hard, its not a bad idea
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Frogman (09-09-23)
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#8
seniorchief
The owners manual for my 1985 13B does not recommend using the Hot Type BR7EQ14 on cars with the EGI systems. The standard plug is BR8EQ14 and the cold is the BR9EQ14, I used the cold plug for the thirteen years when I was in CA and FL because It was mostly highway driving at high speeds for me. I switched to the standard BR8EQ14 in 2007 when I moved to Indianapolis and have never experienced any fouling of either plug types when I was using them. There is a mention in the manual that if you are experiencing fouling of spark plugs due to excessive low speed operation like city driving they recommend switching to the hot BR7EQ14. Then again they don't recommend the hot plug for EGI equipped cars either.
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Frogman (09-07-23)
#9
Spark plug
Last edited by LoneStar23; 09-10-23 at 12:35 PM.
#10
seniorchief
Look good to me, a "coffee" brown burn look on a spark plug is considered to represent a "good" air/fuel mixture was what I was taught.
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LoneStar23 (09-10-23)
#12
Junior Member
Original plugs for my 79 RX7
New old guy here, I bought the first RX7 in my town in 1979, and as such the dealer was my only source of plugs for a while. Here's what they were. Long story short I ended up with the dealer supply after he went belly up.
#14
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Frogman (09-17-23)
#18
I actually own Rotaries
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I have some of these NOS also if anyone is interested.... shoot me a PM
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