whats the best spark plugs
Senior Member
Joined: Mar 2001
Posts: 255
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From: Springfield, Missouri USA
Originally posted by Pele
Wish NGK made lawnmower spark plugs...
Wish NGK made lawnmower spark plugs...
Heh
NGK R5671-A in various heat ranges here, in my NA 12A, 13BT, and YZ490 bike.
Senior Member
Joined: Mar 2001
Posts: 255
Likes: 0
From: Springfield, Missouri USA
Originally posted by mazdaspeedrex
Just got to put my $.02 in. NGK or Denso both work well. Just don't use Autolite or any other single ground electrode plug.
Just got to put my $.02 in. NGK or Denso both work well. Just don't use Autolite or any other single ground electrode plug.
Single ground NGK's are working great for me along with many other owners (many of which are running significantly more power than I am.)
DIRTY RX
Joined: Apr 2002
Posts: 395
Likes: 16
From: Omaha, NE
I wasn't aware that NGK made a single ground electrode plug for rotaries. Every single NGK and Denso plug I've seen listed for rotaries has been 4 electrode. That is also what they came with from the factory in Hiroshima. '79-'80 were Denso, '81-'85 were NGK. The 7's I've seen running single ground plugs seemed to burn through the plugs faster.
Joined: Dec 1999
Posts: 7,855
Likes: 517
From: Behind a workbench, repairing FC Electronics.
What plug does the FD run? I know on newer cars, Platinums and iridiums run better, but will they help on our older cars that burn more oil and have carbs and ****...
How do you judge the heat range you need? I just go with the BR8EQ-14's, but perhaps stock isn't the best...
How do you judge the heat range you need? I just go with the BR8EQ-14's, but perhaps stock isn't the best...
Senior Member
Joined: Mar 2001
Posts: 255
Likes: 0
From: Springfield, Missouri USA
Originally posted by mazdaspeedrex
I wasn't aware that NGK made a single ground electrode plug for rotaries. Every single NGK and Denso plug I've seen listed for rotaries has been 4 electrode. That is also what they came with from the factory in Hiroshima. '79-'80 were Denso, '81-'85 were NGK. The 7's I've seen running single ground plugs seemed to burn through the plugs faster.
I wasn't aware that NGK made a single ground electrode plug for rotaries. Every single NGK and Denso plug I've seen listed for rotaries has been 4 electrode. That is also what they came with from the factory in Hiroshima. '79-'80 were Denso, '81-'85 were NGK. The 7's I've seen running single ground plugs seemed to burn through the plugs faster.
EDIT: Lots of other threads with more good info than that. Search B9EGV and you'll find quite a few. Also: One of the plugs that has been commonly used for the side fire conversion is the longer reach version of the R5671-A. Lots of those in use in NA cars.
I can't see a reason to pay more than $2 a plug now that I've ran these. And...Since they're gappable, that can make all the difference in the world on a turbo car.
Correct heat range=no burned plugs.
Last edited by faster7; Apr 16, 2003 at 09:49 AM.
wankels like to be blown
Joined: Mar 2003
Posts: 230
Likes: 0
From: Miami Florida
ive used just about every plug.ngk is the best.the br8eq-14 is good all around,expecially with stck 12 a's.but if you are running 13 b carb, i found that the br9eq-14's are better.if you want somthing more for racing or even better street plugs.try the br9eq-14's platnum.those have been the best that i have used yet.sometimes the auto parts stores don't cary them.but most will order them.
Yeah, shutup kid.
Joined: Mar 2002
Posts: 1,686
Likes: 2
From: Columbus, OH
Originally posted by mazdaspeedrex
Denso Denso Denso Denso Denso Denso Denso Denso
Just got to put my $.02 in. NGK or Denso both work well. Just don't use Autolite or any other single ground electrode plug.
Denso Denso Denso Denso Denso Denso Denso Denso
Just got to put my $.02 in. NGK or Denso both work well. Just don't use Autolite or any other single ground electrode plug.
They work great for my car.
Rotary Enthusiast
Joined: Mar 2001
Posts: 1,353
Likes: 9
From: Sydney, Australia
depending on the motor setup depends on the plugs i use,
for a stock as a rock 12a i have used NGK b6es, for my turbo motor in low boost i have used NGK B7em these also work well on a stock 12a and 13b na, in my turbo motor when the boost is up i use NGK B9egv and br10.5egv on the C16 race fuel
only ever use NGK, the rest are far from the best!
Dale
for a stock as a rock 12a i have used NGK b6es, for my turbo motor in low boost i have used NGK B7em these also work well on a stock 12a and 13b na, in my turbo motor when the boost is up i use NGK B9egv and br10.5egv on the C16 race fuel
only ever use NGK, the rest are far from the best!
Dale
Full Member
Joined: Oct 2001
Posts: 136
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From: The South Bay and North OC
NGK ONLY! Had problems w/ the Denso's I tried so I don't use them. I don't see a problem w/ the single prong plugs. Their use is dictated by the motor modifications. Aren't the 2nd gen plugs considered "single" electrode?
Ride 'n Style
Joined: Dec 2002
Posts: 1,929
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From: Spokane, WA
Originally posted by slag
i had heard that running 2nd gen plugs (like ones from an 86 or so) would work great in our first gen cars.
True or false?
My car is slightly modded, no air pump, custom exhaust header, etc.
In fact, I am still trying to figure out what the previous owner did to this thing.
i had heard that running 2nd gen plugs (like ones from an 86 or so) would work great in our first gen cars.
True or false?
My car is slightly modded, no air pump, custom exhaust header, etc.
In fact, I am still trying to figure out what the previous owner did to this thing.
I have 2nd gen plugs in my car.... it's a13b 4 port, but... they work much better, but are much more expensive!!! They are a different plug. They do not have 4 prongs- they have almost a circle around the center electrode!!
Ride 'n Style
Joined: Dec 2002
Posts: 1,929
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From: Spokane, WA
Originally posted by Nut Job
so if im the cheapest racer ever.......what ones would i want to use? i dont want anything expensive i just want something that is good for upper rpm's what do you guys suggest?
so if im the cheapest racer ever.......what ones would i want to use? i dont want anything expensive i just want something that is good for upper rpm's what do you guys suggest?
1 set of autolites lasted 20,000KM in my TII.. they cost me like $9 for the whole set of 4, so what's the problem with them? I put in a set of NGK's and I can't tell the difference...
FD > FB > FC
Joined: Oct 2002
Posts: 3,873
Likes: 3
From: Bothell, WA
well I work for mazda, and all mazda's have allways come with NGK's with a few exceptions. 90% of ignition problems we get in are due to aftermarket spark plugs.
There was one year for the 626 where to avoid some terrifs, mazda used champion spark plugs instead of NGK's. And guess what, most of the cars had igniton problems that went away when they were changed to NGK plugs. NGK's are one of the best (if not the best) plugs out there.
There was one year for the 626 where to avoid some terrifs, mazda used champion spark plugs instead of NGK's. And guess what, most of the cars had igniton problems that went away when they were changed to NGK plugs. NGK's are one of the best (if not the best) plugs out there.
