What spark plug gap?

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11-09-2009, 07:31 AM

#21

Doppelgänger

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I've been able to run .035"-.037" on the stock 01+ coils + Magnacore wires + NGK race plugs.

11-09-2009, 10:20 AM

#22

triple88a

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Yeah i measured the stockers and they were about 37-38
i made the new ones 33

12-01-2009, 12:48 AM

#23

NAshowdown95

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Recommended spark plugs/gap for 95 on 7psi, stock coils?

Was assuming to go with BKR7E's but unsure of a correct gap...

Guess there really is no definitive FAQ on proper spark plug choice and gap?

12-01-2009, 08:44 AM

#24

therieldeal

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i'm running ~0.032 on BKR7E but thats with a blaster II coil and a distributor... its a little easier for me to upgrade than you guys

12-01-2009, 07:23 PM

#25

NAshowdown95

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lucky

lol very impressive car man!

anyone else running BKR7E?

12-01-2009, 07:24 PM

#26

18psi

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Yes. Many people.

12-01-2009, 07:32 PM

#27

triple88a

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Quote:

Originally Posted by NAshowdown95

anyone else running BKR7E?

thats the standard plug recommended for turbo miatas

12-01-2009, 08:08 PM

#28

NAshowdown95

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18psi,triple88a...thanks for the info guys.

Whats the recommended/common gap on those plugs on stock 1.8 coils?

12-01-2009, 08:42 PM

#29

18psi

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.035-.030 is what mine are set to.

12-01-2009, 11:01 PM

#30

MartinezA92

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Whats stock plug gap anyway? Just for an N/A engine? (Not COPs)

12-01-2009, 11:07 PM

#31

18psi

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I think its somewhere in the high 40's low 50's? Just guessing

12-01-2009, 11:09 PM

#32

triple88a

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Quote:

Originally Posted by 18psi

I think its somewhere in the high 40's low 50's? Just guessing

Lol he did say NOT cops

from what i've found 35-40 is good.

12-01-2009, 11:49 PM

#33

ScottFW

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Mazda specs the stock gap at 1mm because, that's right, they've got the metric system! If you do the math it's pretty close to .040" which is a nice easy number to remember.

Being still N/A I haven't felt compelled to run BKR7Es but I do run BKR6Es (one heat range colder than the stock BKR5E) because it hits the track a few times a year. On a totally stock street only car I don't see any need to run colder than stock plugs.

12-02-2009, 12:29 AM

#34

MartinezA92

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Quote:

Originally Posted by ScottFW

0.03937 to be exact.

The OCD in me had to say something.

12-02-2009, 01:12 AM

#35

cjernigan

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I ran .025 with the wrong spark resistor in my MS with stock '99 coils.

12-11-2009, 09:56 AM

#36

simonetrb

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I just turbo'ed my car, with an HKS kit w/o intercooler boosted at 5,8 psi:

I bought NGK BKR7EIX-11 where 11 stands for the 0,043" gap...

It is the standard gap of the NA version, could it be too much?

I tried to boost @ 6,5 psi and i heard it knock, could it be because of the plugs' gap?

what if the gap is too much??

12-11-2009, 10:01 AM

#37

Braineack

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then you'll have spark blow out issues, and no spark = no boom = no detonation.

12-13-2009, 12:52 AM

#38

lycos

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lol

12-13-2009, 08:51 AM

#39

simonetrb

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Quote:

Originally Posted by Braineack

then you'll have spark blow out issues, and no spark = no boom = no detonation.

i didn't really understood what you meant...

anyway I put the gap at 0,035"...

It went good...

I tried the car on the motorway and reached 6500 rpm in 6th gear at 225 kmh...

It seems it is good!!