What spark plug gap?

Reply Subscribe

Thread Tools

Search this Thread

Nov 9, 2009 | 07:31 AM

#21

Doppelgänger

Elite Member

iTrader: (12)

Joined: Sep 2007

Posts: 6,850

Total Cats: 71

From: Charlotte, NC

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

Nov 9, 2009 | 10:20 AM

#22

triple88a

Thread Starter

Elite Member

iTrader: (2)

Joined: Apr 2006

Posts: 10,522

Total Cats: 1,830

From: Chicago, IL

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

Dec 1, 2009 | 12:48 AM

#23

NAshowdown95

Guest

iTrader: (-2)

Joined: Nov 2006

Posts: 144

Total Cats: 0

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?

Dec 1, 2009 | 08:44 AM

#24

therieldeal

Senior Member

iTrader: (2)

Joined: Oct 2007

Posts: 547

Total Cats: 2

From: Northeastern CT

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

Dec 1, 2009 | 07:23 PM

#25

NAshowdown95

Guest

iTrader: (-2)

Joined: Nov 2006

Posts: 144

Total Cats: 0

lucky

lol very impressive car man!

anyone else running BKR7E?

Dec 1, 2009 | 07:24 PM

#26

18psi

VladiTuned

iTrader: (76)

Joined: Apr 2008

Posts: 35,821

Total Cats: 3,482

Yes. Many people.

Dec 1, 2009 | 07:32 PM

#27

triple88a

Thread Starter

Elite Member

iTrader: (2)

Joined: Apr 2006

Posts: 10,522

Total Cats: 1,830

From: Chicago, IL

Quote:

Originally Posted by NAshowdown95

anyone else running BKR7E?

thats the standard plug recommended for turbo miatas

Dec 1, 2009 | 08:08 PM

#28

NAshowdown95

Guest

iTrader: (-2)

Joined: Nov 2006

Posts: 144

Total Cats: 0

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

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

Dec 1, 2009 | 08:42 PM

#29

18psi

VladiTuned

iTrader: (76)

Joined: Apr 2008

Posts: 35,821

Total Cats: 3,482

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

Dec 1, 2009 | 11:01 PM

#30

MartinezA92

Elite Member

iTrader: (4)

Joined: Aug 2009

Posts: 1,784

Total Cats: 42

From: Redwood City, CA

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

Dec 1, 2009 | 11:07 PM

#31

18psi

VladiTuned

iTrader: (76)

Joined: Apr 2008

Posts: 35,821

Total Cats: 3,482

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

Dec 1, 2009 | 11:09 PM

#32

triple88a

Thread Starter

Elite Member

iTrader: (2)

Joined: Apr 2006

Posts: 10,522

Total Cats: 1,830

From: Chicago, IL

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.

Dec 1, 2009 | 11:49 PM

#33

ScottFW

Senior Member

iTrader: (4)

Joined: Jan 2008

Posts: 1,361

Total Cats: 17

From: Falls Church, VA

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.

Dec 2, 2009 | 12:29 AM

#34

MartinezA92

Elite Member

iTrader: (4)

Joined: Aug 2009

Posts: 1,784

Total Cats: 42

From: Redwood City, CA

Quote:

Originally Posted by ScottFW

0.03937 to be exact.

The OCD in me had to say something.

Dec 2, 2009 | 01:12 AM

#35

cjernigan

Elite Member

iTrader: (13)

Joined: Oct 2006

Posts: 8,091

Total Cats: 7

From: Atlanta, GA

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

Dec 11, 2009 | 09:56 AM

#36

simonetrb

Junior Member

Joined: May 2006

Posts: 47

Total Cats: 0

From: ITALY - SAN BENEDETTO DEL TRONTO

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??

Dec 11, 2009 | 10:01 AM

#37

Braineack

Boost Czar

iTrader: (62)

Joined: May 2005

Posts: 80,541

Total Cats: 4,364

From: Chantilly, VA

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

Dec 13, 2009 | 12:52 AM

#38

lycos

Newb

Joined: Sep 2008

Posts: 11

Total Cats: 0

From: Charlotte NC

lol

Dec 13, 2009 | 08:51 AM

#39

simonetrb

Junior Member

Joined: May 2006

Posts: 47

Total Cats: 0

From: ITALY - SAN BENEDETTO DEL TRONTO

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!!