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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 09-19-2008, 12:26 PM   #1
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NGK Plugs

What is the difference between the NGK-BCPR7ES and the NGK-BCPR7ES-11?


Pete ordered plugs from Eeuro and the NGK-BCPR7ES are what they shipped him.
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Old 09-19-2008, 12:34 PM   #2
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The -11 are pre-gapped.
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Old 09-19-2008, 01:15 PM   #3
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Yep, that's what the dealer sold me the other day.

They work just fine.
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Old 09-19-2008, 01:22 PM   #4
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haha, sweet. thats good to know, thanks aaron for askin the question.
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Old 09-19-2008, 02:15 PM   #5
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god damn sig nazis.... lol.
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Old 09-19-2008, 03:48 PM   #6
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mhm i changed mine for new nkg's and now i'm getting like 18mpg in my vig around the town. it must be my driving though.
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Old 09-19-2008, 04:09 PM   #7
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god damn sig nazis.... lol.
The rules are clearly posted. Don't like them? OK, leave.
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Old 09-19-2008, 04:17 PM   #8
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This is a typical spark-plug code: BCPR6ES-11

The feild breakdown is like this.
Feild 1 - 'B'
Feild 2 - 'CPR'
Feild 3 - '6'
Feild 4 - 'E'
Feild 5 - 'S'
Feild 6 - '11'

Feild 1: Thread diameter;
A=18mm
B=14mm
C=10mm
D=12mm

Feild 2: Construction;
C=hex size 5/8
K=hex size 5/8 with projected tip (ISO)
M=compact size
P=protected insulator
R=resistor
SD=surfacedischarge for rotary engines
U=semi-surface discharge
Z=inductive suppressor

Feild 3: Heat Range;
2=Hot ~ 10=cold

Feild 4: Thread reach;
E=19mm
F=tapered
H=12.7mm(1.5")
L=11.2mm(7/16")

Feild 5: Firing end;
A,B=Special design
C=Special ground electode
G=racing
GV=racing use V type
H=half thread
K=2 ground electrodes
L=half heat range
LM=lawn mower
M=2 ground electodes for rotary
N= Special ground electrode
P=platinum tip
Q=4 ground electrodes
R=delta ground electode
S=standard 2.6mm ceter electrode
T=3 ground electrode
V=fine wire centre electrode gold palladium
VX=platinum tip (high performance)
w=tungsten electrode
X=booster gap
Y=V-groove center electrode

Feild 6 Numbers after the dash;
8=0.8mm plug gap
9=0.9mm gap
10=1.0mm gap
11=1.1mm gap
THERE IS NO 12..
13=1.3mm gap
14=1.4mm gap
15=1.5mm gap
20=2.0mm gap
Also:
http://www.skylinesaustralia.com/for...post&id=173274
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Old 09-19-2008, 04:45 PM   #9
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i'm not sure that anyone stocks anything other than the 11's, but you should probably gap them anyways.
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Old 09-19-2008, 04:47 PM   #10
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I've gotten plain old PCV7ES many-a-time.

In fact I have even gotten BP7ES before over the counter, no special order (plug for an 8 valve c900)
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Old 09-19-2008, 04:50 PM   #11
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I mean in terms of the BCPR7ES.
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Old 09-20-2008, 10:09 AM   #12
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mhm i changed mine for new nkg's and now i'm getting like 18mpg in my vig around the town. it must be my driving though.
Which ones did you use? The recommended plug for the viggen is NOT the BCPR7ES. They will work but the recommended plug is the PFR7H10

http://www.eeuroparts.com/Main/PartD...spx?id=PFR7H10

Why people put the cheaper plug in is beyond me. Why buy the most expensive top of the line performance model (viggen) and cheap out on the plugs?
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Old 09-20-2008, 10:10 AM   #13
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The BCPR7ES has a colder range I think

EDIT

Compared to the PFR or whatever
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Old 09-20-2008, 01:00 PM   #14
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okay, someone fill in my ignorance...is there any particular reason why us saabers are "stuck" on ngk? Is there anything special about them that makes the other brands "not applicable"? I ran Denso's in my old prelude and they ran great. and what of these pulse-star plugs i'm seeing pop up in magazines? I've seen at least two before and after dynos and they look pretty convincing...or is just another turbonator? Some break down the science for me, please....
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Old 09-20-2008, 01:05 PM   #15
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Which ones did you use? The recommended plug for the viggen is NOT the BCPR7ES. They will work but the recommended plug is the PFR7H10

http://www.eeuroparts.com/Main/PartD...spx?id=PFR7H10

Why people put the cheaper plug in is beyond me. Why buy the most expensive top of the line performance model (viggen) and cheap out on the plugs?
The tuners recommend them, and you can change them about 5x for the price you'll pay for one set of iridiums.
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Old 09-20-2008, 01:06 PM   #16
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the DI cassette does not like anything other than NGK plugs. running something else may work fine, may cause the car to not run well, may trash your DI cassette.
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Old 09-20-2008, 01:19 PM   #17
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the DI cassette does not like anything other than NGK plugs. running something else may work fine, may cause the car to not run well, may trash your DI cassette.
Absolutely right, Have tried other plugs and they just dont seem to like them.
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Old 09-20-2008, 02:06 PM   #18
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Which ones did you use? The recommended plug for the viggen is NOT the BCPR7ES. They will work but the recommended plug is the PFR7H10

http://www.eeuroparts.com/Main/PartD...spx?id=PFR7H10

Why people put the cheaper plug in is beyond me. Why buy the most expensive top of the line performance model (viggen) and cheap out on the plugs?
the platinum provides no improvement over the 7's whatsoever, only difference is longevity, so why would I spend that much on plugs?



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Old 09-20-2008, 02:08 PM   #19
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okay, someone fill in my ignorance...is there any particular reason why us saabers are "stuck" on ngk? Is there anything special about them that makes the other brands "not applicable"? I ran Denso's in my old prelude and they ran great. and what of these pulse-star plugs i'm seeing pop up in magazines? I've seen at least two before and after dynos and they look pretty convincing...or is just another turbonator? Some break down the science for me, please....
Saab di's were designed around the resistor/materials of the ngk's that's why the car will act weird with any other plug



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Old 09-20-2008, 02:28 PM   #20
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Which ones did you use? The recommended plug for the viggen is NOT the BCPR7ES. They will work but the recommended plug is the PFR7H10

http://www.eeuroparts.com/Main/PartD...spx?id=PFR7H10

Why people put the cheaper plug in is beyond me. Why buy the most expensive top of the line performance model (viggen) and cheap out on the plugs?

The ngk bcpr7es-11 run better than the pfr plugs and if you push it hard, the 7's are better. These have been tested and tested and none of the plugs run as good as the ngk bcpr 7es-11

The manual also calls for 6's, try running that in a staged viggen and see what you get.

I have tried a bunch of different ones and even the bad-ass irrediums did not idle and run as smooth as the ngk plugs. Many people have tried all types of plugs and many times the car does not run right and they are not sure why.

I would suggest you get some different type plugs and try them and see for youself which ones run best.

We are now finding the ngk bcpr 8es has less knock in the ecu than the 7's even and many are switching to those for better running cars with less knock, the 8's are colder than 7's and that is part of it, but they just seem to knock less with the ngk bcr 8es.

John
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