Best Overall Spark Plug ?

all1knew

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Jun 3, 2013

#1

• Jun 3, 2013

• #1

Hello all,

What's everyone's opinion on the best spark plug for a daily driver on 93 Octane?

Bill

 

srtthis

the guy doing it does every local racers rear end

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#2

• Jun 3, 2013

• #2

NGK...

 

85_SS_302_Coupe

it sucks (I know) to be on the receiving end

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#3

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• #3

The most basic copper plug you can find. Avoid hype, avoid anything that has "split" or "fire" or "platinum" or anything referring to enhanced performance. That is assuming the engine is stock, but then if it's stock why are you running 93?

 

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f8tlfiveo

My wife likes my spool and blow-off valve.

Aug 8, 2007

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Jun 3, 2013

#4

• Jun 3, 2013

• #4

85_SS_302_Coupe said:

The most basic copper plug you can find. Avoid hype, avoid anything that has "split" or "fire" or "platinum" or anything referring to enhanced performance. That is assuming the engine is stock, but then if it's stock why are you running 93?

Click to expand...

I agree.. Copper plugs all the way. My motor is stock with the timing bumped, that's the only reason I run 93

 

all1knew

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#5

• Jun 3, 2013

• #5

I've hear good things about NGK, but is there a part number I should be looking for that is best for us?

Not a stock motor, heads, intake, exhaust and all the other bolt on goodies.

Bill

 

srtthis

the guy doing it does every local racers rear end

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#6

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• #6

depends on your heads different heads use different plug seats and different reach's...

 

all1knew

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#7

• Jun 3, 2013

• #7

sorry about that. I have Twisted Wedge heads.

 

srtthis

the guy doing it does every local racers rear end

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#8

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• #8

stock short block?

 

all1knew

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#9

• Jun 3, 2013

• #9

from the car domain link in my signature:

Valvetrain:
Trick Flow twisted wedge cylinder heads
1.72 SVO roller rocker arms
FMS Double roller timing chain
Keith Black flat top pistons

Read more: http://www.cardomain.com/ride/568764/1992-ford-mustang/#ixzz2VBJN1C21​

on a stock block, yes.​

 

srtthis

the guy doing it does every local racers rear end

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#10

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• #10

id go with an NGK 3924 with out knowing your overall compression. im pretty sure thats the one for a stock heat range plug

 

all1knew

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#11

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• #11

thanks for all the help bud.

 

srtthis

the guy doing it does every local racers rear end

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#12

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• #12

no problem...

like i said im pretty sure thats the correct heat range but not 100%. im sure some one will correct me if im wrong

 

mikestang63

SN Certified Technician

Aug 27, 2012

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#13

• Jun 3, 2013

• #13

Hard to beat the tried and true Autolite copper plugs. Agree avoid the "hi performance" Splitfire, E3, or platinum plugs. Pure waste of money and I've seen them foul more times than I can count. Even on my blown or nitrous cars I went with colder autolites and never had a problem.

 

85_SS_302_Coupe

it sucks (I know) to be on the receiving end

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#14

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• #14

Buy the cheap ones, replace them often. If you get bored, look into indexing and strap modifying...If nothing else I've found some pretty significant improvements in throttle response on my car by using both.

 

aar0s

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#15

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• #15

Ive heard of indexing but not strap modifying, more info please?

 

srtthis

the guy doing it does every local racers rear end

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#16

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Y

aar0s said:

Ive heard of indexing but not strap modifying, more info please?

Click to expand...

You can cut back the strap to the middle of the electrode to help project the "flame". If you look at a true racing plug they have short ground straps

 

aar0s

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#17

• Jun 3, 2013

• #17

ahh, seems like ive heard that called side indexing.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

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#18

• Jun 5, 2013

• #18

NGK is the OEM plug for Nissan/Infiniti. They are good quality plugs. They also make copper versions, in addition to platnium and iridium.

With a stock fox Mustang, i'd recommend copper. Most of the time, i'll say get copper OEM motorcraft plugs.

BTW Motorcraft and Autolite split ways in the 60's. Their plug machines are the same, but they are not the same plug despite looking identical. I've "heard" that the motorcrafts plugs specs are tighter than Autolite

 

cenok is family

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#19

• Jun 5, 2013

• #19

Motorcraft sp-450. No reason to spend more money on spark plugs unless you're running forced induction or a radical n/a setup.

 

85_SS_302_Coupe

it sucks (I know) to be on the receiving end

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#20

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• #20

aar0s said:

Ive heard of indexing but not strap modifying, more info please?

Click to expand...

Here ya go. http://performanceunlimited.com/documents/plugsidegapping.html

 

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