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  • SN95 4.6L Mustang Tech

? about spark plug gap

  • Thread starter Thread starter Jinx
  • Start date Start date Mar 16, 2009

Jinx

I like cats, cats like me. Cats and I fully agree.
20+ Year Stangneter
Oct 2, 2003
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Cat Country
Mar 16, 2009
#1
  • Mar 16, 2009
  • #1
OK, it's time for me to replace my plugs. I have the motorcraft platinum plugs with the longer threads. They are pre-gapped at .054.

My question is:
With a Predator HP tune, advanced timing and premium fuel, should I alter the gap to be smaller or larger by any amount, or should I just check to make sure they are at .054 and plug-n-play?
 
2

2002BLGT

Well-Known Member
Dec 18, 2003
2,945
4
59
Bedford VA
Mar 16, 2009
#2
  • Mar 16, 2009
  • #2
Jinx102672 said:
OK, it's time for me to replace my plugs. I have the motorcraft platinum plugs with the longer threads. They are pre-gapped at .054.

My question is:
With a Predator HP tune, advanced timing and premium fuel, should I alter the gap to be smaller or larger by any amount, or should I just check to make sure they are at .054 and plug-n-play?
Click to expand...

anywhere from .050 to .054 will be fine if you are NA
 
B

blksq10psi

Member
Aug 1, 2008
114
0
16
PHILLY
Mar 16, 2009
#3
  • Mar 16, 2009
  • #3
no reason to change the gap yet keep it
 

Tim2002GT

Founding Member
Apr 10, 2002
635
4
29
Tulsa, Oklahoma
Mar 16, 2009
#4
  • Mar 16, 2009
  • #4
Unless your going blower, turbo, or nitrous I would keep the stock plug gap.
 

Jinx

I like cats, cats like me. Cats and I fully agree.
20+ Year Stangneter
Oct 2, 2003
12,166
4,237
223
Cat Country
Mar 16, 2009
#5
  • Mar 16, 2009
  • #5
I was mainly curious, because I have read in here that some people will go with a slightly tighter gap on the copper plugs (due to the fact that they wear faster and a slightly tighter gap will help lengthen the time before a removal and re-gap is needed), and was wondering if this was applicable to the platinums.
 

mrvax

Stay thirsty my friends
Founding Member
Nov 29, 1999
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79
SN Moderator: Orlando, Fl.
Mar 16, 2009
#6
  • Mar 16, 2009
  • #6
Nah. I use copper and .055. It's good right there.
Always check the gap when you buy new plugs before the install.
 
2

2003_GT

New Member
Nov 5, 2008
69
0
0
Santa Fe, NM
Mar 17, 2009
#7
  • Mar 17, 2009
  • #7
I would recomend going with the motorcraft sp-505 plugs because they are at a lower heat range than the sp-493 which are the same as the stock one, keep your gap at .054
 

Jinx

I like cats, cats like me. Cats and I fully agree.
20+ Year Stangneter
Oct 2, 2003
12,166
4,237
223
Cat Country
Mar 17, 2009
#8
  • Mar 17, 2009
  • #8
mrvax said:
Always check the gap when you buy new plugs before the install.
Click to expand...


Always

Well got the plugs, now just have to find the time to do it (no garage .)
 
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