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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

Fox Plug gap for gt40p heads

  • Thread starter Thread starter kendawg73
  • Start date Start date Nov 11, 2018
K

kendawg73

Well-Known Member
Feb 5, 2014
474
102
64
Nov 11, 2018
#1
  • Nov 11, 2018
  • #1
Since I'm using the GT40p heads (early ones with the internal EGR, so '97). should I use the plug gap listed for a '97 5.0 or stick with the '90 Mustang 5.0 gap? I'm not sure what the '97 5.0 explorer one is yet..
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
28,113
10,729
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polk county florida
Nov 11, 2018
#2
  • Nov 11, 2018
  • #2
The explorer plug gap for the 97 5.0 is 054-056, thats where mine were set.
 
K

kendawg73

Well-Known Member
Feb 5, 2014
474
102
64
Nov 11, 2018
#3
  • Nov 11, 2018
  • #3
General karthief said:
The explorer plug gap for the 97 5.0 is 054-056, thats where mine were set.
Click to expand...

cool, thank you...
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,349
18,084
224
Massachusetts
Nov 11, 2018
#4
  • Nov 11, 2018
  • #4
Plug gap is really dictated by ignition. You want to go as big as possible before you start getting misfire.

The explorers used DIS with two coil packs. Their ignition was a bit stronger so the gap is a tad wider.

I'd stick with mustang gap, but if you go wider and it still runs well...send it
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
28,113
10,729
213
polk county florida
Nov 11, 2018
#5
  • Nov 11, 2018
  • #5
Didn't even thing about the DIS ignition, it did run well though
 
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