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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Old plugs won't work with my GT40's?

  • Thread starter Thread starter pwcracer
  • Start date Start date Jul 14, 2005

pwcracer

Founding Member
Jun 13, 2000
347
0
16
Hastings, MN, USA
Jul 14, 2005
#1
  • Jul 14, 2005
  • #1
I had autolite 24 in my E7's and they won't go into the GT40's.. It seems the part right above the threads is too fat. is there another plug i should use (Kenne bell rec the autolites)
 

rd

Founding Member
Jan 12, 2000
3,316
63
109
Ocean Springs MS
Jul 14, 2005
#2
  • Jul 14, 2005
  • #2
The plugs from my 79 heads would not work either.

Get plugs for a 93 Mustang Cobra 5.0, they fit.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,257
17,941
224
Massachusetts
Jul 14, 2005
#3
  • Jul 14, 2005
  • #3
Autolite 764's
 

pwcracer

Founding Member
Jun 13, 2000
347
0
16
Hastings, MN, USA
Jul 14, 2005
#4
  • Jul 14, 2005
  • #4
Thats just what i found out at my local parts store, but i wanted 1 range colder for the blower, which would be a Autolite 2543 and i was told they no longer make them. I could get Champions, but Kenne bell doesn't rec them at all... Hmm...
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,257
17,941
224
Massachusetts
Jul 14, 2005
#5
  • Jul 14, 2005
  • #5
What are the motorcraft equivalents??

I think the stock plug is 42C (or could be 32C....one of those is for E7's and the other is GT-40P) and then look up 1 range colder for that plug.
 

stanglx2002

CT Material here
15 Year Member
Jul 7, 2005
1,563
1,110
164
Jul 14, 2005
#6
  • Jul 14, 2005
  • #6
autolite 25's is what i have in my GT40's
 

50bomber

New Member
Aug 30, 2004
116
0
0
Galvatraz, TX
Jul 14, 2005
#7
  • Jul 14, 2005
  • #7
My GT-40Y use ASWF-32C, which is an extended tip spark plug, one rangle hotter than stock.....When I had the heads off the car, i tried playing around with old plugs from my E7s and the tip does not extend far enough into the cc, its shrouded in by the thread by like 3 mm. not a good thing. Do yourself a favor and get correct plugs, they are only like $1.49 a pop at Pepboys.
 

super302

I'd do anything for free Bapples
May 29, 2004
2,878
1
0
Davenport, IA
Jul 15, 2005
#8
  • Jul 15, 2005
  • #8
Mustang5L5 said:
Autolite 764's
Click to expand...
 

millhouse

Founding Member
May 14, 2002
1,985
0
46
Simpsonville, SC
Jul 15, 2005
#9
  • Jul 15, 2005
  • #9
Autolite 764's are the stock plug's for the gt40's and gt40-p's.

One heat range colder would be the autolite 103's. Thats's what I run, and the work great!
 
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