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Engine Nitrous on stock fox body plugs and retard timing questions

  • Thread starter Thread starter Foxstang31
  • Start date Start date Mar 12, 2019
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Foxstang31

Member
Aug 11, 2015
87
21
18
Mar 12, 2019
#1
  • Mar 12, 2019
  • #1
Recently bought a NX wet system for my 1990 mustang. Running a 140 fuel pump stock 19 injectors. I read that your supposed to pull timing 2* for every 50 shot of nitrous. Plan on running 150 shot so I would be pulling 6* right? Also what plugs and gap would you guys recommend for my setup?
 
F

Foxstang31

Member
Aug 11, 2015
87
21
18
Mar 12, 2019
#2
  • Mar 12, 2019
  • #2
I have GT40P heads and I’m running autolite 103’s at the moment which is a 2 step colder plug already. Should I gap them at .35?
 

Gear grabber

Well-Known Member
May 23, 2016
283
152
63
Mar 12, 2019
#3
  • Mar 12, 2019
  • #3
If that head is typical 14mm .750 reach,gasket seat.
I would use a non-projected plug,like the NGK R5671A-8.
NGK plugs are very popular with nitrous guys because of the soft ground straps.
It will act like a fuse,if things go all bad.
 
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