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What heat range of plugs to use?

  • Thread starter Thread starter neikoblu
  • Start date Start date Jun 28, 2005

neikoblu

New Member
May 9, 2005
63
0
0
Barksdale AFB, Lousyanna
Jun 28, 2005
#1
  • Jun 28, 2005
  • #1
I have tried many heat ranges but the way I figure it, is that I should be using a colder plug with the combo I have. I used a colder plug and it sputters on decel. When I had the hotter plugs, It didn't do it hardly at all. The thing is, is that when I pulled the hotter plugs out they, were basically fried. I Just put in the colder plugs recently and I checked them the other day. They seemed to have a lot of carbon buildup on them, but they werent wet or anything. So, what is a good temp. plug or brand to buy, and what is a good gap to set them at? 53 is what I set mine at. motor specs.
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ss93cobra

Founding Member
Apr 10, 2002
1,422
1
0
Wilmington NC
Jun 28, 2005
#2
  • Jun 28, 2005
  • #2
Did Edelbrock have any recommendations with the heads?
 

vristang

15 Year Member
Mar 31, 2005
4,933
101
124
Seattle
Jun 28, 2005
#3
  • Jun 28, 2005
  • #3
Personally I would stick with a stock range. Your combo isn't wild enough to have really extreme demands the way nitrous or boost would. You can open the gap on the plugs a little with the MSD ign. and coil. I think I have run 57 or so without problems, but I would have to look that up (this was in the 302, not the motor I describe in my sig).

Is it possible that something else is causing the problems you describe on decel. Maybe a fuel issue? Too much pressure? I'm just thinking out loud.

Does anyone out there have a guide to temp range selection they could post?
 

z9_87

New Member
Apr 16, 2004
332
0
0
Urbana, IL
Jun 28, 2005
#4
  • Jun 28, 2005
  • #4
I'm running a slightly colder plug also and it sputters a bit in the low rpm's. Never really contributed it to that but I'll have to try that next time or maybe soon to see if there's a difference.
 

04sleeper

Founding Member
Jun 22, 2002
2,674
14
89
Dallas, TX
Jun 28, 2005
#5
  • Jun 28, 2005
  • #5
I would run Autolite 3924's or similar gapped between .45 and .50
 
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