LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

What plugs do you run with your AFRs?

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Old Apr 29, 2005 | 09:55 AM
  #1  
WS Sick's Avatar
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From: Oklahoma where trees are made of wood.
What plugs do you run with your AFRs?

I have the 190cc AFRs and they require the gasketed plug, I am using the autolite they recomend but have been unable to find a heat range chart for these. What do you guys run when youve added power?
Old Apr 29, 2005 | 10:31 AM
  #2  
Deenasty's Avatar
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From: San Francisco
Re: What plugs do you run with your AFRs?

I am currently running an AC Delco FR3LS, if you want colder go with a FR4LS. If you want to run an NGK, run a BKR5E.
Old Apr 29, 2005 | 04:42 PM
  #3  
97 WS6 T/A Conv's Avatar
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From: VA
Re: What plugs do you run with your AFRs?

I was told the AC FR3LS would be discontinued and replaced with AC 41-629. I switched over about a year ago and have had no problems. I ran all of my 11 sec passes using 41-629 what's even better is they were gapped right straight out of the box. I run .035.
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