The Gap Thread - Spark plugs
#1
The Gap Thread - Spark plugs
I'm picking up my new engine on Saturday and already purchased a set of NGK BR7EF plugs. Most seem happy with their performance but what gap would you recommend I run? I'm pushing max ~19-20psi from a F1A and was thinking 0.028-0.030 would be ideal. Not that it should matter but this is a LT1 car.
#5
TECH Apprentice
Use as much as you can get away with. Ive had to bring the gap to .016 on mine when i was at 26psi. More than that and the coils wouldnt fire and the engine would break up badly. I was at .24 at 18psi.
Whats the ingnition system consist of?
Whats the ingnition system consist of?
#7
I was running AC Delco R42-LTS when I was pullied for 15-19 lbs (710rwhp) of boost and didn't appear to have any issues. Gap was 0.035 but on recent inspection, they appeared to be a little hot for the combo. I am running the EFI LS1 PCM conversion for the LT1 cars so I no longer have an opti. The conversion uses 8 LS truck coils and the LS1 PCM. It's been a great setup so far.
Sounds like somewhere around 0.030 should be a good starting point.
Sounds like somewhere around 0.030 should be a good starting point.
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