[LT1] Spark Plug gap - Do I need to change it?
08-29-2006, 02:27 PM
#1
Le Mans Master
Thread Starter
[LT1] Spark Plug gap - Do I need to change it?
I have a 383 with 12.x:1 compression, should I use the factory gap (.050) or should I decrease that or ? I had Autolite AP104's (about 1/2 step colder than factory) in my car and was running .05 gap and they looked like they were too hot of a plug still. Just picked up NGK TR6's and I was curious if I should decrease the gap to .045 or something or just go with the factory setting.
Also, I read somewhere to gap 1,2,7,8 at .055 because the cylinders aren't fed as well so you increase the gap to get a better spark kernal to fully combust the mixture. Anyone heard of doing this/tried this?
Also, I read somewhere to gap 1,2,7,8 at .055 because the cylinders aren't fed as well so you increase the gap to get a better spark kernal to fully combust the mixture. Anyone heard of doing this/tried this?
08-29-2006, 02:32 PM
#2
Large Impressive Member
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St. Jude Donor '04-'05-'06-'07
Believe it or not, my tuner recommended that I run .030". I didn't but I do run them at .035". No problems in many miles and they always look good when checked. I can't remember what his reasoning was but I'll ask him again when I see him soon. I thought it was kinda weird, but he did everything else so well that I thought I'd give it a shot. I just use standard (non platinum) plugs because I like to keep them fresh.
08-29-2006, 02:40 PM
#3
Le Mans Master
Thread Starter
I know with Nitrous and forced induction you are supposed to run like .035 and I thought it had to do with cylinder pressure so I was thinking that I might need to run a little bit less too.
