383 N/A Plugs
383 N/A Plugs My 383/Trickflow heads will have 11:3 compression. Using this thread: https://ls1tech.com/forums/removed-locked-thread-graveyard/456380-spark-plug-reference-chart.html should I go with the Autolite AR3911? Doing a search, it seems that more N/A modded lt1 owners prefer the Autolites over the NGK. I will gap the plugs at .40 from what my shop instructs.
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Originally Posted by moserman
im using ac delco plugs from any GM dealership, ive had trouble with other plugs misfiring and was told to just stick to stock plugs.... havent had a problem!
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Originally Posted by Evaporate
What are your mods?
383 stroker from golen engines, ported heads, ported intake, cam, injectors, intake elbow, moroso CAI, full exhaust, roughly puttin out 500 crank horse
Joined: Nov 2001
Posts: 10,023
Likes: 6
From: LT1 land...the "409" of the 90s!
I am much happier with the Autolites. Running AR93s right now.
Ed here clued me in on them
Car run's much cleaner N/A with them then they did on the NGK's...and i have been running NGKs for years
Ed here clued me in on them
Car run's much cleaner N/A with them then they did on the NGK's...and i have been running NGKs for years 
Originally Posted by TwoFast4Lv
I am much happier with the Autolites. Running AR93s right now.
Ed here clued me in on them Car run's much cleaner N/A with them then they did on the NGK's...and i have been running NGKs for years
Ed here clued me in on them
Car run's much cleaner N/A with them then they did on the NGK's...and i have been running NGKs for years whats the difference from the AR93s and the 104s
