How do I gap new ac delco spark plugs

anthony mendoza

New Member
what centimeters or millimeters do I get new spark plugs for my 87 Buick grand national I don't know what number to use to gap it someone please help
 
What kind of power and boost are you running? The people I know only run .035 at the track. On the street, we like to run .032, but most seem to like a tighter .028.
 
What kind of power and boost are you running? The people I know only run .035 at the track. On the street, we like to run .032, but most seem to like a tighter .028.
Ummm LOL why change to a larger gap at the track? Id find new friends haha :)

Buy NGK UR5 spark plugs gap em to .32 and enjoy
 
Ummm LOL why change to a larger gap at the track? Id find new friends haha :)

Buy NGK UR5 spark plugs gap em to .32 and enjoy
Ok, son...keep blowin shit up [emoji106]
IMG_20160718_225918268.jpg
 
9 second guys around here are running .022". I liked my Ur5s at .028 in my old engine. Going to try tigher.;)
 
I'm interested in hearing about various experiences with the different plug gap dimensions.
 
I would gap them back at the parts store and exchange them for NGK's.

I've had my last shot of AC Delcos being bad out of the box about 2 years ago. Much like Delco oil filters they seems to have went to shit too.
 
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