Spark plugs (gap size)

[Justin23454]

If I dont have the peice to check the gap size, what could I just to check it, I just bought the AC Delco Iridium yesterday and wanna put them in SAt. when I do my headers, anyone know what else I can use to make sure they have the right gap?

[346ci]

You can go to NAPA or somewhere and pick up spark plug gap measuring tool for around $5, they're usually inexpensive.

[Justin23454]

alright, what size gap should I have in it?

[robcas47]

just go to the nearest auto parts store and right next to the cash register they sell the half dollar size gap mesuring/adjusting tool. then just ask them to look it up in thier computer system and you should be good as far as proper mesurements. that lil tool only cost like $2 at the most.

[35thAnniZ28]

oh ask in autozone or advance i think..theyll tell you at the counter...they should have it stored in the computer

[hoss 2000 z-28]

I used NGK TR55's and gapped them at .45 I was told by a very reputable LS1 guy around here that these plugs and this particular gap was good for N/A applications. I think the iridium plugs are best for FI? Not sure what gap for your application though.

[Loudz28]

i got ngk tr55s and left them at the gap they came with. i think .50

[hoss 2000 z-28]

That's right

[splitfinger09]

stock gap on my 2000 was .060