hey guys when i put new plugs in my car i was in a hurry and i never gapped them is this going to hurt me performance wise cause i dont even no what the car is liek if they are gapped cause i did the tune up before i was able to drive it does it realy make that big of a difference if u dont gap them or should i take them back out and gap them.

its an 83 z28 with a lg4 305 with the folowing mods

Carter AFB competition series carb

weihin stealth intake

hooker competition headers

mild crane cam

new cap, roter, plugs and wires

new alternater

new electric feul pump

 

What brand plugs? AC Delco's usually come gapped. If it really bothers you though just take them back out and check, nobody on here can tell you for sure.

 

yup they are delco so im not going to bother with them

 

not sure about Delco's coming gapped

all the recalls we have been doing require new plugs and ICM, i have had several (more than several actually) AC Delco plugs come out of the box either closed or gapped very tight (about .025 or less)

some of the guys throw the plugs in without gapping them :nono:

 

btw, not trying to be mean, buts a poor attitude to have, especially when it comes to your own car

 

i put a set of delcos on a friends truck the other day.. they were less than .025 of a gap.. on some they were actually touching.. this is on a 350 that should have been .045 and they were bought from gm for the specific vehicle.. so i wouldnt count on em coming pregapped.. and yes depending on how far off your gap is it can effect proformance quite a bit. just pull a few out for piece of mind and check the gap.. if they are all right on and exactly the same i'd feel a little better about it.

 

I suppose I haven't bought enough Delco plugs to justify the "usually" statement above (my apologies), but I can say with certainty that some do. The last couple of sets of AC Delco's I've bought have been gapped at 0.35 consistently out of the box. Even then, I didn't say they all came like that, so I strongly suggest that you pull them out and check.