Chevy13

What kind is everyone running? Any noticable gains with certain brands?

Anyone running E3's or Platinum 4's? They both did pretty good in my Colorado

843de

The majority of people who have experimented with brands and types other than the OEM type Delco Iridium plugs have not been happy. The engines were designed and optimized around the Iridium plugs, so why add another potential problem on top of your cooling system issues?

Chevy13

I haven't researched anything about spark plugs. I didn't know what worked well with the engines. It was curiosity. I am going to be getting new plugs before or after I install the Stage 1 kit

RobSSTurbo

Stick with ac delcos do not use E3 or +4 unless you want a new motor. Those plugs will not like boost and have a higher burn rate. I am running one step colder plugs NGKs 3757(I think that's the number) with 27 psi tune and have no knock at all.

hyperv6

E 3 plugs are like Splifires just a gimick. They work but just an expensive gimick as electricity follows the path of least resistance no matter what the plug is.

Just stick to the AC plugs that came with it as they will work as well as anything else you will buy. They are durable and the correct heat range.

Snoopy

Best advise, IMO.

The only time you may need to change to a different plug is when A LOT of engine mods are done and you are racing AT THE TRACK.

jay loukakis

I bought the E3 plugs had over 20,000 missfires bought Delco Ird. glad I did that was 25,000 miles ago.

RobSSTurbo

I had E3's in my camaro and it missfire so bad you'll think I had a 2 step. I took them right back the day I got them, crap!!

hyperv6

I also note some cars seem to be tuned to some plugs. Honda's don't like anything but NGK plugs. I have seen them misfire on other plugs and a change to NGK fixed the issues.

843de

Yup, Honda's like their NGK plugs, BMW and Mercedes cars prefer Bosch, and woe befall anyone who feeds a Chrysler anything except Champions.