Bmr4life

I was talking with my co-worker about my Detroit Rocker cams and they were dead set that I'm missing out on performance by still have the OEM plugs in the car.

Is there any merit with that for our engines? I'm nearing 70k and plan on changing the plugs soon anyway. So I guess I need to know if I should stick with OEM or get something else.

Bmr4life

Hmm. I take it they don't.

So, what plugs should I get then. I'm hitting 70k soon and would like to change them out. Is OEM the best thing to get?

SCCAGT

Dont see any reason to change plugs just because of cams. Not like you are increasing cylinder pressures like in a forced induction situation. Any plug you get is an OEM replacement except for temperature range. I think you should ask your resident "mechanic" what you should replace them with just to put him on the spot. See how intelligent his response is. If he says to use Splitfires, Bosch +4 s, or those new E3's, he's full of poop. You should start ignoring him from that moment forward.

Bmr4life

He's a friend of mine and has a Grand National so he's focused on plugs for FI.

He didn't say which plug to buy because he admitted he didn't know. He just said that changing the type plug can change performance. He mentioned hotter versus colder and copper versus platinum. We both assumed that my stock plugs are platinum since they're supposed to last 100k miles.

timmbo

With all due respect he needs to research the 4.6 modular engine before recommending anything. There is no need to change plugs for any cam mod on these engines. Forced induction or nitrous absolutely. Tell him to call Brenspeed if he still can't grasp it.

Bmr4life

So what plugs do NA people use? Any particular brand?

Also my friend just recommend that I ask to make sure I wasn't overlooking anything. It was a kind gesture.

timmbo

Champion 7989 plugs are a one piece plug that will never break in two upon removal like the stock two piece Motorcraft plugs. I'm sure you've read the horror stories of the two piece plugs. I highly recommend the Champions. Never a problem when I ran them with my Hot Rod cams. Car ran strong and perfect.

JIM5.0

I remember splitfires. They were some seriously overpriced snake-oil plugs, and they didn't do S*** to increase power, MPG, or driveability.

I literally cringe and get pissed off when I hear splitfire. They do not even have platinum cores, yet they used to cost just as much as platinum core plugs!

Franchi

No, cams don't require non OEM plugs. You might want to change yours out but that's only cause of the potential breaking of the OEM ones. I put Brisk 1 step colder plugs in mine when I did my Comp Thumpr cams at 32k miles but the plugs were more of a preventative measure for the future.