07musclemustang

Hello all. I am just under 14k KMS and im thinking plug change and I have heard that copper plugs 1 range cooler is the way to go but they have a more frequent service interval... I would like to get a bunch of opions and specifically brand names and product numbers if possible. it would just make my life easier and besides im thinking changing the plugs sooner rather then later as the chance of seizing makes me a little sick to my stomach.

fosman77

I think i am going to try the one peice Champions.

P Zero

Just use the OE plugs. Maybe pull the ones you got put a little anti seize on em and be done with it. Arent the OE plugs platinum anyway?

Contrary to popular belief changing you plugs will net you 0 power gain. Unless you're running forced induction, nitrous or have drastically raised compression, just use the original equipment ones for best results.
-P.
PS: I am a certified heavy engine mechanic and I recommend that from experience.
PPS: Dont use champions - heres what you should use based on car manufacturer
NGK or Nippon denso - Pretty much any Asian car.
Bosch- European cars BMW, Mercedes, Audi, Porsche, etc.
Champion/MOPAR - Chrysler products.
ACDelco-GM
Autolite/motorcraft-Ford.

Goldenpony

I am running Champion #7989. Couldn't be happier, car runs super. I sleep easy not worrying about seizing. Champions run fine in my Ford.

cavediver

The OE plugs are two-piece and prone to problems. I run Champion #7989 which are traditional one-piece design and won't separate like the OEM's. I've had them in since last spring and the Mustang runs great.

I did not install them for better performance. Like many others, I installed them to eliminate the potential problems the OEM's presented.

The "don't use Champion's in a Ford" is simply an old wives tale. The Champion 7989 was designed specifically for the Ford 4.6 and 5.4 modular engines.

I couldn't be happier with my decision.

P Zero

When I ran anything other than Autolites in my Fords i had serious issues. But hell I had issues with most plugs until I found a non resistor race plug for the stang. I would literally melt the electrodes right off of em, and that was on straight pump gas.
As far as every non-modded car Ive worked on, if the cars were throwing misfire codes, that was the first thing I checked. And 9 times out of 10 they had a non OE plug. Id replace them with the proper OE plug and their misfire would go away. And it didnt matter on the brand of the vehicle either. Happend on an escort that had delco's in it that were 2 months old to my bro's BMW when he got the cheaper Bosch plug that also only lasted a couple of months(dont put +4's in anything), or honda's with champions, etc. etc.
-P.

cavediver

I've seen lots of spark plugs causing miss-fires and other issues but in EVERY case the problem was 'user error'. I found broken porcelain insulators, improper gap, too much anti-seize ending up on the electrode and loose plugs. I have NEVER found a plug to miss-fire that wasn't damaged in some way.

You will never convince me that a Champion plug 'knows' it is in a Ford and won't run right or that a Bosch 'knows' it is in a Chevy and will miss-fire. Spark plugs just aren't that smart.

Spark plug design is very basic and has changed little in the last 75+ years. Yes, we have platinum, iridium and different heat ranges and such but the basic design is the same.

No different than "all Chevy's are junk", or "Pepsi is better than Coke"..............emotional comments, not factual comments.

SirKnightTG

I have almost 49K miles and I am still on the original plugs. Everything is working perfectly fine and I see no need to change them. I don't see what the big deal is about changing plugs so soon when they're still in perfectly working order. If you have that much extra money to burn might as well just send it to me. I'll put it to good use.

I understand needing different plugs for FI but otherwise keep what you have and change only when necessary.

And about the seizing issue, unless you pulled the plugs and did something to prevent it when the car had almost no miles, it's very likely you may run into that issue by now. Just follow the TSB about removing the plugs and you'll be fine.

Goldenpony

Yea, what he said!

07musclemustang

thank you all for your 2c I think the pull em and inspect and put antiseize is a good idea but i read somewere that copper was actually the best but caused a more frequent service interval and the only reason platnum is being used is for service interval times. therefore lowering the manufacturs "owner costs" for any who are wondering the source is SCT