Spark plug ????

[sleepermobile]

I searched it and got nowhere!!!! I checked the gap and they were at 40. Under the hood says 52-56 and I read here that guys are going 55 or so. So I gapped them at 48 figuring it would be in the middle, for now. It runs smooth and sounds quiet compared to before at 40. It feels much different cruzing in fifth???? So what the h-ll should they be gapped at??? Should I throw some back in at 40 like the tuner did??? I did have it dyno tuned and thats were he had them set but I dont see anyone else going 40??? WTF?? The plugs were in for well over 10,000 miles and looked very lean.

 

[01yellercobra]

The .054" is the stock gap for an N/A motor. The gap usually needs to be closed because of spark blow out with boosted motors. Be careful going to WOT.

 

[281CJ]

I'd set for .042, and check for detonation.

 

[sleepermobile]

Thanks to both of you!!!!! I guess I get to change them again tomorrow:banana: So whats the best brand and plug number??? I want to be able to buy them at Autozone or Napa!!! I hate when I start fn with stuff that isnt broken!!!!

 

[281CJ]

Go with NGK TR6's or 1 step colder Motorcraft plug, think it's a #22

 

[01yellercobra]

I use Autolite 103's gapped at .030". I'm at 12psi.

 

[Brutal Metal]

You got a Vortech installed right? .048 is TOO WIDE, gap them to .035, TR-6!

 

[99cobra09]

So what gap do all you N/A people set there plugs to?

 

[no_slow_svt]

.040 is just fine for an n/a car, its not going to hurt anything.
chances are you just had some old/bad plugs, and thats why you noticed the difference in how it runs.

I also run the NGK TR6's havent ever had any issues with them

 

[Quadcammer]

Run the largest plug gap you can without blowout.

 

[99cobra09]

So the more the gap the better, right?

 

[Quadcammer]

yes

 

[Brutal Metal]

Run the largest plug gap you can without blowout.

My car overall runs way better with an .045 gap over an .054, that factory setting is too wide in my opinion, but opinions are like assholes, haha!!:lol:

 

[sleepermobile]

Well I went with what the tuner used, champion RS9YC gapped at what my tool says is 40. Interesting I used a new gapper from Autozone and a new one from Napa, both were way different than mine. Mine measures 40, the others were 30 and 35........... They were all the little round 99cent ones, so BE CAREFUL!!!!!!!

 

[Brutal Metal]

Are those Champions copper core??

 

[Quadcammer]

My car overall runs way better with an .045 gap over an .054, that factory setting is too wide in my opinion, but opinions are like assholes, haha!!:lol:

no it doesnt

 

[sleepermobile]

Are those Champions copper core??

Copper Plus 2 bucks ea

 

[K2AHollywood]

no it doesnt

lol

 

[Brutal Metal]

no it doesnt

yes it does!

 

[Quadcammer]

If your car runs better and develops more power with a tighter spark plug gap (when the larger gap did not cause blowout), your vehicle flies in the face of common automotive knowledge.

Did you buy your engine from the guy who sold jack his beanstock beans?