Spark plug king?

**Spaz** · 07-09-2008, 06:04 AM

**JwMonE99** · 07-09-2008, 08:16 AM

This sounds interesting, i might want in on this as well but not at the moment.
(383 stroker coming soon...)

**Spaz** · 07-09-2008, 08:17 AM

i'm anxious to see the outcome!!!

**Mr. Luos** · 07-09-2008, 08:50 AM

#8 takes me 10 minutes.
Entire swap in about 45 minutes. Largest part of the time is the coilpack and valvecover removal and re-install.

And damn right I am a pussy Sarge.

Like I said, I have to verify I can get the dyno time.
And that I personally can find the time. Life has been pretty full lately.

**Spaz** · 07-09-2008, 08:53 AM

Originally Posted by Mr. Luos

#8 takes me 10 minutes.
Entire swap in about 45 minutes. Largest part of the time is the coilpack and valvecover removal and re-install.

And damn right I am a pussy Sarge.

Like I said, I have to verify I can get the dyno time.
And that I personally can find the time. Life has been pretty full lately.

are you serious??? i'm way to lazy to do that... i'd rather struggle underneath the car with 2' of extensions and a swivle socket...

**Spaz** · 07-09-2008, 08:53 AM

Originally Posted by Spaz

are you serious??? i'm way to lazy to do that... i'd rather struggle underneath the car with 2' of extensions and a swivle socket...

plus with my luck i'd have a quter fall out of my pocket and in to the heads and not see it when i put the vavle cover back on...

**Mr. Luos** · 07-09-2008, 09:01 AM

Originally Posted by Spaz

are you serious???

Damn right.

5-6 minutes of work to save 45 minutes.

**rbob93** · 07-09-2008, 09:42 AM

But why the valve cover??
I move the coil pack out of the way & find there's plenty of room.
Am I missing something??

**Mr. Luos** · 07-09-2008, 09:45 AM

Originally Posted by rbob93

But why the valve cover??
I move the coil pack out of the way & find there's plenty of room.
Am I missing something??

I have large hands. Just helps with the angles for me.

Also, I have an electric temp. sender right above #8...which limits movement as well.

Plus, doesn't hurt for me to check on my valvetrain once in a while seeing as I am running a 248/254 629/622.

**Eugenio_SS** · 07-14-2008, 06:54 PM

I have a few questions, though.

Ohm's law is not really applicable on a spark plug, the theory of electrostatics and Coulomb's law would be more appropriate.
Basics on a spark plug is on the stated above... you have electrically charged plates with a given distance from one another (gap).
Now, by increasing the voltage difference, you will reach a point where the attraction on the charged particles will exceed a threshold, and charges will jump from one side to the other, creating the spark.

Now, if you increase the gap, it takes more potential (voltage) for the spark to occur... the reverse is also true.

As for the internal resistance in the spark plug, it would limit the amount of current flying through the spark plug when in "spark" mode... ie when the voltage is big enough to cause the spark. (Remember that when no spark, there is no current, it's an open circuit).

Now let's consider the closed circuit when "in-spark".
With a 0ohm equivalent resistance, the whole charge would dissipate very fast, but stronger... a higher resistance will limit the current and make the spark last longer... yet the spark won't be as strong.

Now the questions:

1. Given that I have a certain amount of fuel and air in the combustion chamber, based on the car tuning... all being equal, for burning fuel, which is more efficient @ burning more fuel... shorter-time/more intense-spark or vice-versa ?

2. Can't the same result be achieved with changing the gap parameters ?

3. Let's assume the new spark plug actually burns fuel more efficiently, which means that it would increase the A/F ratio... which means I would have to retune the car with more fuel so I don't run too lean... if that is the case, then I can see where I can get more hp, because it's burning way more efficiently... but that can't be achieved with simply a dyno pull. That means I need to tune on the new plugs.

Let's say this is the case, and the spark plugs do that... which is a good thing for the product, actually... that means I should be careful on just putting those plugs and running WOT, cause if they are more efficient, my A/F is higher and I'm running leaner... I need to tune, and I can see getting some more power by running lean, but not a position I would want to be in ... if anything, I can add more fuel and still have a bit more power and feel better with the given A/F ratio.

4. have you seen that comparing back to back, by simply changing plugs that the A/F will increase ?... and by which extent ? This should give a good indication on the gains one could achieve with the "improved" plugs if they do as claimed.

I'm not bashing, but as an Electrical Engineer I still have some unanswered questions that I would like to be answered with some credibility, not with confusing and inconsistant nomenclature, mixing power, potential, current, as stated previously.