Spark Plugs

[dansilva929]

I'm considering changing out my plugs pretty soon(I've got about 30,000 on the car) I was wondering if it will be necessary to change the spark plug wires too?

 

[SpartaPerformance]

You don't have wires, the Mustang 3v motor has coil on plug ignition. You can swap out the coils with performance ones and get 1 step colder spark plug supposedly that is good for like 20RWHP when tuned for it.....if anybody can confirm this I'ld like to know also!!

 

[mhanksii]

You don't have wires, the Mustang 3v motor has coil on plug ignition. You can swap out the coils with performance ones and get 1 step colder spark plug supposedly that is good for like 20RWHP when tuned for it.....if anybody can confirm this I'ld like to know also!!

Bump, Me too. I would pay for that mod for 20RWHP!!

 

[ski]

Unless your S197's engine is S/C, T/C, or juiced, then save your $. Aftermarket COP's and colder plugs add little or no power, and definitely not 20 hp, to a N/A S197.

 

[zeindog]

The cop's are fine and what I have read aftermarket ones do little if nothing for you, even some cases they hurt performance. Dont go to a cooler plug unless you are running a power adder, if you do you might have a harder time starting the car, plug fouling or poor performance at low rpms.

 

[JOELZORRO]

I JUST SPOKE WITH A RACING TECH FROM AUTOLITE ON THE TORQUE SPEC FOR THE S-197 GT MUSTANG 4.6 LITER ENGINE. HE INFORM ME THAT YOU SHOULD TORQUE THERE HT-1 SPARKPLUGS TO 12 TO 15 FOOT POUNDS NOT TO 25 FOOT POUNDS LIKE PEOPLE ARE SAYING ON THIS FORM SITE. ALSO I CONFIRMED THIS BY TALKING TO MARTIN FROM BRISK SPARKPLUGS OUT OF THERE HOUSTON OFFICE. I THINK THERE IS A PROBLEM WITH CYLINDER PRESSURE THE BLOW BY AROUND THE THREADS AND SEAT OF THE PLUG IF THEY ARE OVER TORQUED. BY THE WAY AUTOLITE MAKES THE MOTORCRAFT OEM PLUGS FOR FORD FOR THIS ENGINE DESIGN.