I diagnosed my car to find out that the engine is running rich unless under WOT. My friend and I think that maybe running a spark plug with more arms to get a larger spark would help in performance. Would this work or is it a bad move and I should just get 1 armed ones?
Engine is a j35z2

 

running rich has very little to do with the spark output unless its a complete misfire. you have a different issue. plus multi electrode plugs always end up causing misfires.

 

more "arms" are not better for performance and Kyden is right, you need to find out why your car is running rich to begin with and fix that.

 

What's most likely causing it is my custom intake. Its a short ram with a tube led to the front bumper for cold air.

 

That shouldn't cause a problem unless there's an air leak or something.

 

I'm pretty sure that its the intake. There are no air leaks. it was always a problem to all j35z2 engines when installing an intake

 

does your intake have a factory mass air sensor in it? What make air intake are you using?

 

Yes, its the OEM Sensor. Its all custom (Spectre lol)

My concern is just when I'm not racing (Legal racing i mean, not street racing) that it runs rich, whenever its WOT it doesn't run rich, it has a perfect mixture

 

Right. How's the idle quality and drivability? Just wondering if the car drives and acts the same as with the stock intake, except for the running rich part now?

 

Feels exactly the same as the stock intake, just pulls harder when under WOT :D Idle is perfectly fine too, no difference, I had my friend run a scan while i drove around and it was running slightly rich, but not enough to throw a Check Engine Light

 

mass air sensors are pretty accurate and more adaptive than speed density (MAP) systems. It shouldn't run rich so I'm not sure why it does. I would keep your spark plugs stock and just change them more frequently if you find them fouling.

 

Ya, after reading earlier posts, I decided to just do exactly what you said. What about running a spark plug that would give a bigger spark? Or would that just be a waste of money/time (And possibly engine)

 

Your engine already makes plenty of spark, you need to reduce the fuel going in or increase the airflow to match it. Maybe a free flowing exhaust will help.