I've switched my LT1 over to LS2 coils and I'm curious if I should be running a different plug now? Obviously the stock ones work but are they the best?

Thanks

 

No. Run your factory plug and adjust the plug based on heat range required for your setup.

Plugs are determined by the heads (thread size ect), and heat range required for the motor. Spark gap is determined based on the spark intensity VS compression of the cylinder.

 

Thanks. My research determined the same. Now I'm trying to figure out the spark plug gap. I'm reading .05"-.06" I'm thinking .055"

 

This is how we tuned spark for years. Best done at a track

Start with factory gap. (on a custom built car like a rat rod we always chose 35 thou)
Make a few pulls.
If everything is good, open the gap up 5 thou.
Make a few pulls.
Keep opening the gap and making pulls until you a change in you MPH or you start to feel a miss.
At that point close the gap 5 thou.

That is your optimum gap for your tune and fuel.

if you change anything regarding your setup such as coils ect, you may very well need to go back and tune it all over again. The concept is you want the gap as large as possible to expose a larger spark kernal to the fuel mixture. This is also where you start to get into different plug designs and theories that brought Splitfire and aircraft plugs into the automotive industry. Some have some solid backing, others look good on paper but in real world wont change anything.

On that same concept, maximizing your spark gap isnt necassarily going to improve your track times at all. Dont over think it. A 40-50 gap will most likely be just fine.

Terry