Anyone know the various NGK Plug numbers that fit a Rotary?



I read an article on the NET of a guy that gained 18 HP with a N/A (Yes on a Dyno) by switching to hotter 11.5 plugs.



He is running a Haltech also.



It's a PP motor but he started with just 150 HP and Haltech Tunning got it up to 270 HP.

 

11.5 plugs are colder than stock. If your car is mostly for the street then running BUR9EQ's should be good enough. That's what I run. What are you using now?http://www.motodepot.com/street/engine/ngk...gk_special.html seems to have the best prices on the cold plugs.

 

I'm running the stock plugs.



I tried 2 sets of Leading plugs in it also. I didn't really notice any change, But that was just on startup. I didn't really do any runs with them.



THANKS for the link.

 

The leading plugs are hotter than the trailing plugs.