Hello,

I just rebuilt my D16Z6 with P29 piston. I have running right now for about 500 miles on it but I will like to know what type of spark plug (model or number from NGK) are required for this setup, and also the degree on the timing to prevent knocking. The car is running right know on premium fuel and the stock D16Z6 spark plug but the color of the spark plug are really brick red and I don't know if that is normal or not. And about 3K RPM I have some knocking on partial open throttle, but on WOT will disappear.

Please help with this setup. This car 95 Civic EX is my daily driving car and I will like to have it running smooth and with power.

Thanks for the HELP!!