Before I was running bosch platinum +4's in my car and my Egt gauge was reading at about 1,400F on my third gear pulls but now that I switched on over to the Denso Iridiums and gap the plugs at .035 I'm hitting 1,600 degreesF. This is not to shabby. I need all of your experimental guidence. So please help me out brothers. I'm running the Star stage 1 turbo kit. Help me solve this problem. What are all your suggestions. Thank you.