emissions test completed

[Terry Stapley]

I got through my 2nd emissions test today and passed 3 out of four categories. My 418 failed the idle HC ppm miserably. The cam is very radical and i am wondering if anyone has suggestions on how to lower my idle HC? I have drilled a 3/32 hole in each of the primary butterflies on my holley 750 DP. Would changing the power valve to a lower number help?

[Cobra20646]

I've heard that increasing the idle speed during the test will help pass.
If your idle vacuum pressure is below that of the power valve rating, you may have a problem. Take an idle reading and install a power valve with a rating of a few inches over that.