I just finished up my turbo build on my 2005 gto its speed density, i had a centrifugal blower on it last year. My problem is my idle timing, i have it set at 24 degrees but idle advance is 4 degrees. so i started playing with the timing to see what happens and no matter what i set it to it is always 20 degrees lower ie i set it to 45 and it was roughly 25 i set it to 37 and it idles at 17. Set at 24 with only 4 degrees is bad because the fuel is igniting late in the headers and causing them to glow. if i set it to 45 degrees its great except the damn idle is at 2k because of the overly aggressive idle timing. can some one lead me in a right direction my head hurts from spending the whole day making changes.