[Texasdoc]

I'm tuning the secondaries on my Holley 670. Right now I can feel when the secondaries open. It doesn't bog or hesitate, it just pulls harder. The Holley instructions state to use a lighter spring until you feel it open, then go back one. Since these cars are so light, and since I don't have a bog, do I need to go to a stiffer spring? Or just leave it in place? Some day I can try to record 15-60mph times and compare, but just wondering.