[bigrob]

I have noticed my secondaries, which are vacume operated, open kind of high in the RPM range, so I have ordered a 7 pack of assorted springs as well as a "quick change" adapter to make swapping them out quite easy. I just want to find a lighter spring that will enable my secondaries to open sooner at a lower RPM. The booklet that came with my carb, says I have the Black spring in it, which is the stiffest one. Is there anything special I need to know? The instuctions & tech tips in the Holley instruction sheet for the spring swap seem pretty thorough, but I wanted some opinions as well!

Thanks!!