What's up everyone I have a 351w with a holley 600 cfm 4 barrel with vacuum secondaries and the secondaries are opening too early. Is getting a spring kit the only way to adjust when they open? Any answer would be appreciated.
Thanks
yes the only way to tune the opening rate and timing is by changing the secondary spring. holley has such a kit available with a variety of springs in various colors, along with which color springs are doing what. you need a stiffer spring.