madvette74

i hace a holey 700 duel feed, it idles at 12-13hg and when i am steady driving around 15-20 if memory serves me correctly.. what power valve size should i use? what is your vacume readings and what are you currently using??

dman535

Are you trying to correct a driveabilty problem ? if the car is behaving properly I would not change what you have.

madvette74

i agree, just leave it alone, it's just when you read a carb book and it say's how to select the correct power valve or even the correct carb size, you got to wonder just how much better would it run, if i was to experiment with this.. the carb is a crucial part, that needs attention, just want to highlight this part more in depth

Jvette73

This article I linked below has good tuning tips for Holley carbs. They do discuss the selection of power valve too.
http://www.mortec.com/carbtip1.htm

madvette74

thank you, thats just the information i was lookking for :party: