Quote Originally Posted by prpmmp View Post
Thanks!! A couple of things(mistakes) I learned when tuning the carbs is to get the primary circuit correct first(jets),I made the mistake of increasing the squirters to get rid of the low end bog(was up to a #37)but when at highway speed it was way to lean(the squirter helps with the transfer from idle circuit to primary circuit)I am down to a # 28 squirter now). Jets-4 jets from summit cost $14+ and holley suggest to jump 2 sizes at a time(that could be alot of jets if you don,t have access to jets)local drag racer gave me his drill set #1-50,told me to drill the jets a thousand,s at a time till I got where I need to be(holley does not recommend drilling jets) You can always buy the correct jets after you dial it in. Hope that makes any sense.A vacumn gauge is a must(lets you know while you are driving when your power valve is opening)You do not want it to be opening while at highway speeds(power valve is to help make the transfer from primary circuit to secondary circuit) spring in vac diaphragm. Pete
Thanks for posting the details, Pete. Makes perfect sense, and drilling out the jets (using a hand pin vise, I assume) seems like the only way to go unless one had access to a full range of "loaner" jets to play with. The vacuum gauge comment is a very good tip for the power valve, too. I like the clarification that the power valve is like the "squirters", but for the primary/secondary transition. Great video, too.