doug1548534725 Posted January 24, 2007 Share Posted January 24, 2007 We're redoing the electrical on the #81 car, and we noticed that there seems to be no vacuum advance hooked up to the distributor. It's a 305 carb camaro. 8.25.4 All other ignition components and parts must be OEM stock or equivalent replacements and remain unaltered. Does that mean we can't unhook the vacuum advance? Would I even want to? What does everyone else do? --Doug Quote Link to comment Share on other sites More sharing options...
Adam Ginsberg Posted January 24, 2007 Share Posted January 24, 2007 Vacuum advance isn't going to do much on a race car. It's primary use is for part-throttle driving...like light traffic. There is no such thing as "light traffic" in CMC. Quote Link to comment Share on other sites More sharing options...
doug1548534725 Posted January 24, 2007 Author Share Posted January 24, 2007 Sounds reasonable. Is this modification explicitly allowed in the rules? Quote Link to comment Share on other sites More sharing options...
Adam Ginsberg Posted January 24, 2007 Share Posted January 24, 2007 FWIW, I have the vac line hooked to my distributor, even tho it doesn't really do anything. Leaving it unhooked from the distributor isn't modifying anything - it's just unhooked...no different than not hooking up various unneeded/unwanted electrical components ( lights, horn, etc ). Be sure to cap off the port on the carb to prevent a vacuum leak. Quote Link to comment Share on other sites More sharing options...
mcmmotorsports1548534724 Posted January 24, 2007 Share Posted January 24, 2007 FWIW, I have the vac line hooked to my distributor, even tho it doesn't really do anything. In the old days, people ran their Nitrous line through vac lines that were "supposedly" not doing anything. jk Quote Link to comment Share on other sites More sharing options...
Members Al F. Posted January 25, 2007 Members Share Posted January 25, 2007 I certainly agree that there is no such thing as light traffic in CMC, but there are one or two situations where part throttle and a light touch are called for, particularly long sweepers like turns 2 and 3 at Thunderhill or the carousel at Infineon. Put the thing on, make sure the motor transitions as smoothly as possible (it is a carb after all! ) Quote Link to comment Share on other sites More sharing options...
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