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Vacuum Advance


doug1548534725

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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

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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.

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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.

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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. hiding.gif

 

 

 

 

 

 

jk

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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! )

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