It's a rev n nator
They say Q: Do you recommend Vacuum Advance?
A: No We do not recommend vacuum advance, but in some applications it's fine. You need to take the time to make adjustments to your distributor, if needed.
The reason we do not like vacuum advance is because our box has a digital type flywheel built in. This helps smooth out the timing, and it does not like all the movement and "chatter" vacuum advance causes. Some cars may seem to run better with their vacuum advance hooked up because they do not have enough initial timing in their car. If you have a 318 or a low performance motor, it can benefit from vacuum advance at part throttle. However, If you set your timing up with enough initial timing and the correct total timing, your car will run great without VA and get the best gas mileage and performance that can be expected out of these older cars.
Example: How we set up our customers' timing: Approx. 18-22* initial timing and most motors like between 32-38 total, depending on your engine (with no vacuum advance). This is a combination that works well for the R/T Garage as well as many engine builders. Our customers are very happy when we perform this type of tune up or they follow these steps.
