[JFP in PA]

Yes, but as I noted earlier, the exact placement of the venturi style vacuum generation devices is critical to their performance; the angle of the exhaust flow to the device and its placement in relation to the collector system on the car’s exhaust headers makes it a difficult installation in tight confines, even on a race car. Add to that the fact that inherent low vacuum signal at lower RPM’s from a venturi system tends to cause plug fouling due to poor ring sealing at lower RPM, and even racecars started using alternative vacuum sources like pumps to provide predictable and consistent levels of vacuum across the entire RPM range.