BC704-H Inverted Oil Pickup (4-Cylinder Lycoming)
The VAC-2 provides a direct replacement for the Lycoming vacuum pump pad adapter. Precision CNC machined from solid billet aluminum, its unique design offers both a standard vacuum pump pad adapter AND provision for inverted oil pickup. The vacuum pump pad is often used for one of our spline-driven alternators, such as the SD8 or SD20.
Aircraft with oil systems using the standard "T" fitting on the firewall will typically experience a 3 to 5 second drop into the yellow oil pressure range after rolling inverted. However with the VAC-2 installed, the oil pressure will have a momentary blip or wiggle on the oil pressure gauge as the ball valve switches ends. As a result, the engine receives better lubrication and prop surges are lessened.
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