Many late-models develop oil control issues with their PCV systems, but fortunately, there’s an easy remedy for this problem. From the factory, excess crankcase vapor and residual oil are vented back into the intake manifold. This is compounded by today’s ethanol-enriched fuels. The oil mist can cause detonation, and leaves deposits on the intake tract and the valves. To fix this issue, Moroso has developed air-oil separators that plumb into the PCV system and capture this oil mist. The oil mist enters the separator, where the oil sinks to the bottom and the rest of the gases are plumbed back into the intake. The oil can then be drained from the separator as necessary. Some of these air-oil separators are generic, but Moroso now offers vehicle-specific kits for cars like the fifth-gen Camaro. They are available in two sizes and feature billet aluminum bodies, stainless steel mounting brackets, inlet and outlet fittings, and high-quality rubber hose for plumbing it into the PCV system.
For cars with wet sump oiling systems, adding an oil accumulator is a great way to reduce the potential for oil starvation. An accumulator is essentially a hydraulic cylinder with billet aluminum endcaps that stores oil under pressure. It releases an instantaneous supply of oil when the oil pressure drops below a safe level, and it can also be used to pre-lube the engine before startup. The accumulator can be tapped into the return line of an oil cooler, directly into the oil valley in the block, or through a sandwich adapter that mounts between the spin-on oil filter and the block. When the engine is running, oil pressure forces a supply of reserve oil into the accumulator and compresses the air ahead of it inside the hydraulic cylinder. If the engine’s oil pressure should suddenly drop because of hard acceleration, severe cornering, or hard braking, the air pressure immediately sends oil out of the accumulator and into the main galleries. When the severe conditions subside and the oil pump is once again primed, the oil pressure forces oil back into the accumulator where it is ready for the next potential emergency.
For an accumulator to function properly, it needs a valve assembly so each Moroso accumulator comes with a manual ball valve. The valve has to be manually opened by hand before starting the car to pre-lube the engine and manually closed before turning the engine off. As an option, Moroso offers solenoid pressure valve kits in oil pressure ranges of 15-24, 35-40, and 55-60 psi. These kits release just enough oil to prevent starvation, which allows for quicker filling and discharging. They work very well in remote mount situations where accessing a manual valve is not an option.
Drag Race Accumulators
Accumulators aren’t just for road racing. They are very effective in drag racing applications as well. Many independent tests have shown that over 85 percent of engine wear is caused by starting an engine, and these dry starts cause premature engine wear. An accumulator is beneficial for pre-lubing the engine before start-up, especially since drag cars tend to sit for a long time between races and between rounds. Also, during hard acceleration, an accumulator helps guard against oil pressure fluctuations. For drag cars that accelerate very hard, the oil can rush to the front of the pan during shut down or if the driver needs to brake. Accumulators provide a safeguard of oil in reserve during these situations. Drag racers have also used accumulators to free up horsepower by running less oil in the oil pan, or using them in classes that have oil pan design limitations. CHP