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With the electrical valve option the Accusump’s valve will automatically close when switched power is cut. With the optional switch we can turn the Accusump off entirely if we choose. We’d use this if we were ever parked with the engine off but the ignition switched on—a condition that would trigger the Accusump to discharge, filling our oil pan with 3 extra quarts of oil and leaving us without pre-oiling oil the next time we start-up. One end of the red wires on the switch is hooked up to a switched +12V power source, the other end goes to one side of the electric valve on the Accusump.
We put some high-density weave cable sleeves over the wire and ran it through a hole in the trunk floor that was directly above the electric valve on the Accusump.
The red power wire from the switch is connected to one side of the pressure sensor. The other side is connected to one of the wires coming off the electric valve. The other wire off the electric valve is grounded and that’s all there is to it. Disregard the plumbing, you’re not sposed to know about that for a couple of pages!Oil Cooler & Plumbing
Accusump recommend -10 AN size hose be used with their 3 quart units. As we mentioned before we also wanted to add an oil cooler to our system. For both, we turned to Earl’s. We did a little forum browsing and found that a 25-row oil cooler fits nicely in the front corner of the FD RX-7 in the same spot where the oil coolers from the rotary power plant used to live.
Earl’s 25-row Temp-a-Cure oil cooler is made from thin aluminum corrugated screen internal turbulator plates joined using the latest in vacuum brazing technology (which I believe is just the long way to say it’s a “stacked plate” design). Also worthy of mention, notice the aluminum straps of metal running down the sides of the cooler. Oil coolers of yore didn’t have these and it wasn’t unheard of for the cooler to accordion out and burst from the pressure so you’d have to run long rods with screws the height of the cooler to ensure they stayed together. Not sure why no one thought of this sooner but there’s one less thing to worry about.
The cooler’s inlet and outlets are -10 AN female O-ring bosses.
