William Wynne

"The Corvair Authority"

Gold Oil System

The Gold Oil System represents the ultimate evolution of my 20 years working with the Corvair engine's oil system. It is an extremely well thought out flight proven ystem with great consideration given to installation and operational parameters. It is appropriate for any Corvair powered aircraft. The components of the system are manufactured on supremely accurate CNC equipment. The system is an excellent value, but not inexpensive. Through my Manuals, Web site and telephone, I'm still willing to share our decades of experience on less costly systems we have flight proven. Our Web site outlines some of these in our Sunday Papers on 6 Oil Systems That Work. After careful consideration, the majority of our builders are going with the Gold Oil System. While some applications, like the 701, simply cannot be built to our specifications without it, it remains the option of choice on most other Corvair powered applications. The basic system is built on the Gold Oil Filter Housing. The Gold Sandwich Adapter and Niagara Cooler are selected by most builders, but are truly options that can be added later to the aircraft. Because of the Gold Oil System's sophistication, some builders assume I'm moving away from being a champion of low cost engines. On the contrary, my goal always has been larger than teaching people how to build economic engines. My real task is to have builders successfully operate them after building them with the same reliability and performance we've always gotten out of our own engine installations. If you're just getting started on your Corvair engine, picture yourself looking back from your future vantage point as a successful builder flying your completed aircraft, with the ease of installation and conistent known performance of these systems that makes their value readily apparent.

Above are three views of the Gold Oil Filter Housing. This housing bolts in place of the stock GM oil filter housing on your rear accessory case. It is precision machined to exacting tolerances and bolts right on any rear case in 5 minutes. It is designed to accept the highly efficient and extremely light K&N 1008 Oil Filter. This oil filter is readily available at auto parts stores, and features an internal bypass and an aircraft style safety wirable nut. The housing has three ports. The largest is a 1/2" NPT port to handle standard mechanical temperature senders. This port is located at the highest point of oil temp in the engine. Sensing the temp in the pressure oil stream ahead of the cooler reliably and accurately gives us temperature information. Any builder using this housing can relay his temp info to us and we'll be able to accurately assess this information. Also machined are two 1/8" NPT pressure ports. These measure pressure at one of the lowest spots in the engine, again giving consistent and accurate information that can be compared with our known parameters.

On installations utilizing electric fuel pumps, one of the ports will operate the Nason safety switch. These ports also make excellent feed locations for external oil lines to turbos or Fifth Bearings. The housing works with all of our Baffle Kits, coolers and Cowling Kits. The housing can be utilized on engines with stock 12-plate or folded fin coolers. In the first six months of testing, we flew the housing on 601s, the 701, the PegVair, KRs and a Pietenpol. The housing comes with the mounting hardware and installation instructions included. We've personally mounted it on dozens of engines, many of which we ran on the dyno. Photos can be seen on many of the Hangar Updates on this Web site. The only Corvair powered aircraft that would have difficulty using this part is a Cleanex, due to the location of its fuel filler neck.

You may order this item at shop.flycorvair.com/shop

Above are two views of the optional Gold HP Oil Cooler Bypass. It is often referred to as a Sandwich Adapter because when installed, it's sandwiched between the Gold Oil Filter Housing and the oil filter. It's held in place by a very accurately machined, nickel plated hollow mounting bolt. It can be installed on the Gold Oil Filter Housing in literally one minute. It includes a square o-ring gasket, held in place in a deep recess. The AN-6 fittings for the lines to and from the cooler can be clocked in any position. It contains an all metal cooler bypass featuring a precision spring manufactured by the nation's foremost supplier of aerospace springs. On a normal start cycle, the cool oil in the cooler will produce a pressure drop in excess of 7 psi. Any time this is so, this bypass valve senses the pressure differential and allows the oil to bypass the cooler, greatly speeding up the elapsed time until the oil reaches 150F.

I carefully selected the size of the bypass and rate of the spring to match the internal drag of the coolers I recommend. My Web site shows photos of oil tests we conducted going back more than 10 years. A mismatched bypass will allow the engine to run either hot or excessively cool oil temperatures. Engines with excessively stiff springs can easily starve a cold engine for oil and produce damaged #5 and #6 rod bearings. I've seen oil systems proposed by people who have no appreciation of how the oil system operates. Our relentless testing and matched components provide flight proven reliability.

The sandwich Adapter is most commonly linked to a Niagara 2002 oil cooler. We have this arrangement flying on dozens of aircraft. For extremely high performance oil cooling, it can be linked to a Niagara 2003 oil cooler. We flew this combination in our 3,100cc 601 and the ZenVair 701. Both of these coolers directly work with the Baffle Kits that we sell. Typically, Corvair powered aircraft with the Gold Oil System and Niagara cooler can be flown at any power setting and any airspeed at gross weight on a 100F day for as long as you like without excessive oil temperature.

The Corvair is known for good cylinder head temperature cooling. With the Gold Oil System and Niagara cooler in place, builders even in the most challenging environments can simply fly the plane and not concern themselves with obsessively monintoring temperatures.
You may order this item at shop.flycorvair.com/shop

By choosing our Gold Oil System, which has hundreds of hours of proven flight time on it and is made of the best materials, you have taken a giant step toward minimizing the risks associated with oil systems. If you have any questions, please e-mail us.

Copyright 2018 William Wynne