Gold Oil System
An exploded view of the complete Gold Oil System Assembly.
I can honestly say that I've done more testing on the Corvair's oil system than any other person alive. Using the Google [TM]
search box on the bottom of our FlyCorvair.com Home Page, you scan through 10 years of photos of tests run
with our purpose built test rig, Dynomometer and dozens of Flying Planes. You can
see Corvair coolers packed in ice, aircraft running at a 22 degree angle of attack, 30 oil pumps being rebuilt and tested in our
hangar at a whack, and many other photos documenting our extensive work. You'll find an excellent primer on the Corvair's oil system
in my Sunday Papers On Oil Systems.
The Gold Oil System is the ultimate flight proven system for the Corvair. We've been making them for more than a year, they've
been fitted to dozens of airplanes, and they're flying across the country. The new 701 has one, as does
Gordon Alexander's PegVair N129LZ, Steve Makish's KR-2 N841SM, and
Murray Rouse's ZenVair 601 N47186. It's an elegantly simple system that serves many airframes.
Pictured left to right on top above: A K&N HP 1008 oil filter with internal bypass; custom CNC made, nickel plated through bolt ($39);
Oil Cooler Sandwich Adapter with internal bypass ($119 complete with fittings); and Gold Oil Filter Housing ($239).
Below are two 90 degree full flow hose ends. These attach to the bypass and would lead directly to the oil
cooler. To the right of the hose ends is a CNC fabricated aluminum plate we use to block off the stock oil cooler location.
Above is a front and back view of our Gold CNC Sandwich Adapter. The black square O-ring sits in a deep machined groove.
It's from an off-the-shelf oil filter. The three small pieces at left above form the oil cooler bypass inside the Gold Sandwich
Adapter. In the development of this part, the spring was by far the most difficult piece to get right. It must unseat the check
ball at exactly 7 psi. The ball has a small fraction of a square inch of area, and the spring is made to exacting standards for us by
a company that manufactures certified springs for aerospace applications. A very small bag of these springs costs several hundred dollars.
We do not make things that are "good enough"; we make things that are right.
Three views of Gold Oil Filter Housing.
While small enough to hold in your hand, this CNC housing consumed an enormous amount of developmental work 18 months ago. A
close look reveals diagonally bored oil passages that required a 5-axis CNC mill to produce the part. The 1/2" NPT port accepts
all temperature senders and the dual 1/8" NPT ports cover pressure and switches. This Gold Oil System bolts directly in place of
the stock Corvair oil system and requires no machining. It is designed to work with our other Flight
Every now and then, someone on the Internet crops up with the idea of making an adapter to remote the oil cooler from the stock
oil cooler mounting location. We tested this idea many years ago. I retrieved these pieces from the bottom of our Old Idea Bin.
Ten years ago, I had an oil system on our Corvair Powered Pietenpol that worked from the stock oil cooler
mounting points. My Sunday Papers Oil System article explains the downsides of remoting the cooler from this location.
One negative aspect which I haven't previously covered is the excessive amount of internal 90 degree turns inside the engine. The stock
Chevrolet system obviously worked in the car, and we've certainly flown them for many years. But a high performance oil system is
handicapped by requiring the oil to flow through the restrictive passageways.
Additionally, any system directly running a cooler from the stock location requires the use of the stock Chevy cooler bypass
in the Rear Oil Accessory Case. After having personally built and tested more than 150 Rear Oil Covers, I can attest to the fact that
many of these bypasses bleed down or have weak springs. This observation sent me in pursuit of the Gold Oil System with its
brand new, all-metal bypass. When the Gold Oil System is installed, the GM bypass is removed and a greatly streamlined oil system with
all new bypasses allows the system to function at the peak of efficiency. This last point is not a small one, nor a marketing ploy.
Notably, Mark Langford, who runs an entirely different oil system applicable to his rear starter setup, recognized this improvement and
integrated it into his own aircraft.
When Grace completes her January 2008 organization and shipping automation, we will have a Products Page for the Gold Oil System,
as well as all Manuals, DVDs and Class A Availability Products ordered after her Dec. 23, 2007 holiday shipping cutoff date sent
out via U.S. Postal Service Priority Mail. For those who want to get their Gold Oil System orders in before the rush, please send a check payable to
William Wynne, 5000-18 HWY 17 #247, Orange Park, FL 32003.
On Deck: Oil Pans And Starter Brackets
Builders awaiting an Oil Pan or Starter Brackets from us, take heart: I have made a long awaited breakthrough in Oil Pan manufacturing with a
large CNC manufacturing house. Whereas they were previously a weldement that took many, many long hours per Oil Pan, they are now being fabricated by an
entirely different process. With a phone call, I will be able to order more Oil Pans than I could make in a month. The new Oil Pans will be
approximately 8 ounces heavier than our Flight Light Welded Pans. I'm still willing to make welded pans for anyone with good reason trying to break the record on the
lightest Corvair engine ever. We're about three weeks away from the first delivery of Oil Pans.
Over the years, I've made several hundred sets of welded Low Profile Front Starter Brackets. I'm now transitioning them to a CNC parts set.
They're actually slightly lighter in aluminum than steel. We will fill backorders with these upgraded parts after they are here and flight tested.
Distributor bodies are our next order of business.
Builders can be confident that we're reinvesting heavily in the Corvair to eliminate back orders and improve the quality and availability of all the parts in
Our Catalog. Again we thank builders for their patience.
2008 Aviation Events Of Interest
Please e-mail your local av event info with
"Event" in the subject line
and check this page throughout 2008 for additions
LSA Expo Sebring, Fla., Jan. 17-20, 2008
Sun íN Fun, Lakeland, Fla., April 8-13, www.sun-n-fun.org
EAA AirVenture Oshkosh, Wisc., July 28-Aug. 3, www.eaa.org
Wheels and Wings Annual Airplane and Car show in conjuction with the County Fair, Osceola, Wisc., Sept. 6
KR Gathering 2008, Sept. 19-20, Mt. Vernon, Illinois, www.krnet.org
Winter Break: TBA in 2008 at www.FlyCorvair.com/hangar.html
Now At The Hangar
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OSH, Illinois and SAA June 13, 2005
At The Hangar June 13, 2005 Part II
At The Hangar In May 2005
At The Hangar In April 2005