I decided to try out the Rotary aviation oil metering pump adapter on my '89T2, and this writeup describes the installation. The RA adapter fits between the stock MOP and the front cover, blocks off the supply of engine sump oil to the MOP, while allowing you to route a supply of 2-stroke oil into the MOP instead. You need to supply a tank for that, that needs to be installed at least 6 inches higher than the MOP for it to gravity feed.
Here's a picture of the contents of the RA kit. Since my S5 uses the electronic MOP, I ordered the "13B Electronic MOP" adapter model.
Next thing I needed was a tank for the 2-stroke oil. Found a 1.5 Quart tank at US Plastics. This one is chemically compatible with the oil, is translucent, and comes with a barbed nipple on the bottom for 1/4" hose and a vented cap. Cost a little more than $20 shipped. Since I no longer run an air pump, I used that space for the tank install. Here's a picture of the tank, and the bracket I fabricated out of some 1/8" thick AL stock.
You would think this should be a simple & painless install, but I ran into one PITA problem - the turbo oil return pipe interferes with the MOP once the RA adapter is sandwiched between it and the front cover. So if you have an NA, this job should be much easier! This pre-installation photo shows the lack of space between the turbo oil return pipe and the MOP
With the turbo oil return pipe removed, I was able to install the RA adapter with the stock MOP. You'll need to be very careful that you don't kink & break the oil lines, and a little bending of the metal line guide/bracket is necessary to ensure the lines don't rub/interfere with anything. Fortunately, my stock lines were relatively new and had enough slack and pliability to do the job. This picture shows the mounted RA adapter & MOP. Note the barbed fitting on the adapter, that's where the line from the tank gets connected to.
Part II will show the tank install. Then I'll need to find some flange-to-AN fitting adapters to fabricate a new oil return pipe for the turbo. I figure a -10 should do the trick. That will be Part III
