RA OMP adapter install on a S5 T2 writeup

[Pete_89T2]

Originally Posted by JustJeff

Nice!! I thought about doing an adapter during my rebuild but decided I had enough on my hands getting the car off jack stands.

I love the mod but after seeing your thread I'm glad I didn't. I don't have the tools to mod the oil line from the front cover. But who knows, maybe after seeing your work I'll learn enough to do it...somewhere down the road...if I can ever get my car off the jack stands and back on the road.

Thanks - and don't let the turbo oil return line discourage you. After work today, I decided to get under the car again and do a test fit of the stock turbo oil return plumbing (without gaskets) just to verify that it wouldn't fit back on before ordering parts to fabricate a custom line.

As it turns out, I'm happy to report I was premature in thinking there would be interference. The stock return pipe barely clears the RA adapter, MOP and all lines with maybe 3/16"~1/4" space between the pipe flange at the closest point. You'll need to carefully route your premix line from the tank to the RA adapter to make sure engine vibration doesn't cause it to rub against anything, but this is easily do-able with some strategically placed zip ties.

You definitely need to remove the stock oil return pipe to give yourself enough room to install the RA adapter & MOP as an assembly. I also found it helpful to remove the stock M-fan. You can get by without removing it if you have smaller hands and/or better dexterity than I. Another caveat to add is to ignore the line in RA's instruction sheet that says not to remove the oil injector lines from the MOP. I started trying it that way, and soon found that the job was impossible with the lines attached.

When I have time to reinstall the oil return pipe properly this weekend, I'll take some pictures & finish the writeup.