Fully Built 1995 TT6
So oil feed needs to be as close to vertical/12oclock as possible and return 6pm?In the picture below, you will see my engine bay shortly after it was put together initially. If you'll notice, the turbo's center section is clocked in such a way that the oil feed / drain ports are about 40° from vertical By vertical, I mean your oil feed would be the highest point on the turbo's center section. If you have it this far off vertical, the oil pools at the bottom of the turbo, because it is gravity drained.
This causes a LOT of smoke, enough that it might make you think your car is on fire. Not very fun when you've invested a stupid amount of money into a car, for it to look like it's on fire whenever you roll to a stop...
Now, depending on your manifold design, you might be in for a good time, trying to get the oil feed close to vertical. Personally, I wouldn't go more than 20° from vertical, if at all possible. Get creative, but also realize that you need to deal with extreme heat in that region. Careful hose routing (try to keep the drain hose as vertical as possible too, because, again, gravity is all you get to drain the oil out of the turbo) will keep MOT folks happy, hopefully. More hopefully, you won't run the risk of burning through an oil drain hose and err... having a source of hot oil exposed to a super hot manifold, which... I shouldn't need to elaborate, but that's a bad situation.
View attachment 257274
Water feed 3pm and 9pm?
I will make sure the lines as are far from heat as possible and will also use heat jackets for the hoses.