Missed that earlier.

Can you clerify the bold statements? You say you had no flow and then you have flow? What was the difference between the two scenarios, the 90?

Also I have always pulled from a low pressure source to feed a turbo, becasue of the isssue of blowin seal.

One more question if I may, do the returns from each turbo merge, or do they have their own return fitting on the oil pan?

With the speeds that a tubine spins, even at idle, that friction with no oil can burn up the seals real quick.

I was looking at the motor on your website, man that is sick. It looked like both oil returns were clocked to about the 4 or 5 position, is that correct?

yeah, but disconnecting the line at the pan did not stop the smoke. Or do you mena a larger drain line? Thing is 5/8" i.d. is plenty big according to pretty much everyone. That's what was on here with the old motor too I believe.

Jody

No flow was the return line disconnected at the pan, no flow from the pan fitting. That means the fitting is not below the oil level in the pan, and there isn't any pressure inside at idle from whipping oil, as nothing came out of the fitting, I did not cap it.

The flow that surprised was the actual drain line off the turbo emptying into a bucket; quite a bit more oil than I expected to see.

Oil lines are separate, one into the front side of the pan, one at each side. The passenger side drain line is clocked at about 7:30-8 o'clock, the drivers side is between 5 and 6, more vertical.

I do not know of a low pressure area to pull the oil from; this is a fitting on the oil pan provided by ATS for an oil feed or pressure gauge.



Jody

I use a single -16 (3/4") when i test fired my motor and had no oil problems but your running a small frame turbo and im running a large frame. so there is some differences

If it were me id up grade to a larger line.

Oh BTW jody i went and picked up the paint!

cool.......... :thumbsup: Orange???

Jody

Jody don't worry about the pressure going into the turbo. Lots of cars out there with way more than 35psi of oil pressure into the turbo. What sucks is that you need a 90 to drain of the turbo. I bet it you can get that as straight as possible the smoke will go away. Glad to hear the motor isn't the problem! :thumbsup:

So when do we get to see video of the beast on the road???

If it was a drainage problem then I would think it would smoke while driving not at idle. Also both sides would smoke because they have the same drain size. I bet if you rotate that turbo to match the non problematic side it fixes your problem. No turbo expert but that side works and everything else is the same.

yep :)

Did you catch my fuel preasure regulator suggestion as a tempory test for adjusting oil feed preasure/flow?

If repositioning the drain fitting to make the angle the same is resonably easy I would go there first. But the assumtion that is still bothering me is the Turbo having a fresh seal. It took FOUR prochargers on one of the projects I was building at Hot Rod Garage before we got a low boost/noise problem fixed. They repaired 3 of them and we finally told them we wanted a new unit because that is what the customer purchased and no more repaired units. That fixed it. If it failed ounce and there wasn't a completely obvious problem they still may not have found the original issue i.e. something machined wrong or some run out issue. I have fought this more than once.

Can you put a temporary drain hose with a rubber line and staight fitting in place of the 90 fitting as a test?

If you can't come up with a regulator can you put a smaller orfice in place to reduce the flow to the turbo?

It may be a combination issue, marginally high flow, marginal drain fitting/angle, and marginal turbo seal.

IMO just food for thought.

good thoughts. I already re-clocked the turbo. Just have to add coolant and attach the lower drain fitting and it's done. I'll let you know how it goes................. :)