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Oil feed return question for toyota ct20a turbo

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Oil feed return question for toyota ct20a turbo

Old 04-23-2016, 08:08 AM
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Default Oil feed return question for toyota ct20a turbo

Hi everyone!


I am building a turbo kit for d16z6 honda engine and using toyota ct20a turbo and I can't understand how oil feed/return works because both openings are on the same side of the turbo (top in my case). Clocking turbo will not work as oil feed and return holes are on the exhaust hausing side and because of the manifold design it can't be mounted otherwise. Maybe just if reweld the manifold to tilt the turbo..? I understand that in ideal scenario feed should be on top, drain on bottom and gravity does all the work. Will it be ok if oil return will come out on top of the turbo a inch or two and then make a U turn and go down to sump? Or that will create enough backpressure on the drain side to blow oil trough seals?




I don't have a Picture of the turbo, but to get the idea here's the oil feed/return flange



It is a buget build so I am using what turbo I have, not the one that is suited best. The main question I have is in bold. If anyone could answer or coment that, it would be greatly appreciated.
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Old 05-02-2016, 11:30 AM
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The drain oil is more like the stuff that comes out of those new foamy soap dispensers - you must point the drain down. If your manifold does not allow the turbo to be mounted as designed, you've got the wrong turbo for the manifold - or maybe the manifold installed upside down?
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Old 05-03-2016, 02:55 AM
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Thank You for the answer.

Manifold is custom made. I guess it will be no harm if oil feed will come from the bottom so the the drain as well can be on the bottom
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Old 05-03-2016, 11:24 AM
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Yeah, apparently this turbo was designed to have the oil feed come in from underneath. The drain has to point down, but one can design a turbo to have the oil feed side go in from any direction. It's just that having the oil feed on the top is easier to machine.
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Old 05-03-2016, 12:57 PM
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Thanks for the answers. This means only thing left is to create custom bracket for stock wastgate since I had to clock the turbine housing. Even the turbo came dirt cheap I already have put quite a work into it creating custom flanges in CAD for it. So it would be a shame finding that the turbo was no good for my setup
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