Tilted Turbo
#1
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Tilted Turbo
Ok, i have searched and found nothing regarding this, and i dont remember reading anything in maximum boost about it... Im doing a DIY, and designing my manifold right now, and i noticed that i could make things fit better by tilting the turbo turbine side down about 15 degrees from horizontal. Has anyone ever seen or done this, or know if it would hurt anything??
#6
I've seen this done before to allow more clearance for a 3" downpipe. I don't recall what turbo it was or what kind of affect it had on durability. Given Bell's comment on your m.n thread about turbo seal geometry being a factor I'd call the manufacturer and ask. More than likely they will shrug you off, but it's always worth a shot.
#9
You need to watch the oil drain out of turbo if you think the pressure has that much to do with the dispersion. What's moving the oil around is the shaft/bearing spinning. My concern is removing the "used" oil. Placing the center vertical guarantees that the gravity is working 100% towards oil drainage. I have never seen turbo mounted fore/aft in an OE application. Nor have I seen a center section feed anywhere but from the top and drain anywhere from the bottom. I can only assume that the reason for this is the nature of oiling the turbo bearings. I took apart a turbo center section and didn't see any room for spraying of the oil.
#10
Ok M2cupcar, I didn't really mean spray, sorry next time ill be extra clear. The point was that the journal doesnt sit in oil. And the pressure has everything to do with getting to the journal. And that you can if you want have a turbo completely upside down. And instead of guessting just use the law of signs to figure it out. at 15 degrees you would have 96% the force of gravity. (that doesnt sound right, but thats what the calculator gives)
#12
I agree 15* from vertical is negligible and the pressure is for delivering the oil.
What I should have said is that mounting the center section other than vertical is less than ideal. The typical automotive turbo is designed to mounted vertically so the oil spends a minimum about of time in the turbo. The t3 center section I took apart had a good taper at the rear of the oil exit but the front wasn't nearly as slanted. In THIS case it would have actually helped oil drain. But if tilted the other way (turbine up) I think it would have cause some pooling just prior to the exit. My guess is the internal architecture of an individual turbo would dictate its tolerance towards what and how much tilting of the assmebly and center section. I'd try and look inside the oil exit to see how it's formed to make a decision. I bet Caterpillar did. - rob
And I still wouldn't mount a turbo upside down.
What I should have said is that mounting the center section other than vertical is less than ideal. The typical automotive turbo is designed to mounted vertically so the oil spends a minimum about of time in the turbo. The t3 center section I took apart had a good taper at the rear of the oil exit but the front wasn't nearly as slanted. In THIS case it would have actually helped oil drain. But if tilted the other way (turbine up) I think it would have cause some pooling just prior to the exit. My guess is the internal architecture of an individual turbo would dictate its tolerance towards what and how much tilting of the assmebly and center section. I'd try and look inside the oil exit to see how it's formed to make a decision. I bet Caterpillar did. - rob
And I still wouldn't mount a turbo upside down.
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