if you draw a line through the centre of the bearings in the turbo, does it matter if this line is not horizontal

i have had a few people say to me that if the turbos central axis is not orizontal it will destroy the bearing quickly - we were talking more specifically about journal bearings, they said that the oil would pond and the lower end and the higher bearing would sieze

im thinking BS, but anyone heard anymore about this, many of you guys build manifolds, where the turbo is on an angle???

 

The turbo is fed by pressurized oil, I don't think it would matter, as long as the oil can drain back to the engine properly.

 

i'm pretty sure the center section can take a little bit of an angle and still work fine



Modified by Vince64 at 1:27 AM 4/24/2008

 

the fullrace manifold for the k20 tilts the turbo up at an angle. i dont see a problem with it

 

It shouldn't cause turbo failure, but the thing will dump oil into the exhaust housing and smoke like hell if left at idle for any length of time..

 

It needs to be level. That is what has been recommended by all of the manufacturers that i have seen.

 

I believe I remember hearing/reading they recommend no more than 15 degrees from level in either direction.

 

every factory setup ive seen the drain goes straight down... no tilting

 

they will work at an angle, but im pretty sure its hard on the thrust bearing.

 

I've seen recommendations calling for no more than 30*, and I had around 15* on my last car. Granted it only ran 2000 miles, it was a used turbo, and was no worse for wear afterwards. I did have a .060" restrictor on it though. The only problems angle could cause is a slight amount of sideload, meaning wearing the thrust bearing a tad more. But with the comrpessor side up, it would probably balance out any forces from the turbine pushing and comp pulling from the chra due to airflow.

BTW I wouldn't look at factory setups to be gospel. If we took a hint from Volvo, we'd have tiny exhausts, and probably a GT17-size turbo on our 1.8L's... Of course they put them straight, the design it into the engine & bay to be optimized for longevity. Most motors/setups here won't see the 100K they expect from factory turbos (yet rarely get anyways).

 

subscribed... I have built two setups with angles on the turbo..

Heres mine

 

i'm almost positive they don't mean an angled turbo like yours which is side to side. They are talking about turbo's that position the exhaust housing to lean back or oil drains that don't drain because they are clocked.

 

my turbo is clocked at a wild angle, look at it.. I'm not talking about side to side, look were the oil inlet is ..

 

thats fine. they are talking about shaft being at an angle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by L_J_Scheepers &raquo;</TD></TR><TR><TD CLASS="quote">if you draw a line through the centre of the bearings in the turbo, does it matter if this line is not horizontal

i have had a few people say to me that if the turbos central axis is not orizontal it will destroy the bearing quickly - we were talking more specifically about journal bearings, they said that the oil would pond and the lower end and the higher bearing would sieze
</TD></TR></TABLE>

Uh yeah, if you have the bearing housing horizontal you will destroy the bearings. Vertical however...

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boosted_B_Series &raquo;</TD></TR><TR><TD CLASS="quote">subscribed... I have built two setups with angles on the turbo..

Heres mine
</TD></TR></TABLE>

You know... I'm looking at that picture and I just can't figure out why you wouldn't just have the bearing section completely vertical...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Garage 808 Hatch &raquo;</TD></TR><TR><TD CLASS="quote">thats fine. they are talking about shaft being at an angle. </TD></TR></TABLE>

Ohhhhh, I get it now.

Well, as they say, gravity is a bitch.

 

I think the OP was talking about the shaft axis [angle], not the axis between oil inlet/outlet. I know for certain that you want 15* from vertical (either way) at the most for the oil inlet/outlet axis. That looks like 40* from vertical on that topmount.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HiProfile &raquo;</TD></TR><TR><TD CLASS="quote">I think the OP was talking about the shaft axis [angle], not the axis between oil inlet/outlet. I know for certain that you want 15* from vertical (either way) at the most for the oil inlet/outlet axis. That looks like 40* from vertical on that topmount.</TD></TR></TABLE>

Yeah, I realized that right after I posted what I did, hence the double post.

 

Come on guys... how is a 45* angle any different than 1g force in any direction?

The F1 buggies put a lot more than that on them...

Point is, NO, it does not matter.