Most of the turbo cars I see have the turbo(s) mounted with the shaft running front to back on the car.

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A few have the turbos mounted with the shaft going side to side.

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But almost all have the shaft parallel to the ground. Is this a requirement? Will there be more bearing wear or drag on the turbo if mounted at a 45 degree slope? I found one pic of a car mounted the way I would like to go. However I have no info on how well it worked. .

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What are the pros/cons for the side to side or front to back installations? Any detrimental effects from mounting on an angle?

Scott

 

love a Symetrical design. That last one with the 45 degree angles looks sweet as hell. Not an answer to your question but I enjoy the pics.

 

I know you want the drains as level and flow through as possible so that is why you see them like the first two pics, the 45 degree would not allow you to have the feed and return/drain tangent to the ground.

 

I've heard the rule of thumb for turbo shafts is that if you must mount it tilted, no more than 10 degrees off horizontal. 45 degrees is probably going to drain the oil into the exhaust or intake.

Front to back vs side to side is primarily a packaging consideration.

 

Might be able to get away with this with a scav pump rather than gravity drain

 

I was told no more than 15 degrees rotation by turbonetics.

http://www.turboneticsinc.com/install_instructions

 

I cant believe the car in the third pic would be running those filters .

 

I believe that is the same guy that built the Cadillac XLR outlaw 10.5. It had tilted turbos too. I am guessing the filters are just covers to keep thing out of them since they face up. I doubt the car was ever ran with them on.

 

I thought that too , but it almost looks like they have been sucked in some . Maybe some street driving .

 

OK - They indicate the drain should not be more than 15 degrees, but I don't see anything about shaft orientation.

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It would be possible to have the drain pointed down while having the turbo tilted.

FYI - I am using 4202 turbos.

Thanks
Scott

 

The last pic would probably be ok if the car saw little or no street time. Oil is going to get past the seals but that wouldn't be as much of an issue with a track car. However, I would think it could make it a bit more difficult to tune.

 

This is what I have been told.

 

How do you figure? Any change you do in the angle of the shaft is going to alter the angle of the drain because they're both part of the CHRA.

 

mounting the turbo front to back, side to side, or diagonally in regards to which way the car is facing doesnt matter, it needs to be almost horizontal though. Holset says not to incline the turbo. If it has to be, then mount the oil inlet within +/- 10 degrees from vertical, and rotor centerline must be +/- 5 degrees from vertical.
http://issuu.com/dieselusa/docs/hol...issuu.com/v/light/layout.xml&showFlipBtn=true
page 1:4, installation data has all kinds of useful info

 

That is what I was afraid of. I have already cut the front frame rail, moved it out 3" and up 1" which moved the suspension forward and dropped the body an 1". I am hoping to gain enough extra room to allow for turbo placement behind the front tires and a downpipe that is not radius-ed too tight off the turbo. To compensate I also had to move the front wheel lip forward to match the new suspension center-line.

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