Concerns about high oil pressures with BS removal

[DSM_NOOBIE]

I was reading on the block and head section that the BS removal kit increased the oil pressure dramatically in the 100psi range. I'm in the process of putting my motor together and I dont want to take it apart anytime soon. From my understanding turbos dont like extreme oil pressures such as 100psi. So this issue concerns me. Is there any way to aleaviate the pressure? I'm thinking about using one bearing instead of two? Do you think this is okay to do?

 

[oldman]

http://www.dsmtuners.com/forums/showthread.php?t=224606

 

[Quasimondo]

The bypass port on the back side of the oil filter housing needs to be enlarged.

See pics here:
http://www.utdsm.org/gallery/view_album.php?set_albumName=album12

See thread here:
http://www.dsmtuners.com/forums/showpost.php?p=1577237&postcount=2

 

[DSM_NOOBIE]

Thanks, I did read that thread also but that involves porting the oil housing which could be easily be solved by opening one of the bearings.....I'm just trying to determine the easiest but yet still effective way to drop the oil pressure down without having to go through too much work.So would you say not installing that last bearing in or having to spend time porting material away is the way to do this

 

[oldman]

If you're going to do that, leave the front shaft in it's place without the belt. Leaving one of the bearing open will result in too low of oil pressure which is more of a problem than excessive pressure.

 

[DSM_NOOBIE]

ahhhhh I see, thats the answer I was looking for thank you oldman I guess porting the housing is my only choice. thanks again

 

[nightspeed87]

so removing the balance shafts you say gives you too much pressure? What are ill effects of too much pressure?

 

[oldman]

ahhhhh I see, thats the answer I was looking for thank you oldman I guess porting the housing is my only choice. thanks again

No problem, make sure you port it like the picture on the left out of the 3 in the above link. With the motor out, this port job should take no more than 20 mins.

 

[Quasimondo]

Thanks, I did read that thread also but that involves porting the oil housing which could be easily be solved by opening one of the bearings.....I'm just trying to determine the easiest but yet still effective way to drop the oil pressure down without having to go through too much work.So would you say not installing that last bearing in or having to spend time porting material away is the way to do this

That is so not recommended. Your oil pressure will be way too low at idle and your engine will live a short existence.

The oil filter housing is made of aluminum, so there's no need for a carbide bit or powerful air grinder to port it out. A dremel will do the job just as well.

 

[oldman]

Hey Mondo, didn't see you at E-town this weekend.

 

[GVR4592]

http://www.dsmtuners.com/forums/showthread.php?t=224606

http://www.dsmtuners.com/forums/showthread.php?t=222778

http://www.dsmtuners.com/forums/showthread.php?t=236201

Those are just from the last month, maybe these should get deleted or merged.

 

[DSM_NOOBIE]

so removing the balance shafts you say gives you too much pressure? What are ill effects of too much pressure?

With excessive amounts of oil pressure such as 100psi flowing through the turbo, the oil will apply great force on the seals blowing them and making its way out into your compressor housing and turbine housing...

 

[perley03]

With excessive amounts of oil pressure such as 100psi flowing through the turbo, the oil will apply great force on the seals blowing them and making its way out into your compressor housing and turbine housing...

Actually, turbos essentially have no "seals", or seals that you are thinking of. They are basically two c clips, and when the shaft is spinning, the force of the shaft spinning (centrifugal force) and the force applied on the "seal" keeps the oil from exiting the housing, either into the turbine side or compressor side. When you overcome this force, its when you will start to see blowby, or excess oil created by force (oil pressure). That is why when you have a turbo just sitting, and you pour oil into the cartridge, it will flow out to either the turbine or compressor side, or both. I highly doubt you will see 100psi of oil from the head. Most turbos only run between 30-40 psi anyway before you see blowby. I've seen some racers put a restriction, or valve, before the turbo on the oil supply line, to limit the flow of oil to the turbo. Its not about pressure either, but mostly volume too.
Just thought i'd throw that in incase you didn't know that turbo's don't have "seals" like most people think.