Author Topic: Holset HX55 turbo.  (Read 11002 times)

0 Members and 1 Guest are viewing this topic.

Offline maj

  • Sr. Member
  • ****
  • Posts: 743
Re: Holset HX55 turbo.
« Reply #15 on: March 13, 2013, 08:08:57 PM »
Don't make your flanges too thin
start with 12mm or thicker
even my bike stuff is 1/2" or it just ends up leaking

Offline Tman

  • Hero Member
  • *****
  • Posts: 3672
Re: Holset HX55 turbo.
« Reply #16 on: March 14, 2013, 12:32:47 AM »
My Holset Flange in between 12mm and 12.55mm. But, a thing to look at is the thickness of the pipe coming into it. If you have a thick flange with a very thin header, you will create issues there as well. Also, what is supporting the turbo? The pipe? Brackets? Lots of factors to consider.

Offline tauruck

  • Hero Member
  • *****
  • Posts: 5126
Re: Holset HX55 turbo.
« Reply #17 on: March 15, 2013, 09:47:08 AM »
I think I goofed in my original post. I was talking about making a bracket to hang the turbo on. I need to weld the bracket to the chassis to support the weight. The other thing I wanted to ask you all was whether I could mount the turbos with the air inlets pointing up?. Some have said that the oil won't lubricate the bearings at that angle but I am using 2 stages off my Weaver 5 stage pump for turbo lube. I'll hold off doing the brackets until I have a definitive answer. Thanks in advance.

Offline Tman

  • Hero Member
  • *****
  • Posts: 3672
Re: Holset HX55 turbo.
« Reply #18 on: March 15, 2013, 10:06:29 AM »
I am new to this turbo thing but everything I have read says the drain need to point DOWN!

Offline Peter Jack

  • Hero Member
  • *****
  • Posts: 3776
Re: Holset HX55 turbo.
« Reply #19 on: March 15, 2013, 10:24:23 AM »
The bearing must be horizontal with the drain pointed down. Both the cold and hot side can be rotated in any orientation but the axis must be in line with the horizontal bearing.

Pete

Offline Jon

  • Sr. Member
  • ****
  • Posts: 852
Re: Holset HX55 turbo.
« Reply #20 on: March 15, 2013, 03:33:20 PM »
It's not to do with the lubrication as much as the sealing.
The seal is like a piston ring and isn't designed to keep the oil in as much as the air out.
When you shut down the trapped oil will run into your lower housing.

jon
Underhouse Engineering
Luck = Opportunity + Preparation^3

Offline maj

  • Sr. Member
  • ****
  • Posts: 743
Re: Holset HX55 turbo.
« Reply #21 on: March 15, 2013, 05:44:25 PM »
Ok for a support brace think about some rod ends and shaft,  the headers will move as they heat and cool, bracing the turbo too much will put all this load on the headers .
 

Offline tauruck

  • Hero Member
  • *****
  • Posts: 5126
Re: Holset HX55 turbo.
« Reply #22 on: March 16, 2013, 12:00:41 AM »
Any member that makes a mistake when building a car only has himself to blame because you guys are like a family. The advice one gets here is always detailed and makes sense. Thanks. You all saved me from a lot of grief. :cheers: :cheers: