"Clocking" a turbo?

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Old Feb 25, 2005 | 08:56 PM
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b18-c-rx's Avatar
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Default "Clocking" a turbo?

My GT28RS has the compressor outlet pointing up when the turbo is mounted in the car. I have heard people saying that they twist the compressor to fit their needs (in this case, I would like the compressor outlet to point down). How does this work, is it possible (if so what do I do), and to what extent can I twist it before it blocks some oil path or something?
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Old Feb 25, 2005 | 09:00 PM
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rmcdaniels's Avatar
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Default Re: "Clocking" a turbo? (b18-c-rx)

just loosen the bolts that secure the compressor housing, then you can spin it around. Same for turbine housing, and you can point them any way you want, just make sure the oil path through the center section is close to vertical.
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Old Feb 25, 2005 | 09:57 PM
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Default Re: "Clocking" a turbo? (rmcdaniels)

thanks for the info
one thing i'm not clear about, though -
what do you mean by the oil hole "through the center" being vertical? make sure the path for the oil is vertical?
also keep in mind that my turbo is water cooled and oil lubricated - does this bring upo any other issues?

i read something at one point that implied that you can only clock turbos to a certain degree - is this at all true/
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Old Feb 25, 2005 | 10:28 PM
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Default Re: "Clocking" a turbo? (b18-c-rx)

I think I can spin my GT28RS all the way around, but I don't feel like finding it and checking. Oil passage is vertical, or within 30 degrees of vertical, and water passage is horizontal.

Do you have the oil restrictor and an inline filter? Restrictor is a must have and filter is a good idea.
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Old Feb 25, 2005 | 10:52 PM
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b18-c-rx's Avatar
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Default Re: "Clocking" a turbo? (rmcdaniels)

[QUOTE=rmcdaniels
Do you have the oil restrictor and an inline filter? Restrictor is a must have and filter is a good idea.[/QUOTE]

Why is a restrictor necessary if you have the right size hose? the kit i got from fast-turbo does not have a restrictor, the dealer said it was not necessary. If it is, i guess i can but one from ATP.
I'm not sure what an inline filter is :[

fill me in :D
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Old Feb 26, 2005 | 06:24 AM
  #6  
rmcdaniels's Avatar
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Default Re: "Clocking" a turbo? (b18-c-rx)

The restrictor is a little pinhole, you'd have to have an awful tiny hose to restrict the oil that much. It's necessary because Honda oil pumps make enough pressure to blow the oil seals out of a ball bearing turbo. It happened to another guy here in Raleigh after he drilled out his restrictor because it looked too small. A journal bearing turbo uses oil pressure to float the bearing, so you need a good bit of pressurized oil to keep the bearings floating. Ball bearings don't float, you just need a little trickle of oil to keep them lubricated.

Because the hole in the restrictor is so small, any little thing in the oil line will clog it and then your bearings will fail. I've seen people get a little piece of grey Permatex stuck in there and block the oil feed. Their turbo bearings died soon after. I use a metal screen basket strainer made for nitrous filtering. NOS makes one that has the same AN fittings as a standard turbo oil feed line and it is easy to remove the strainer and clean it out.
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Old Feb 26, 2005 | 06:59 AM
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Default

get an oil supply line kit from Stan (Flamenco-T). You won't have to run a restrictor with the supply line from that kit.
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Old Feb 26, 2005 | 09:12 PM
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Default Re: (IslandSi)

yeah im getting the kit from stan.
are you sure thats ok for a GT?
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Old Feb 27, 2005 | 08:42 AM
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It's only $12 for the ATP fitting:
http://www.atpturbo.com/Mercha...e=OIL
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