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need help figuring turbo fitting size.

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Old 07-30-2010, 11:56 AM
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Default need help figuring turbo fitting size.

the feed hole on my turbo seems kinda big, i have a npt fitting that i found in the garage and it seems to fit into the feed hole fine, im not sure what npt fitting it is but i took my micrometer and measure the thread part, it measured out to 0.510". is that a 1/8 , 1/2 , or 1/4 NPT ?? im looking for a oil restrictor that will fit onto the turbo feed hole and also fit onto my oil line.
Old 07-30-2010, 03:05 PM
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Default Re: need help figuring turbo fitting size.

Do you know what turbo you have?
Old 07-30-2010, 08:52 PM
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Default Re: need help figuring turbo fitting size.

Originally Posted by SpeedFactoryRacing
Do you know what turbo you have?
garrett 57 trim .60 compressor/ .48 turbine
Old 07-31-2010, 08:54 AM
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Default Re: need help figuring turbo fitting size.

If it is a 57 trim then the oil feed line inlet is an 1/8" NPT fitting, and I would run a -3AN line with no restrictor to start.
Old 07-31-2010, 09:42 AM
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Default Re: need help figuring turbo fitting size.

Originally Posted by SpeedFactoryRacing
If it is a 57 trim then the oil feed line inlet is an 1/8" NPT fitting, and I would run a -3AN line with no restrictor to start.
the hole is actually bigger than 1/8 npt thread, i got one fitting from a air tool and it fits into the turbo feed hole perfect. i think its a 1/4 npt thread.
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