Oil feed line t25 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-03-2014, 07:14 PM   #1
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Default Oil feed line t25

Should I use an -3an or -4an line for my oil feed to my t25 turbo?
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Old 08-04-2014, 01:32 AM   #2
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I started with a -4an line and found my turbo was burning oil due to pressure. I installed restrictors but nothing stopped it. I eventually switched to a -3an line with no restrictor and my oil burning is over.

On the other hand I've seen a perfectly healthy smoke free T25 / -4an line on a matching Miata.

I would recommend the -3an line, it should flow plenty of oil.
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