Don's 1JZ Autox Project - Page 20

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  1. #191
    CelicaSupra.com Member
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    Roadtrip!

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  3. #192
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    Circling back to this bspt vs npt thing, the difference is 27 threads per inch and 28. Most Japanese manufacturers use BSPT exclusively, and I've personally seen an NPT fitting jammed into the BSPT port with some thread tape without subsequent issues.

  4. #193
    CelicaSupra.com Member Don L.'s Avatar
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    Mar 2003
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    It's a really good reminder to owners of the difference. Fortunately, with some searching on Google, there are some suppliers of BSPT fittings so we can properly complete connections. These engines have both metric fittings and BSPT, that's the bottom line. A good tap/die set and thread pitch gauge helps.

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