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FPD delete tap size

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Old Jun 4, 2017 | 05:09 PM
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FPD delete tap size
Hi,

I've been following the banzai racing FPD delete guide, and it specifies a 1/4-18 tap for the fuel rail, but the ID of my fuel rail inlet is 0.471 inches... Anybody else have this issue? 94 JDM FD.
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Old Jun 4, 2017 | 05:11 PM
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There is no issue. Just follow the instructions
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Old Jun 4, 2017 | 06:55 PM
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Am I missing something? 0.25 inch tap is loose in 0.47 inch hole.
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Old Jun 4, 2017 | 09:36 PM
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Just follow the instructions and report back when you're done
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Old Jun 4, 2017 | 09:42 PM
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Found out the 1/4 inch tap I had just wasn't NPT.
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Old Jun 4, 2017 | 10:16 PM
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Why are you deleting the fpd? It serves a purpose.

https://www.rx7club.com/single-turbo...tions-1090373/
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Old Jun 4, 2017 | 11:17 PM
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Originally Posted by Narfle
Why are you deleting the fpd? It serves a purpose.

https://www.rx7club.com/single-turbo...tions-1090373/
He could always run an aftermarket Radium one.
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Old Jun 5, 2017 | 09:15 AM
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a 1/4 npt tap isn't 1/4" in diameter. Just follow the directions and you'll be fine.
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Old Jun 8, 2017 | 03:16 PM
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1/4"-18 NPT tap drill diameter is 7/16

Pipe sizes are oddly named... on larger pipe sizes the nominal size (like 1 1/2" pipe size) is very close to the ID of the pipe.

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