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What Fuel rail fitting ?

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Old Feb 10, 2017 | 09:51 AM
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Default What Fuel rail fitting ?
What Tee fitting would suit the fuel rail to connect a fuel pressure gauge?
Kept looking but not sure what's the right one.
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Old Feb 10, 2017 | 09:56 AM
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It's a -4 AN fitting I believe
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Old Feb 10, 2017 | 11:53 AM
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Originally Posted by schpenxel
It's a -4 AN fitting I believe


OP, get a 4an to 1/8npt fitting. A straight one will work fine but if you want to read it on top get a 90.
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Old Feb 10, 2017 | 04:28 PM
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If you have stock fuel rails, where do you put it?
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Old Feb 11, 2017 | 07:22 PM
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Close to the firewall.
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Old Feb 11, 2017 | 08:37 PM
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Originally Posted by timd38
If you have stock fuel rails, where do you put it?
You either run a hose off the test port or just put it there.
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Old Feb 12, 2017 | 10:58 AM
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This style is popular. As mentioned earlier 4an to 1/8"npt. With the option of a 90 degree elbow. Almost every gauge manufacturer however will warn you (or have a disclaimer) mentioning not to attach it directly to the fuel rail/engine due to vibration. The correct way is to isolate it with a hose and mount it on your firewall. This is especially true with fuel pressure transducers.

http://www.ebay.com/itm/CHEVY-LS1-LS...-/260673352895
Last edited by KENS80V; Feb 12, 2017 at 11:06 AM.
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