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Fuel sending unit question
Like to get some advice…. Wish I had more experience here.
Going to run a 383 stroker with a Holley Sniper EFI. Spoke to Holley and their recommendation is to run all 3/8” fuel lines (supply and return). I did. Now looking at return on the sending unit and it is a 1/4 inch pipe on the sending unit. Seemed to be a “restriction”. Holley recommended to change it to 3/8” pipe and suggested the return tube should go down to about 1” from the bottom of the sending unit towards the bottom of the tank. The 1/4 inch return pipe in the sending unit extends about 3/4 inch below the top of the sending unit so it would have to be extended 6 plus inches.
So, here are my questions…
1- Is this a concern and has anyone run into problems with the 1/4 inch return on the sending unit for a 383 / sniper EFI configuration when rest is 3/8” fuel lines?
2- Anyone do anything to increase volume on the return pipe of the sending unit and if so what did you do? E.G. drill out 1/4 tube and weld in 3/8”?
3- Do you need to extend the return deeper into the tank regardless the configuration and if so what did you all do?
Hopefully I am just thinking about it too much ;-)
Thanks in advance all.
John
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