New Fuel pump question?
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 990
Likes: 0
From: North Texas
New Fuel pump question?
Ok, I decided to get a performance pump for the 383.
The Stock pump has 3 connections: 1 - Tank, 2 - Return, and 3 - Carb.
The new pump only has 2.
What do I do with the return?
The Stock pump has 3 connections: 1 - Tank, 2 - Return, and 3 - Carb.
The new pump only has 2.
What do I do with the return?
Racer
Joined: Jul 2004
Posts: 420
Likes: 1
From: Lapeer MI
Okay, this is what I know about fuel pumps because I just read it in a book. Low-pressure pumps (4-10 psi and 110 to 140 gallons per hour) are intended for carbureted engines. High-pressure pumps (30 - 90 psi and similar gph) are more often used with EFI. Low-pressure pumps use a dead heading style fuel pressure regulator with no return line, while high-pressure pumps use a bypass style fuel pressure regulator with a return line. High-pressure pumps are constructed with closer tolerances and more costly production. They will tolerate more severe operation conditions and last lnger than low-pressure pumps.
Lastly, high-pressure pumps will work well in carbureted applications when matched with the correct bypassing fuel-pressure regulator. Maybe you took off a high-pressure pump and purchased a low-pressure pump.
Hopefully this will help
Lastly, high-pressure pumps will work well in carbureted applications when matched with the correct bypassing fuel-pressure regulator. Maybe you took off a high-pressure pump and purchased a low-pressure pump.
Hopefully this will help
