Old projection TBI back to carburetor
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Newbie
Joined: Apr 2018
Posts: 4
Old projection TBI back to carburetor
I bought a 67 Camaro and it had the Holley projection 2D system, it’s fidgety and the guy who installed it butchered the wiring. i finally had it. I decided to switch back to carburetor. I got a 1406 Edelbrock. My question has to do with the fuel pump it has a return line to the gas tank. Can I plug the return line and just have a regulator on the inlet portion to the carburetor? I’ve never done this so any help would be highly appreciated! I know i have to get a regulator for about 5.5 psi but the fuel pump is most likely running higher pressures. I’m scared of using one of the cheap Mr. GASKET regulators that specify no more than 8psi. Thanks again!
1st Gear Member
Joined: Feb 2018
Posts: 251
Holley makes a good adjustable pressure regulator. You'll need a gauge which you can screw into the other outlet on the regulator. Use AN fitting (not hose clamp) to connect line from tank to regulator.Check pressure and for leaks before starting engine.
Newbie
Joined: Apr 2017
Posts: 4
fuel pump
Good morning.
You really need a return line as that is how the system is designed.
If you don't you may over work the pump causing the pump to run hot and fail prematurely. The max fuel pressure to the carb is 6-8 pounds.
If you don't you may overpower the inlet needle and seat causing it to overflow and flood the engine. So you do need a return regulator.
A added benefit of the regulator is it should always pumping up cooler gas from the fuel tank.
I hope this helps and good luck!
Todd
You really need a return line as that is how the system is designed.
If you don't you may over work the pump causing the pump to run hot and fail prematurely. The max fuel pressure to the carb is 6-8 pounds.
If you don't you may overpower the inlet needle and seat causing it to overflow and flood the engine. So you do need a return regulator.
A added benefit of the regulator is it should always pumping up cooler gas from the fuel tank.
I hope this helps and good luck!
Todd
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Todd's post is 100% spot on, Only reason I posted was to just back him up. If the pump is the kind that require the fuel for cooling and you reduce the flow the life of the pump will be measured in hours instead of years.
Of course the pump manufacture specs could shed some light a requirements and quick phone call to the manufacture could get you the best way to get where you want to go.
Of course the pump manufacture specs could shed some light a requirements and quick phone call to the manufacture could get you the best way to get where you want to go.
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