Use a VaporWorx PWM controller on the fuel pump and go returnless, you'll be happy you did. The VaporWorx controller throttles back the fuel pump when only a little fuel is needed so the pump runs cooler, quieter, and lasts longer. Why run the fuel pump at max and pump fuel through a hot engine compartment for no reason? Full disclosure, I tried a return style system before moving on to my MAP referenced VaporWorx controller. My system has a Fuellab filter with a check valve back by the tank which has a CTS-V pump module.

 

I’ve run return,ESA with the Corvette bypass filter on both my swapped Chevelles, one an LS and the other a DI V6. Pump and filter mounted in frame rail on pass side. No problems with either car.

 

I’ve run return,ESA with the Corvette bypass filter on both my swapped Chevelles, one an LS and the other a DI V6. Pump and filter mounted in frame rail on pass side. No problems with either car.

Where did you obtain the quick connect fittings? When I built my '67 LS1 car, I had the hardest time finding new fittings, I gave up & had to scrounge good used fittings at pick-a-part.

 

Only way you dont need a return line for reliability is a pulse width modulated fuel pump.

 

Technically, my engine is considered “return less”. My installation is not.
The Corvette bypass/filter is a reliable way to route excess fuel back to the tank without running a return line the length of the car.

 

I was thinking of going with Holley 255 LPH OE Style EFI Fuel Tank Module

 

I used a Corvette Fuel Filter and dead headed the LS

 

Seems like most people are using "returnless"
Liking the pictures that were posted
Gives it a cleaner look going towards the fuel rail near the firewall
Tho all the fuel systems technically have a return less fuel lines up against the engine frame to the frame rail the better

 

Then pcm and harness are from a 2000 silverado, the fuel rail and injector are from a 2004 silverasdo 4.8, will that have to be logged in when I get the mail in tune?

 

i have a return style fuel system. If I had the coin I would go with a return less system. I built my fuel system before PWM was around and just never had a need to change it up too much. With the regulator gone it is just 1 part less you need to worry about for failure. Also if you live in a climate where vapor lock may be a concern, return less is the best. Keeps the fuel as cold as possible. Further to that its less harsh on fuel pumps and current draw.

That said a return style system is still cheaper than a PWM control. Both will do what they need you too. Keep in mind not all fuel pumps are compatible with PWM controllers.

 

My fuel rail got changed to returnless but I do run a short length of return at the tank. This is using the combined Corvette C5 filter and regulator assembly bolted very near the fuel tank.

I can get you the part number later today if you need it.

Rick

Sent from my SM-G965U using Tapatalk

 

I wouldn't dream of running a return less fuel system with todays moister sucking fuel..

 

If you have a carburetor, use returnless system. If not, use return. Benefits of the Returnless System- Extended engine life- Well suited to slow idle engine designs- Adding Fuel Pump Pressure Gain gives better cold starting capability
Benefits of the Returnless System- Reduces CO2 emissions by up to 1/3
Both systems increase fuel efficiency but returning does so more significantly because returning finds the unused fuel and sends it back for reusability after duing combustion as opposed to sending fresh fuel down each time. However returning is more complicated and requires many costly components that can be deleted with a returnless system; this means that there are only benefits other than efficiency.