Engine experiment

[douglas]

I have an old van I use alot and I'm going to do an experiment on the darn thing as far as saving gas. The gas tank has three hoses, send, return, and vent.
Now when the fuel pump is running it sends gas to the injectors and the leftover gas returns back into the tank.
I'm doing some calculating so if I splice in a T on the send and return line with a valve in the middle I may be able to control the amount of gas going into the injectors if the onboad computer will allow it can pick up the amount of air and gas going into the cylinders as well as the burned up fuel going out from the tail pipe with the O2 sensors. If all works as planned I could save as much as 20-30% on gas

DO NOT TRY THIS UNLESS YOU KNOW WHAT YOUR DOING!!!
This is only an experiment

[bscamo]

Good luck Doug !

I've seen this tried several times without getting the desired results. In fact , most of the time , this approach caused problems.

What I have seen work though is a thermostat controlled fuel pre-heater. And they sometimes cause injector damage if not done right. The right temp is critical. And you can't buy them.

I once put one on a 1980 Chev Citation with a carb. The gains ranged from 1 % to 50%. But I also had vapor lock problems with it. When it worked right , I averaged a 20% gain in MPG.

Right now , I have a FuelMaster magnetic device installed on my injected straight 6 cyl. I don't know why it works , but I average a 2 MPG gain on the highway. And these results are figured on paper , not off the top of my head. I keep written records. This thing had paid for itself after I had used 10 tanks of fuel.

[jack]

Gidday

I doubt veery much that this will work. I have no idea how you figure it can save anything as the amount the injecter put in the ciylinder is not governed by anything but the govenor. If you start to restrict the supply to the injecters you will have major problems and if any air gets in from the return line then you will get an air lock and the engine will just stop.

[nnbreeder]

Another thing I was thinking about is that at lower pressure the fuel won't atomize and could puddle on top of the piston which could cause washing of the cyl walls and lock-up or it could burn a hole in the top of the piston. Diesel engines are prone to this problem if injectors aren't properly cared for.

[bscamo]

Hey Doug ,

Did ya try this and , if ya did , how'd it go ?