vortech fmu?

[selmerguy]

i was just going over in my head how to go about my turbo kit install. the oil lines and all are very easy to understand but i still dont get the fmu. the fmu has 3 fittings. in,out and vaccum. the "in" line is the fuel line after the stock fpr going to the fuel rail. the out line goes back to the tank. the vaccum line goes to a source near the manifold. if this is correct how does the fuel get to the fuel rail and then to the injectors?

btw i know very little about fuel systems.

 

[selmerguy]

ok i think i just got it. please someone tell me if i am right. the fmu is kinda like a tee going between the fuel tank anf the stock fpr. when the vaccum port senses boost from manifold source it takes fuel that would normaly be returned to the tank and pushes it back through the stock fpr and to the fuel rail. then to the injectors and into the motor.
i know calling it a tee is kinda stupid but i dont have a better word.

 

[selmerguy]

can one of you smart people out there please tell me if i am right or not?????
and where is a good place to rum the vaccum line?

 

[green95hrcgs]

You are pretty much right. When it gets a boost signal via the vacuum port, it limits the flow back to the tank thereby increasing pressure in the rail, and you get more FP.

 

[selmerguy]

the vaccum line goes to the intake mani right?

 

[green95hrcgs]

the vaccum line goes to the intake mani right?

You can tee it of from one of the other vacuum lines that are already there, BUT I have mine dedicated to the three barb fitting on the mani. I think that it would be better to just have it run directly.

 

[selmerguy]

is there a vaccum line on the stock fpr? if so can i tee into that?

 

[green95hrcgs]

Well, I know that on my 95 the FPR was on the end of the fuel rail. It did have a vacuum line on it, and I dont see a prob with using that existing port if you have a 95.

 

[selmerguy]

i have a 97 and i will have to see when i start my project install. I think i have figured out where all my vaccume lines go. thanks for all the help.