Quote:
Originally Posted by BanditDave
Actually guys, I'm an engineer, so nothing you are telling me is shocking my world. Funny enough, thermodynamics is something I am quite good at.
I guess where I am having the issue is I understand how a fuel system is laid out, but if the Comp tech guy tells me I need a vacuum referenced regulator, but don't need to hook up the vacuum line, then why exactly do I need it as I am already regulated back at the tank.
Greg, you said that I can set the injectors to the higher pressure rate...I understand that but if the EZ EFI knows that it is going to have 58psi in the line and that is what it is set for, then why have the additional regulator if that is what it is looking for. In the video I posted the 572 that had the EZ EFI on it look like it was dead headed. The pressure in the line will actually drop a bit as you get into it, which is why I figured you would need a vacuum referenced regulator to boost fuel pressure. Once the tech told me I didn't need to hook up the vacuum line I was a little puzzled.
There in lies my problem. I overthink everything. If I need to have the regulator in line that is fine. I will put it in just after the throttle body as recommended and run a return back to the tank...not a big deal.
My question then goes back to the 4th gen fbody set-up. I was able to run the deadheaded configuration with a simple line from the tank, to a Vette regulator and back to the tank - with a single line to the front...no vacuum reference at the regulator. My assumption then is that the computer handled the adjustments at the rails...is that a correct assumption?
Thanks guys,
Dave
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I have run rear-bypassed systems with and without a vacuum reference to the regulator. Both ways worked fine for me. With a forced induction setup I like the reference line so I can get additional fuel pressure under boost.
I think you're fine running without it, and just having a static (unchanging) fuel pressure.
Jody