Fuel pressure regulators, was Re: Fuel pump questions

[Joe Boucher]

Ed wrote:
> 
> bruce plecan wrote:
> >
> > Maybe I should have asked this first, are you talking about the FPR for
> > the injectors, or for a seperate fuel system for when the NOS in on?.
> 
>         It's the FPR for the injectors. The nitrous system was a small 50hp
> single fogger. I tapped the fuel source from the FPR's pressure gauge
> port.
> 
> > a large difference in system pressures, and two return lines.  Sometimes
> > if the NOS step isn't too large, they use the NOS to hammer the FPR,
> > in it's vacuum reference line to just run the pressures as high as
> 
>         This is exactly what Nitrous Oxide Systems does on their "dry manifold
> system". A tee from the solenoid is connected to the FPR's reference
> line and uses the injectors for nitrous enricment. It's the simplest
> nitrous system to plumb since there's no fuel solenoids.
> 
>         Here's what the Supra's fuel system looks like. Pardon the artwork :-)
> 
> pump===========FPR=======RAIL
>                 |
>                 |<---return line.
> 
>         Acceptable way to plumb the FPR?
> 
> -EdThis will probably work most of the time, but the problem is at wide open throttle.  The 
regulator should attach at the end of the fuel line.

 pump=========RAIL=========FPR
                            |
                            |<---return line.