fuel pressure-normal or not?

[John Hartman]

Ok, so I am running a rewired Walbro 255, a 90 Colt SOHC rising rate regulator(used) and Hahn Racecraft 625 injectors.  The rest of the fuel system is stock.

At warm idle(drove for a half an hour) I get 47 psi with the pressure reg vacuum line connected, and 54 psi with it off.

seems to hold the pressure well, only bleeds off a little bit, like 1psi in a half an hour.

So is this good, normal etc?  

Anything I am doing wrong, or shoud do differently?

thanks

[Mike Meron]

sounds like your feeding those injectors nicely!

[John Hartman]

so its all good then?

I was hoping you would answer, being the Colt guru and all.  We may be the only guys running these regulators.

[Mike Meron]

not the only ones but close...

[JamieSibley]

If you pick up an electric fuel gauge, for a manual one to put on you hood for just one pull. Then you can see if your pressure is dropping off near redline.  If the reg isn't being over run and is working normaly, it will hold the correct pressure all the way through a pull.  IF.. 1/2 way through a pull your pressure drops , or stops rising with boost, then you are at the point that the reg isn't being overrun and starts to function normaly.

[John Hartman]

yea, I kinda am thinking about running it up on the hood for 1 or 2 pulls and see.

Don't really know how to accomplish this tho, flexible hose?  Also without cutting, where to route it?

[Troy Simkus]

yea, I kinda am thinking about running it up on the hood for 1 or 2 pulls and see.

Don't really know how to accomplish this tho, flexible hose?  Also without cutting, where to route it?

no no, just a collection of perfectly alligned mirrors, easy as pie.

[John Hartman]

LOL

the thought did cross my mind.

As did putting a digital cam under there with a strong light, set it on movie and do a pull.

Anyone wanna volunteer thier cam??