Plumbing in a Fuel Pressure Regulator

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05-04-2016, 07:24 PM

#21

slocaddy

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If you do not use boost reference on the regulator, you will always have the same set fuel pressure , don't change with boost.
Is that what you meant?

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05-05-2016, 12:34 AM

#22

35spline

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Quote:

Originally Posted by jimmyg View Post
I think the best place for a reg is after the rails. Think about it ,all a reg is is a restriction in the line to keep pressure up. On my build I'm using -8 to the rails, y fitting into -6 to each side of rails, -6 to reg, -6 return .this will insure full volume to injectors. When placed before the rails, the higher the fuel pressure, the lower the volume.

I have a 2005 returnless truck intake. If I want to put the fpr after the rails I need to figure out where to tap the stock rail for a fitting. Any ideas? If I gut the schrader valve I would have a an 4 fitting out in the middle of the last rail. The reg would be after the rails but would the -4 fitting going in to the regulator be too much of a restriction? I would still have the option to run any size line out of the fpr for the return

Last edited by 35spline; 05-05-2016 at 12:42 AM.

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05-05-2016, 06:15 AM

#23

forcd ind

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A deadhead system will work fine, I used it on an LS3 intake, ran the feed, return to the reg, then a line to the fuel rail-FP maintained at 43, rose with boost