Quick ? about FPR and fuel flow direction!

FWP! · June 19th, 2002, 08:09 PM

Hey all, I just got my shiney new chrome plated adjustable FPR w/gauge and I'm confused after getting told by a few people which way the fuel actually flow through the rail.

The red fitting on the FPR is for the incoming fuel, the blue one on the bottom is the "drain" fitting, where it exits. If I take off the stock FPR, is the fuel going through there coming out? Like would I hook the "incoming" fitting right there to where the stock FPR used to be, or is that where the "drain, or exit" blue fitting would connect to?

Thanks

skelly · June 19th, 2002, 09:00 PM

The fuel in the rail would exit into the inlet of your FPR and drain out into the return line which is the rubber hose you see attached to your stock FPR.

FWP! · June 19th, 2002, 09:35 PM

Coo thanks

FWP! · June 20th, 2002, 06:54 PM

Alright the fitting didn't work. How do I "piggy back" the stock FPR??

skelly · June 20th, 2002, 10:35 PM

Take the output of the stock FPR and run it to a short length of high pressure injection hose to the input of your adjustable one, then run the output of the adjustable back to the fuel return line:

RAIL#2 -> OE FPR -> hose -> NEW FPR (INLET) -> NEW FPR (OUTLET) -> hose -> OE FUEL RETURN LINE

This is how I had mine configured originally.. It gave me less trouble in keeping the lines pressurized after shutdown, but I couldn't find fuel injection hose rated for highenough pressure to keep from blowing, so that's when I rearranged everything and upgraded the lines to steel braided.

FWP! · June 21st, 2002, 05:28 AM

And I just run a T to split the vacuum line to the stock and aftermarket FPR? How do I know where to adjust the screw to on the aftermarket one to start off with, then adjust it? Take the vacuum line on and off of it? Because if I take it off the fpr, it'll make it run to its max setting that I have it at, right?

K Brice · June 21st, 2002, 09:29 AM

I didn’t even end up using any extra fuel line. If you have the right 90 degree elbows and line things up properly you should be able to just cut a little section out of the existing return line (about half way between the OEM FPR and the hard return line) and clamp the new FPR right on. It’s as easy as that and makes for a pretty trick setup.
Yes just use a tee fitting on the vacuum line.
When you set your fuel pressure just disconnect the vacuum lines and adjust the set screw until the pressure is what you want at WOT.

FWP! · June 21st, 2002, 10:39 AM

Thanks Brice that's what I've been looking for

Ltsrunem · June 23rd, 2002, 09:33 PM

Quote:

Originally posted by K Brice
I didn’t even end up using any extra fuel line. If you have the right 90 degree elbows and line things up properly you should be able to just cut a little section out of the existing return line (about half way between the OEM FPR and the hard return line) and clamp the new FPR right on. It’s as easy as that and makes for a pretty trick setup.
Yes just use a tee fitting on the vacuum line.
When you set your fuel pressure just disconnect the vacuum lines and adjust the set screw until the pressure is what you want at WOT.

OR leave the vacccum on and adjust it to the setting for idle. Then take the vaccum off and you'll see where it's at on WOT. That's what I did. Samething just the opposite of what Brice said.

WES

June 19th, 2002, 08:09 PM	#1
FWP! PT Inner Circle Join Date: Feb 2000 Location: Rochester NY. Shittiest. Town. Evar. Age: 30 Posts: 15,628	Quick ? about FPR and fuel flow direction! Hey all, I just got my shiney new chrome plated adjustable FPR w/gauge and I'm confused after getting told by a few people which way the fuel actually flow through the rail. The red fitting on the FPR is for the incoming fuel, the blue one on the bottom is the "drain" fitting, where it exits. If I take off the stock FPR, is the fuel going through there coming out? Like would I hook the "incoming" fitting right there to where the stock FPR used to be, or is that where the "drain, or exit" blue fitting would connect to? Thanks __________________ Current daily: 2007 Chrysler Town and Country pimp wagon work van To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Weekender: '05 Audi S4 6 speed Past: '88 626 turbo, '93 red PGT, '94 white PGT, '95 Purple PGT, '95 Red PGT, '00 MGT, '07 Mazdaspeed3 The mom's car: White on black GTS, 5 speed, tint, 85k miles

June 19th, 2002, 09:35 PM	#3
FWP! PT Inner Circle Join Date: Feb 2000 Location: Rochester NY. Shittiest. Town. Evar. Age: 30 Posts: 15,628	Coo thanks __________________ Current daily: 2007 Chrysler Town and Country pimp wagon work van To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Weekender: '05 Audi S4 6 speed Past: '88 626 turbo, '93 red PGT, '94 white PGT, '95 Purple PGT, '95 Red PGT, '00 MGT, '07 Mazdaspeed3 The mom's car: White on black GTS, 5 speed, tint, 85k miles

June 20th, 2002, 06:54 PM	#4
FWP! PT Inner Circle Join Date: Feb 2000 Location: Rochester NY. Shittiest. Town. Evar. Age: 30 Posts: 15,628	Alright the fitting didn't work. How do I "piggy back" the stock FPR?? __________________ Current daily: 2007 Chrysler Town and Country pimp wagon work van To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Weekender: '05 Audi S4 6 speed Past: '88 626 turbo, '93 red PGT, '94 white PGT, '95 Purple PGT, '95 Red PGT, '00 MGT, '07 Mazdaspeed3 The mom's car: White on black GTS, 5 speed, tint, 85k miles

June 20th, 2002, 10:35 PM	#5
skelly PT Guru Join Date: Nov 2000 Location: The BAPOC Pit Age: 35 Posts: 6,207	Take the output of the stock FPR and run it to a short length of high pressure injection hose to the input of your adjustable one, then run the output of the adjustable back to the fuel return line: RAIL#2 -> OE FPR -> hose -> NEW FPR (INLET) -> NEW FPR (OUTLET) -> hose -> OE FUEL RETURN LINE This is how I had mine configured originally.. It gave me less trouble in keeping the lines pressurized after shutdown, but I couldn't find fuel injection hose rated for highenough pressure to keep from blowing, so that's when I rearranged everything and upgraded the lines to steel braided. __________________ FrankenProbe Sponsor - dead website, snagged by squatter "Pepe" - 01 Honda Insight - SOLD! To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. - 60MPG "Big Boss" - 02 Chevy K1500 Ext. Cab 4WD - "A-team" member - 5.3L 285HP To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. 15MPG To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

June 21st, 2002, 05:28 AM	#6
FWP! PT Inner Circle Join Date: Feb 2000 Location: Rochester NY. Shittiest. Town. Evar. Age: 30 Posts: 15,628	And I just run a T to split the vacuum line to the stock and aftermarket FPR? How do I know where to adjust the screw to on the aftermarket one to start off with, then adjust it? Take the vacuum line on and off of it? Because if I take it off the fpr, it'll make it run to its max setting that I have it at, right? __________________ Current daily: 2007 Chrysler Town and Country pimp wagon work van To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Weekender: '05 Audi S4 6 speed Past: '88 626 turbo, '93 red PGT, '94 white PGT, '95 Purple PGT, '95 Red PGT, '00 MGT, '07 Mazdaspeed3 The mom's car: White on black GTS, 5 speed, tint, 85k miles

June 19th, 2002, 09:00 PM	#2
skelly PT Guru Join Date: Nov 2000 Location: The BAPOC Pit Age: 35 Posts: 6,207	The fuel in the rail would exit into the inlet of your FPR and drain out into the return line which is the rubber hose you see attached to your stock FPR. __________________ FrankenProbe Sponsor - dead website, snagged by squatter "Pepe" - 01 Honda Insight - SOLD! To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. - 60MPG "Big Boss" - 02 Chevy K1500 Ext. Cab 4WD - "A-team" member - 5.3L 285HP To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. 15MPG To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

June 21st, 2002, 09:29 AM	#7
K Brice Five Star Member Join Date: Sep 2000 Posts: 2,259	I didn’t even end up using any extra fuel line. If you have the right 90 degree elbows and line things up properly you should be able to just cut a little section out of the existing return line (about half way between the OEM FPR and the hard return line) and clamp the new FPR right on. It’s as easy as that and makes for a pretty trick setup. Yes just use a tee fitting on the vacuum line. When you set your fuel pressure just disconnect the vacuum lines and adjust the set screw until the pressure is what you want at WOT. __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Motor Trend’s 1993 Car of the year. “The 2.2L turbo powerplant has been replaced by an all new DOHC 2.5L V-6” “We prefer the smooth pull of the all aluminum V-6” ?Does driving an 1987 B2000 qualify as Zoom~Zoom??

June 21st, 2002, 10:39 AM	#8
FWP! PT Inner Circle Join Date: Feb 2000 Location: Rochester NY. Shittiest. Town. Evar. Age: 30 Posts: 15,628	Thanks Brice that's what I've been looking for __________________ Current daily: 2007 Chrysler Town and Country pimp wagon work van To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Weekender: '05 Audi S4 6 speed Past: '88 626 turbo, '93 red PGT, '94 white PGT, '95 Purple PGT, '95 Red PGT, '00 MGT, '07 Mazdaspeed3 The mom's car: White on black GTS, 5 speed, tint, 85k miles