Boost reference FPR install
Thread Starter
Instructor
Joined: Mar 2014
Posts: 151
Likes: 2
From: Savannah GA
Boost reference FPR install
Have the ECS stage 2 fuel kit with AE1000 secondary. About to put on boost reference FPR on it 1:1. I want it to stay stock pressure but increase when boost comes in. Is that achievable without dropping the tank and putting the block offs in?
i have a full return going on with it, i just like to do it without dropping the tanks again if it will work just fine.
i have a full return going on with it, i just like to do it without dropping the tanks again if it will work just fine.
Last edited by Dyekid04; Jul 1, 2018 at 11:57 AM.
Burning Brakes
Joined: Dec 2001
Posts: 970
Likes: 34
From: Maine
I’m in the same boat as you are right now I will be bolting on a supercharger soon and would like to go with a boost reference regulator. I know the UPP system does have a return line but I’m not crazy about drilling and tapping into the tank, I like the ECS set up a little better, just seems a little more secure, and that is important when it comes to holding 15 gallons of a highly flammable liquid from leaking out of my car.
Last edited by Pete2k_Z28; Jul 1, 2018 at 04:30 PM.
Burning Brakes
Joined: Dec 2001
Posts: 970
Likes: 34
From: Maine
The way UPP does it is a tap the return back into the line coming out of the tank between the tank in the fuel pump. I’m not sure if the line sizes etc. of the ECS system would allow you to do that as well.
Racer
Joined: Dec 2014
Posts: 476
Likes: 14
From: Menifee CA
I’m in the same boat as you are right now I will be bolting on a supercharger soon and would like to go with a boost reference regulator. I know the UPP system does have a return line but I’m not crazy about drilling and tapping into the tank, I like the ECS set up a little better, just seems a little more secure, and that is important when it comes to holding 15 gallons of a highly flammable liquid from leaking out of my car.
My understanding of running an aftermarket FPR with reference, is you'd need to use the block offs if you want the siphon pump to work properly. I was told to leave my reference port open as to not have any issues. If you never run lower than the base pressure, though, I'm not so sure it would be a problem.
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,341
From: Gilbert AZ
Problem is you pull a vacuum, and it lowers the pressure at idle and low load, so depending on your setup, how much vacuum you pull/etc, you may not have a working siphon at idle/etc. Which will throw a code, flip the car out, etc.
I told him he could maybe put a check valve so the FPR only sees boost, and only raises pressure, while keeping stock 58psi.
I told him he could maybe put a check valve so the FPR only sees boost, and only raises pressure, while keeping stock 58psi.
Race Director
Joined: May 2004
Posts: 16,667
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From: Raleigh, NC
St. Jude Donor '15
I’ve heard of people connecting the vacuum connection pre throttle body, that way is never sees vacuum (ie never reduces fuel pressure) but sees boost and increases fuel pressure accordingly. I’ve never done it but a very respected shop/tuner gave the idea
Obviouslu you’d have to know how to set the fuel injector data up properly in the tune in order for this to work properly
Obviouslu you’d have to know how to set the fuel injector data up properly in the tune in order for this to work properly
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Le Mans Master
Joined: Jan 2009
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From: ocean springs mississippi
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
Yeah, I just did mine non referenced too honestly, though if you had enough fuel pump but were tight on injector DC it is a way to get around that without dropping the tank
Le Mans Master
Joined: Apr 2011
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From: Montreal
St. Jude Donor '13
You can still set pressure with it and run a return, even if not boost referenced. If you have enough pump and injector you can keep the AFR's where you want them without referencing.
Thread Starter
Instructor
Joined: Mar 2014
Posts: 151
Likes: 2
From: Savannah GA
Ahh i was under the impression if you dont block the stock regs it just always stays at 58psi? Basically you cant go lower or higher. I figured without the reference the only thing you get out of it is just a return style.
Last edited by Dyekid04; Jul 10, 2018 at 09:36 AM.
Le Mans Master
Joined: Apr 2011
Posts: 7,820
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From: Montreal
St. Jude Donor '13
That is right. It will stay at 58 psi, or whatever you set it to.