I have a return setup and not deadheaded. I have a major fuel smell from the rails but no leak so im thinking hot fuel. Car starts up super quick anytime. No priming needed.
Anyone regret switching to return style fuel system?
- Thread starter lx347cid
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I'm dead headed and have my pumps run full time.
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Do you need to be re-tuned after going to a deadhead setup? I may do tha tafter I sort out my other issues.
I believe some adjustments are needed. I had Pete tune my deadhead setup so if you use him too it should be a breeze.
I would say yes. Are you running a wideband? I would also make sure your fuel pressure is stable at the rails after going deadhead.
Malcolm said he had to do some minor tweaking to his tune even when he would switch the fuel pressure regulator brand.
Just make sure you have enough pump and a good regulator, and you should be good. Also, if you do relocate your regulator to inside of the fender, make sure to use a very small and hard tube for vacuum/boost reference. That way you don’t have any resonance issues. I used hard poly tube that was the same diameter as tubing used on a boost gauge.
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Yeah. I noticed this when I went to the VMP set up and the PPRV was deleted. I let it prime for about 5 seconds now until the chime stops. I'm still on pump 93 and returnless but yes the starts take much longer now. It doesn't bother me, and it's the same every time but definetly cranks a few seconds longer than before the PPRV delete. Fore return system will be going on soon and E85 so we'll see if that changes the starts any. I notice more fuel smell now too but that may be in the tune. He told me it's set up a little rich until it gets warmed up
I'm using a small diameter silicone hose that goes to the regulator in the fender. Haven't had issues.
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I'm just about to purchase Fore L1E....and also plan on using stock rails....any tips for install? how did you run fuel lines? how did you power the pumps(ie make you own relay setup or FC2/FC3)?
Get the PTFE lines. I ran my lines up the passenger side and mounted the regulator next to the intercooler pump. I didn't want to make my own relays and the FC3 controller is extremely easy to install and set up the pumps. You can use your the FPDM to prime the pump/s like stock or they will continuously run with the key on. I'm using a HOBBS switch so only one pump runs until I get into boost then the other pump turns on. I forget the members name but in the engine and tuning section someone just completed a Fore return system.
edit here is that thread https://www.svtperformance.com/thre...uel-system-for-e85-kb2-8-and-install.1164720/
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I just had a shop put on my system. they did it a little different but i'm glad you mention the pumps will stay on all the time w/ the key on. I was kind of worried about that b/c i had the key on while loading up the perameters to tune and man let me tell you those things buzz loudly and it just keeps going and I had a CEL but it was for the FPDM. reminds me of one of those bug lights my parents had back in the day that hung on a pole while we were out back
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No Deadhead here and my garage smells like a petroleum refinery. Down the road when I change the lines I will go with Deadhead setup.
Also, just as a reminder after a couple of years, you will need to change the lines coz the 10% ethanol in gas over time it eats the inner rubber of the hoses causing leaks.
Also, just as a reminder after a couple of years, you will need to change the lines coz the 10% ethanol in gas over time it eats the inner rubber of the hoses causing leaks.
Dead head here . No regrets. Starts up quick. Mounted the regulator in the inner fender well drive side to combat heat. At 2.99 a gallon and car is smooth as can be on e85. 
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Can you elaborate on "engineering design point that is a big no no'? I have never heard that.
This is one of those topics that can be argued for ever. On a deadhead you are putting the FPR before the rails. If the FPR fails it can cut off fuel to the rails and good bye engine. When designing things it is not best practice to add fail points.
That being said thousands of people, even high end race cars run dead head for many many years and have been fine. Chances are you will be fine. I just have a lot more than most in my engine and did not feel safe when I designed my system to do dead head.
I thought generally, if the fuel pressure regulator fails it's the diagram inside. And if that were to happen, you'd be getting tons of fuel. Not the other way around.
Maybe I'm wrong?
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If the regulator fails i don't see the car running unless it fails and begins operating at 30 psi instead of 40 psi or something like that. A total failure and the car isnt going to run. Not worth worrying about.
I either hook up a battery charger or pull the fuses for the pumps when loading a tune.
Like I said it is rare and most just ignore the chances. If the FPR fails to open at full throttle on a dead head then your engine gets starved. If you run FPR post rails and it gets stuck closed you flood the engine and stall out. If it gets stuck open engine still getting fuel but wont maintain pressure so probably will stall out.
Like I said this can and has been argued for decades. The chances of it happening are very very very slim but still a chance.
Correct except if it gets stuck closed at full throttle then your engine gets starved.
I suppose it's like any other fuel component that could fail ( fuel pump, injectors, fuel filter, bad fuel, ect) and cause engine failure.
I see where you are coming from though.
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