davychronic's build

Thanks for the info guys, I will ask nishan once he's not busy anymore, but walbro intank and Bosch 044 pretty simple maybe I could make it work. Just mounting the 450. Hopefully just zip ties it and pray to batman it works

 

I can take a look at what Ken made and if it's nothing complex I could draw something similar for you to get made.

 

Thanks for the info guys, I'll try my best to do dual pump first then if I can't then I'll do inline method.
I'm gonna ask nishan once he's available
[doublepost=1517690267][/doublepost]@AYOUSTIN oh thank you very much, but since I live in Hawaii, there's not much shop that "can actually" make it for me tbh so I resort on just buying it directly already made

 

Ah, yea that makes things a bit harder haha

 

Yea doing the dual pumps isnt that big of a deal, everything just fits in very tight then you have to deal with how to route your lines on top.


This is kind of what i have going on so far. Ill have to play with it more when i get time, having a lot of 90 bends in your fuel flow isnt great. Its just a lot of trial and error kind of stuff so i wouldnt set any kind of deadline or have a fixed budget when you are working on it. I now have a drawer in my toolbox dedicated to all the fittings i bought that i thought if use but didnt work out. 100s of dollars in fittings.

 

@AYOUSTIN and @davychronic thanks guys for answering my questions and what not, I'll buy ken if he can sell me one of those or anyone that can make me a mount I'll pay for it, thanks guys, this forum is actually really helpful
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In that picture the 2 feedline goes to a y and goes to a single line right? Also what did you do about the oe feed line? Did you convert it to return like others did?

 

@Eroler1
Im down to make one again. it wasnt too big a deal, getting measurements might be tough if I have to take the pump back out. maybe I can make a few. Right now I just need to spend a week or so catching up on other projects.

 

Sorry I didnt see this yesterday.
Yea its hard to see in the picture but I have both feed lines feeding to a y block that is dual -6 inlet and -8 outlet and yea i have the factory feed line as a return (one of my feed lines is covering it in the picture) that i have a hose in the basket routing down in the bottom of the basket. Another thing i didnt think to mention before is i believe the factory fuel pressure regulator being removed might increase some noise in your fuel lines since it would also be serving as a fuel pulsation dampener. You wont want to keep the factory fpr because of the pressure differential for the pi injectors and youll want a quality fpr (this is not a part to try and save money on). Most people wouldnt notice the additional noise and with how loud the di injectors are you may not even hear it. Also you will want an fpr that is confirmed to be working with a returnless style fuel system which is one of the main reasons i went with the one i did. Aeromotive specifically lists this part number to be compatable with returnless fuel systems. You could route your fuel lines a few different ways as well and dont necessarily need to y them into a bigger line. I think Austin ran two feeds on his and used the stock feed as a return.

 

@Maisonvi thanks man, I'm really interested in getting one or three if your mounts, no rush, lmk anytime.

@davychronic thanks bro, I will just copy your setup lol it sounds the easiest for me to digest. So just confirming , dual pump to YY>tee>hpfp/PI rails>regulator return? Is that about right? What is the fpr you used? And where did you place it? Thanks man

 

Also, I updated my pi thread for you

Sent from my SM-G950U using Tapatalk

 

From pumps to the y then run the new feed to the fpr with the return on the fpr going to the stock feed.



Then fpr to the pi rail



Then pi rail to the hpfp



The fpr i use is the aeromotive pn 13139 which has -8 inlets and -6 return. And i made my own bracket to put it on the driver side frame rail in front of the fuse box. You can put it just about anywhere but keep it away from heat, you dont want any fuel vapor locking anywhere.

 

@davychronic thanks bo, appreciate it so much, gonna take out my pump this week and mock up everything

 

You put the FPR before the rail/pump? Interesting I went with after, wonder what difference that makes. I cant remember why I did it now, but I remember talking about it with people as a way to go.

 

How do you put it after the hpfp? I did it according to what the diagrams from aeromotive show. Most fprs are not designd to operate correctly the way i have it which is why i specifically got this one which is designed to operate this way safely. I suppose you could put it inbetween the pi rail and hpfp but it will still be essentially routed no different in respect to the hpfp.

 

Ah, Im using an AEM FPR. And its just mounted on the return side for me. so my goes: In tank pump -> T- At hpfp -> PI rail -> FPR -> retun to tank

 

I had thought about that route but it didnt make sense in my head how the fpr could regulate pressure to the hpfp. Now im no expert or engineer as this is the first car with a returnless fuel system that i have modified. My thinking is that the fpr will pressurize the pi rail but there isnt anything stopping unregulated flow to the hpfp since the T offers full flow from the pump to the hpfp. I may be wrong here and Austin may be able to explain better but that was just how i thought in my head.

 

lol Took me a bit too, but after thinking about it, this way the system will ALWAYS be at the set pressure (say 65 psi) The pump is putting out say 80 psi, and the regulator is letting it only get to 65 and dumping the rest back in the return. Your injectors spray and with your way will "lower" the pressure. With the style I have, it will still stay at 65 psi because the regulator is after the injectors, so as far as its concerned they arent even there.

Thats the idea at least. its kinda hard to wrap your head around at first, but with the regulator before the injectors, the system has no idea what the pressure really is, just that the FPR is letting in 65psi. My way you know the system should always have 65 psi no matter what.

Does that make sense? not sure Im explaining it well.

 

Well the way i have it routed is essentially the same as stock except that it is a 1:1 rising ratio and not in the tank. The regutator will equalize flow on both inlets to the set pressure which is regulated by the return. So the pressure to the rail and the hpfp will be the same as the pressure being supplied by the pump.

 

Oh duh, you are staying return-less. Thats the big difference. Curious to see how that works out.

 

Yea i mean obviously there is a return now but i spent some time talking with aeromotive tech support to ensure this will work properly so i have confidence it will work without issue. The only other way that was suggested by them was inbetween the fuel rail and hpfp but they said it will operate the same in either place.