Long story short, my fuel line that comes out the firewall is fucked. I was going to run -8 from the tank to the rail out hte driver side and set it up like a k series (i got a b16a) So the reg/supply and return is all on the one side. Now ive seen this on low hp b series, no problems, Im looking to make 500+. Would this setup cause me to potentially lean out on the far cylinders?.
Cliff notes

Advantages to driver side:
-shorter line
- dont have to pull the dash and heater to run it to the oem location (crx)

Cons
-run lean at the far end??
-Too much weight on the reg (plan on getting aeromotive)??

TIA


Modified by Boosted Chemist at 8:58 AM 5/30/2007

 

bump

 

im not really sure on what u are asking. Do u mean that u are deciding about putting the regulator before or after the fuel rail?

 

Yeah kinda like a k series

So the supply would go through the regulator into the rail.

 

Here is a diagram, Shitty i know but u get the point

blue= rail
grey = supply
red= return
black = regulator

 

I can see the pic now


Modified by White Smoke at 5:24 PM 5/30/2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by White Smoke &raquo;</TD></TR><TR><TD CLASS="quote">

Wont work like that... The regulator HAS to go after the the rail on a fuel return system. You can put it on either side of the rail but is has to get feed&gt;rail&gt;reg&gt;return line. No ifs ands or buts. The regulator creates a restriction between the return line and the feed to keep the pressure up on the feed side.

Sorry Dude</TD></TR></TABLE>

there is a dual port areomotive that I think makes the two inlets equal and a third port for restriction




<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">
tony1 (10:49 AM 5/30/2007): i've done it that way, and it works, but i question the fuel flow capability of having to run through the regulator before the rail. How much power are you looking to make?

I had a customer with a VW setup like that, it made 570whp with no problem with it, so i'm sure it'll work fine without question at anything less than 500whp.
</TD></TR></TABLE>
they do run it on lower power motors&lt; na ks and such no problem [IMG][/IMG] [IMG][/IMG]

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by White Smoke &raquo;</TD></TR><TR><TD CLASS="quote">

Wont work like that... The regulator HAS to go after the the rail on a fuel return system. You can put it on either side of the rail but is has to get feed&gt;rail&gt;reg&gt;return line. No ifs ands or buts. The regulator creates a restriction between the return line and the feed to keep the pressure up on the feed side.

Sorry Dude</TD></TR></TABLE>

+1 ^^^^^^^^ I totally agree your fuel reg has 2 be at the end of your fuel rail be careful you can damage your engine

 

I can see the pic now


Modified by White Smoke at 5:24 PM 5/30/2007

 

Sorry, you can, you're wrong.

 

so he wants to put the regulator before the fuel rail and use the stock feed as the return and an aftermarket braided line for the actual inlet?

So ur just reversing the way the regulator flows?
I dont see it making a difference.

 

nm, i get it now.

Seems like eventually it would cause lean cond., but im sure u could make some power like tony said.

 

OK, after re-reading the OP post I think I understand what he is saying. (can't see pics)

He is only going to use one port on the rail, that is nothing like what I was saying would not work.

 

It doesn't seem right, but i promise you it works. Both side ports on the regulator are connected and will maintain equal pressure as long as the pump can keep up. The regulator will bypass excess fuel to maintain a given pressure at both side ports of the regulator.

I've seen it in many GM engine applications, K series swaps in EG's, and on a 570whp VW i tuned.

 

I can understand what he is saying now and it makes perfect sense why it would work with a dual feed regulator. I read it as he wanted to run feed&gt;reg&gt;rail&gt;return using both ports on the rail.

 

Good info guys, thanks tony

I also called aeromotive and the guy said dead end rails are good up to 600ish hp. LS1 stock rails are setup this way and they can make 600whp on them no problem. If you want to step up, thats when u really need a flow thought design.