Sufficient fuel system for 500rwhp?

[digitalsolo]

There are issues with the brackets for the Pro Products rails.   I had them shift and leak, as did a friend of mine.

If you make new brackets, you're all set with them though.

[Jordan Innovations]

How about a fuel rail question - Professional products fuel rails are like $50, and FAST fuel rails are $200.  How much of a difference is there between them?

I have the Professional Products ones, they look pretty good.  Except for not coming with the correct -8an fittings like the package says it should, and not coming with a crossover, I love 'em.  And yeah, got 'em from Summit on a price match forr $55!

[sinful7]

i am running stock fuel rails.. I dont hear much bad things about them honestly.. but then again I havent went over board on my setup have I? lol

[BeasTT]

The summit racing rails are the best bang for the buck

[skinnies]

i am running stock fuel rails.. I dont hear much bad things about them honestly.. but then again I havent went over board on my setup have I? lol

stock fuel rails are fine to the 900rwhp range on gas, others have made more honestly. We just did 790rwhp on a buddies car on the stock rails on e85 without any problems. 

[zbrown]

I have the NASTY rails because i hate NPT...... O-ring for me anyday


500 is cheap




i have 1500 just into my injectors, pump, and FPR without any fittings or anything

[383mazda]

stock fuel rails are fine to the 900rwhp range on gas, others have made more honestly. We just did 790rwhp on a buddies car on the stock rails on e85 without any problems. 
[/quote]


Do'h!  I just sold my stock rails, lol...  So it sounds like the stock internals of the Gen III motors will let go before the stock LS1 fuel rails will become a bottle neck; I'll keep an eye out for a cheap set then.

What I've got from this thread so far (have't re-read everything in a while) is that -8AN fuel line from a bosch 044 pump mounted in tank with stock fuel rails will support 500rwhp.  Everyone I've talked to or read about also has 60# injectors (do the mototrons play nice with the stock rails?). 

What's left - FPR, fuel filter and size of the return line?  What do you guys use and where do you place them?

[digitalsolo]

If you're feeding with -8, -6 is fine for return.

If you're boosted, boost referenced FPRs are nice for keeping pulsewidths down at idle, and flow rates good under boost.

As long as you get the right type of Mototron (Siemens) injectors, they'll fit stock rails fine.

[383mazda]

I just read another post of yours Blake about getting aftermarket rails in order to put an FPR after the rails - makes sence.  Back to hunting down some "after market" rails now...

[BeasTT]

http://www.summitracing.com/parts/SUM-240050/

I think the only ones cheaper than these are the pro products ones (or were when I bought mine) but these rails have BEEFY brackets

[digitalsolo]

Yeah, post rail FPR is technically the "best" way to do it, I don't know that it's particularly critical at these power levels, but for the cost (vs. everything else) it's not a bad idea.

Plus, aftermarket rails certainly do look nice. 

[383mazda]

A buddy of mine is making his own boost referrenced boost a pump.  He's doing a twin walbro in tank setup, he'll turn on the second pump under boost and crank up to voltage as boost goes up.

So how would you run the in tank walbro and the inline 044 pump and avoid sending tons of fuel through the rails and return line when you're just putting around town?  Or is pumping all that fuel through the lines not that big of a deal?

[Jordan Innovations]

A buddy of mine is making his own boost referrenced boost a pump.  He's doing a twin walbro in tank setup, he'll turn on the second pump under boost and crank up to voltage as boost goes up.

So how would you run the in tank walbro and the inline 044 pump and avoid sending tons of fuel through the rails and return line when you're just putting around town?  Or is pumping all that fuel through the lines not that big of a deal?

It's inefficient to move that much more fuel than you need, but that's what a proper regulator and return setup is for.  Not a big deal, besides extra wiring, extra amp draw, and the extra noise (none are an issue to me, but I have customers who've complained about each).

[digitalsolo]

Just keep a good amount of fuel in the tank so that the fuel doesn't get too hot and moving lots of fuel is no problem.

[V8-rx7]

Not to thread jack, but I am slowly piecing together my fuel system. Not 100% set on a pump and how to run the lines yet, so I am open to suggestions.
So far I have an Aeromotive A1000 -10 regulator and a set of Fast Billet Rails. I an going to build a baffled sump for my tank, and was going to run a Weldon inline pump. But after talking with Weldon they told me I couldn't run that pump with E85. So now I am leaning toward 2 044s running externally, or a single Magnafuel. This will be a mostly street driven car. Hoping to make around 650rwhp with E85.

Also I am not sure whether to run a y block off the regulator and feed the rails from the back and plug the ends. Or run in from the driver loop around and have the regulator off the end of  the rail. I was gonna run a -8 feed and a -6 return but my hose guy was saying to run a -10 feed (I think he might be a bit biased....).