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SVTPerformance's Chain of Restaurants
The Distillery
Lethal Return FPR loosing psi.
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<blockquote data-quote="JeremyH" data-source="post: 15630538" data-attributes="member: 160292"><p>Jons advice is spot on. Even on "small" factory lines they will continue to flow fuel as pump outlet pressure goes up. When the pump cant put out any more pressure is when flow would drop and in return a drop at the rails. Dual 465 is 1200hp worth of fuel so its not a flow issue unless you have a physical pump issue which is doubtful on a new setup. In short, as long as you have enough pump you can push as much flow and power you want through a given line. There's just more restriction so pump outlet pressure is higher. I will agree that its not idea for that flow and it will definitely shorten pump life and an upgrade to a larger feed and return line to 8an would def be more efficient, that's a great idea as well.</p><p></p><p>With the proper baffled filter sock ( walbro 125-190 ) you can smash that sucker right on the bottom tank no problem as its internal structure prevents it from collapsing and it pulls fuel radially 360 degrees through the filter. I have a customer with a single 465 pump setup with a 67mm turbo and he made 625rwhp with the one pump flat on the bottom of the tank with that filter.</p><p></p><p>I will tell you not all regulators are created equal. And the demands on a basic pass through suitable regulator (where its meant to be post rails) are much higher when its pre rails. Its now acting more like a bypass valve and the fuel is dead ending in the rails. Ideally you want a quality 4 port regulator for this setup where feed line comes in and each rail has a dedicated line from the regulator and then return out the bottom.</p><p></p><p>I cringe a little every time I see "budget" return system so remember that's exactly what it is. I personally would never spec a system with that much pump for that kind of regulator rail setup, its a lack of understanding or care to get a product out the door or both it seems.</p><p></p><p>That said if your efforts bring you to swapping out the regulator I would highly recommend a Fore unit. Best regulators on the market from a company that specifically specializes in fuel systems. I use them exclusively for fuel systems and not once had an issue with their regulators on any setup. But as recommended a proper line/filter rail setup would be my first upgrade to that setup.</p></blockquote><p></p>
[QUOTE="JeremyH, post: 15630538, member: 160292"] Jons advice is spot on. Even on "small" factory lines they will continue to flow fuel as pump outlet pressure goes up. When the pump cant put out any more pressure is when flow would drop and in return a drop at the rails. Dual 465 is 1200hp worth of fuel so its not a flow issue unless you have a physical pump issue which is doubtful on a new setup. In short, as long as you have enough pump you can push as much flow and power you want through a given line. There's just more restriction so pump outlet pressure is higher. I will agree that its not idea for that flow and it will definitely shorten pump life and an upgrade to a larger feed and return line to 8an would def be more efficient, that's a great idea as well. With the proper baffled filter sock ( walbro 125-190 ) you can smash that sucker right on the bottom tank no problem as its internal structure prevents it from collapsing and it pulls fuel radially 360 degrees through the filter. I have a customer with a single 465 pump setup with a 67mm turbo and he made 625rwhp with the one pump flat on the bottom of the tank with that filter. I will tell you not all regulators are created equal. And the demands on a basic pass through suitable regulator (where its meant to be post rails) are much higher when its pre rails. Its now acting more like a bypass valve and the fuel is dead ending in the rails. Ideally you want a quality 4 port regulator for this setup where feed line comes in and each rail has a dedicated line from the regulator and then return out the bottom. I cringe a little every time I see "budget" return system so remember that's exactly what it is. I personally would never spec a system with that much pump for that kind of regulator rail setup, its a lack of understanding or care to get a product out the door or both it seems. That said if your efforts bring you to swapping out the regulator I would highly recommend a Fore unit. Best regulators on the market from a company that specifically specializes in fuel systems. I use them exclusively for fuel systems and not once had an issue with their regulators on any setup. But as recommended a proper line/filter rail setup would be my first upgrade to that setup. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Distillery
Lethal Return FPR loosing psi.
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